1993 Jeep Cherokee

AUTOMATIC TRANSMISSIONS

Aisin Warner 4 Electronic Diagnosis

1993-94 Cherokee

APPLICATION

NOTE: Transmission may also be referred to as AW-4.

APPLICATION

Model Trans.

1993-94 Cherokee (1) AW-4

(1) - Used on vehicles with 4.0L 6-cylinder engine only for 1993-94 model years.

NOTE: Vehicle body code may be required when diagnosing or

repairing transmission, as body code may be used instead of vehicle model name. See BODY CODE DESIGNATION table.

BODY CODE DESIGNATION

Vehicle Model Body Code

Cherokee XJ

DESCRIPTION

The electronic control system for the AW-4 transmission controls transmission shift points and torque converter lock-up. Electronic control system consists of Transmission Control Module (TCM), valve body solenoids, throttle position sensor, speed sensor, neutral safety switch and brake switch.

NOTE: Transmission Control Module (TCM) may be referred to as

Transmission Control Unit (TCU). Neutral safety switch may be referred to as park/neutral safety switch or gear select switch.

OPERATION

TRANSMISSION CONTROL MODULE (TCM)

The TCM determines shift points and torque converter lock-up based on input signals received from throttle position sensor, neutral safety switch, speed sensor and brake switch. The TCM controls transmission shift points and torque converter lock-up by operating electric solenoids mounted on the valve body.

The TCM contains a self-diagnostic system used for

determining an electronic component failure. The TCM self-diagnostic system will store a diagnostic trouble code in the TCM memory if certain electronic problems exist. If electronic problem goes away, diagnostic trouble code will be erased from TCM memory after ignition has been cycled approximately 75 times.

NOTE:

Diagnostic trouble code may be referred to as fault code.

Shifter Position "D" (Drive) 1st Gear	No. 1 Solenoid ON	No. 2 Solenoid OFF
2nd Gear	ON	.............. ON
3rd Gear	OFF	ON
4th Gear	OFF	OFF
" 3 " 1st Gear	ON	OFF
2nd Gear	ON	.............. ON
3rd Gear	OFF	ON
"1-2" 1st Gear	ON	OFF
2nd Gear	ON	.............. ON
"R" (Reverse)	ON	OFF
"N" Or "P"	ON	OFF

(1) - Valve body contains 3 valve body solenoids. See Fig. 2. No. 1 and 2 valve body solenoids are used for controlling transmission shifts. No. 3 valve body solenoid is used for torque converter lock-up only.

92F13511

Fig. 2: Identifying Valve Body Solenoids Courtesy of Chrysler Corp.

BRAKE SWITCH

Brake switch is an input device mounted above the brake pedal. When brake pedal is operated, brake switch delivers an input signal to the TCM. The TCM uses input signal for controlling No. 3 valve body solenoid for torque converter lock-up.

NEUTRAL SAFETY SWITCH

NOTE: Neutral safety switch may be referred to as park/neutral safety switch or gear select switch.

Neutral safety switch is an input device mounted on the transmission manual valve shaft. Neutral safety switch delivers an input signal to TCM, indicating transmission manual valve gear position.

SPEED SENSOR

Speed sensor, mounted in adapter housing or extension

housing, is an input device consisting of speed sensor rotor and speed sensor. Speed sensor rotor is mounted on transmission output shaft. Input signal is delivered from speed sensor to TCM with each revolution of transmission output shaft. The TCM uses input signal for controlling transmission operation.

THROTTLE POSITION SENSOR (TPS)

The TPS, mounted on throttle body, determines throttle position and delivers an input signal to TCM. The TCM uses input signal for controlling transmission upshifts and torque converter lock-up.

SELF-DIAGNOSTIC SYSTEM

DIAGNOSTIC PROCEDURE

When performing vehicle diagnosis:

65535. Ensure transmission fluid level is correct and fluid is neither
       contaminated nor aerated.

65536. Ensure shift cable is properly adjusted. Refer to the appropriate
       TRANSMISSION SERVICING - A/T article in this section.

65537. Ensure battery is fully charged.

65538. Perform visual inspection, ensuring all electrical connections at
       transmission, TCM, throttle position sensor, neutral safety
       switch, speed sensor and brake switch are clean and properly
       installed.

65539. Perform TEST 1A - VERIFICATION OF COMPLAINT under TROUBLE
       SHOOTING CHARTS in this article.

65540. Repair diagnostic trouble codes in order displayed.

65541. Always perform TEST 2A - VERIFICATION TEST after repair is
       completed. See TEST 2A - VERIFICATION TEST under TROUBLE
       SHOOTING CHARTS in this article.

RETRIEVING DIAGNOSTIC TROUBLE CODES

NOTE: Manufacturer recommends using Chrysler�s Diagnostic Readout Box-II (DRB-II) with proper cartridge for system diagnosis. Other after-market scan tools may be used for system diagnosis. The following procedure is for DRB-II scan tool usage. Use manufacturer�s instruction for operating the DRB-II scan tool. When retrieving diagnostic trouble codes

using DRB-II, you must first enter AW4 MENU and then retrieve diagnostic trouble codes.

NOTE: Ensure TEST 1A - VERIFICATION OF COMPLAINT is performed when trouble shooting the vehicle. This test checks for diagnostic trouble codes with vehicle stationary and during road test. See TEST 1A - VERIFICATION OF COMPLAINT under TROUBLE SHOOTING CHARTS.

NOTE: The DRB-II scan tool can be used in several different modes using manufacturer�s instructions to activate system components and perform several tests on transmission. See DRB-II OPERATING MODES.

Entering AW4 MENU

1) Ensure ignition is off. Connect DRB-II to 6-pin

transmission diagnostic connector. See Fig. 3. Transmission diagnostic connector is located on driver�s side of instrument panel, above accelerator pedal.

2) Turn ignition on. Copyright date and diagnostic program will be briefly displayed. If DRB-II displays an error message, proceed to DRB-II PROBLEMS & ERROR MESSAGES. The following are possible error messages that may appear.

CARTRIDGE ERROR HIGH BATTERY

65535. KEYPAD TEST FAILURE

65536. LOW BATTERY

65537. RAM TEST FAILURE

1. If no error messages appear, display will read as follows
   after a few seconds: 1) VEHICLES TESTED, 2) HOW TO USE, 3) CONFIGURE
   and 4) SELECT SYSTEM.

2. Select 4) SELECT SYSTEM to enter diagnostic system. Once
   in SELECT SYSTEM, select 2) TRANSMISSION to enter transmission.
   Display will read 1) EATX and 2) AW4.

3. Select 2) AW4. After a few seconds display will change to
   read AW4, VERSION 01. After a few seconds, display will read AW4 MENU,
   1) SYSTEM TEST and 2) READ FAULTS. If DOWN ARROW is depressed 3 times,
   display will read as follows: 3) STATE DISPLAY, 4) ACTUATOR TESTS and
   5) ADJUSTMENTS.

NOTE: The ACTUATOR TESTS and ADJUSTMENTS cannot be used when diagnosing the AW-4 transmission.

Retrieving Diagnostic Trouble Codes

4. Select 2) READ FAULTS from AW4 MENU. If no diagnostic
   trouble code exists, display will read as follows: AW4 FAULTS, NO
   FAULTS DETECTED.

5. If diagnostic trouble code exists, the following message
   will be displayed: 1 OF 3 FAULTS. This number will vary depending on
   number of diagnostic trouble codes stored in the TCM memory.

6. Diagnostic trouble code and message will be displayed.
   Press DOWN ARROW key to display next diagnostic trouble code. To
   identify diagnostic trouble code, see

DIAGNOSTIC TROUBLE CODE IDENTIFICATION table.

NOTE: See TROUBLE SHOOTING CHARTS to diagnose faults indicated by trouble codes.

NOTE: Valve body solenoid diagnostic trouble code 700 may appear in a FAULT PRESENT or FAULT STORED status. Status will be displayed along with diagnostic trouble code. Diagnostic trouble code must be diagnosed depending on the status. See TEST 1A - VERIFICATION OF COMPLAINT under TROUBLE SHOOTING CHARTS.

DIAGNOSTIC TROUBLE CODE IDENTIFICATION

Trouble Code Problem Area

700 (1) Valve Body Solenoid

702 Speed Sensor

703 (2) Gear Select Switch

705 Throttle Position Sensor

706 Brake Switch

707 Wrong TCM Or TCU

(1) - Trouble code may apply to individual valve body solenoids. Valve
body solenoid may be referred to as S1 for No. 1, S2 for No. 2 and S3
for No. 3.

(2) - Gear select switch is the same as the neutral safety switch.

CLEARING DIAGNOSTIC TROUBLE CODES

1) Once all diagnostic trouble codes have been obtained, diagnostic trouble code(s) can be erased from TCM memory by disconnecting electrical connector from TCM for at least 15 seconds.

CAUTION: DO NOT disconnect battery, as data stored in other vehicle control modules will be lost.

2) The TCM is located behind right side of instrument panel on Cherokee. See Fig. 1.

DRB-II OPERATING MODES

NOTE: The DRB-II can be operated in several different modes

to perform various tests. Except for voltmeter/ohmmeter and HOW TO USE modes, all other operating modes are selected from AW4 MENU. See ENTERING AW4 MENU under RETRIEVING DIAGNOSTIC TROUBLE CODES .

VOLTMETER/OHMMETER MODE

To access voltmeter/ohmmeter mode, connect Red volt-ohmmeter test lead to Red port at top right corner of DRB-II. There are 2 different ports on top of DRB-II; ensure test lead is connected to proper port. Access voltmeter or ohmmeter mode using manufacturer�s instructions.

NOTE: The DRB-II is grounded through transmission diagnostic connector and only one test lead is required. When diagnosing transmission, an external volt-ohmmeter may sometimes be required.

HOW TO USE MODE

7. This mode gives instructions on DRB-II usage. To enter
   this mode, see steps 1) through 4) of ENTERING AW4 MENU under
   RETRIEVING DIAGNOSTIC TROUBLE CODES. Select 2) HOW TO USE.

8. A series of screens will be displayed explaining DRB-II
   key usage for system diagnosing.

SYSTEM TEST MODE

NOTE: SYSTEM TEST mode consists of a stationary test and a road test. The SYSTEM TEST mode must be selected from AW4 MENU. Refer to ENTERING AW4 MENU under RETRIEVING DIAGNOSTIC TROUBLE CODES .

9. Stationary test monitors transmission system data, current
   valve body solenoid failures, switch failures, correct TCM
   application, calibration and operation. Road test checks all valve
   body solenoids and speed sensor.

10. Technician will be instructed to place shift lever in each
    gear position, starting by shifting into 1-2 position. Once
    transmission is in Park, brake pedal must be depressed to check brake
    switch.

11. After brake switch is checked, technician will be

instructed to slowly depress throttle. DRB-II will display 7 asterisks (*******) corresponding to throttle position. While depressing accelerator, Throttle Position Sensor (TPS) sweeps through entire range of positions required by the TCM.

12. A corresponding asterisk will be cleared from DRB-II
    display as each throttle position is sensed by TCM. Several attempts
    may be required to clear all asterisks from the display, depending on
    how fast accelerator is depressed.

13. After throttle position is checked, technician will be
    instructed to drive the vehicle. The DRB-II will indicate if a

requested action is seen by the TCM. If technician is requested to perform a particular operation and TCM does not acknowledge the action, press ENTER key to continue testing.

14. The TCM will instruct technician to accelerate vehicle at
    light throttle to ensure transmission shifts through all gears,
    indicating proper valve body solenoid operation.

15. During road test, ensure vehicle can be accelerated slowly
    and evenly to allow transmission to enter all gear ranges without
    downshifting or braking. If a failure is sensed, a diagnostic trouble
    code will be displayed on DRB-II.

NOTE: If TCM senses a failure, control logic activates a specified valve body solenoid to obtain a certain gear depending on failure. Because transmission diagnostic trouble codes are displayed one at a time, multiple diagnostic trouble codes must be identified by retesting transmission.

STATE DISPLAY MODE

NOTE: STATE DISPLAY mode must be selected from AW4 MENU. See

ENTERING AW4 MENU under RETRIEVING DIAGNOSTIC TROUBLE CODES . Select 3) STATE DISPLAY on DRB-II.

Module Information

When selecting module information option, the TCM version will be indicated by a 2-digit number. Information can be used to verify proper TCM application.

Sensor

16. When selecting sensor option, TPS and RPM indications will
    be shown. The TPS indicator will display a 7 segment bar graph,
    indicating TPS position and throttle plate angle.

17. A properly operating TPS should indicate 7 segments
    through full throttle travel. The RPM indicator will display
    transmission output shaft revolutions per minute.

Brake Switch Or Input/Output

Display indicates brake switch status, indicating whether brake pedal is applied or released. Display also indicates shift lever position, whether a valve body solenoid is on or off and present transmission operating gear.

DRB-II PROBLEMS & ERROR MESSAGES

CARTRIDGE ERROR

18. If CARTRIDGE ERROR message is displayed, disconnect DRB-II
    from transmission diagnostic connector. DO NOT touch keys on DRB-II
    keypad. Reconnect DRB-II to transmission diagnostic connector and note
    display.

19. If CARTRIDGE ERROR message is displayed, replace DRB-II
    cartridge and proceed with diagnostics. If KEYPAD TEST FAILURE message
    is displayed, replace DRB-II and proceed with diagnostics.

HIGH BATTERY

If HIGH BATTERY message is displayed, use external voltmeter to check battery voltage at battery terminals. If battery voltage is 11.7-13.0 volts, replace DRB-II. If battery voltage is not 11.7-13.0 volts, check charging system.

KEYPAD TEST FAILURE

20. If KEYPAD TEST FAILURE message is displayed, disconnect
    DRB-II from transmission diagnostic connector. DO NOT touch keys on
    DRB-II keypad. Reconnect DRB-II to transmission diagnostic connector
    and note display.

21. If KEYPAD TEST FAILURE message is not displayed, proceed
    with diagnostics. If KEYPAD TEST FAILURE message is displayed, replace
    DRB-II and proceed with diagnostics.

LOW BATTERY

If LOW BATTERY message is displayed, use external voltmeter to check battery voltage at battery terminals. If battery voltage is 11.7-13.0 volts, replace DRB-II. If battery voltage is not 11.7-13.0 volts, check charging system.

RAM TEST FAILURE

22. If RAM TEST FAILURE message is displayed, disconnect DRB-
    II from transmission diagnostic connector. DO NOT touch keys on DRB-II
    keypad. Reconnect DRB-II to transmission diagnostic connector and note
    display.

23. If RAM TEST FAILURE message is not displayed, proceed with
    diagnostics. If RAM TEST FAILURE message is displayed, replace DRB-II
    and proceed with diagnostics. If KEYPAD TEST FAILURE message is
    displayed, replace DRB-II and proceed with diagnostics.

COMPONENT TESTING

BRAKE SWITCH TEST

Brake switch is mounted above brake pedal. When brake pedal is operated, brake switch delivers an input signal to TCM. The TCM uses input signal for controlling No. 3 valve body solenoid for torque converter lock-up. No other information is available from manufacturer.

NOTE: For proper brake switch adjustment, see BRAKE SWITCH R & I under REMOVAL & INSTALLATION.

NEUTRAL SAFETY SWITCH TEST

NOTE: Neutral safety switch may be referred to as park/neutral or gear select switch. For proper neutral safety switch adjustment, see NEUTRAL SAFETY SWITCH R & I under REMOVAL & INSTALLATION.

Disconnect electrical connector. Note terminal

identification. See Fig. 4. Using ohmmeter, check continuity between specified terminals in relation to shift lever position. See the NEUTRAL SAFETY SWITCH CONTINUITY SPECIFICATIONS table. Replace neutral safety switch if continuity is not as specified.

NEUTRAL SAFETY SWITCH CONTINUITY SPECIFICATIONS

Shift Lever Position Continuity Between Terminals

Park "B" & "C"

Reverse "A" & "E"

Neutral "B" & "C"

Drive ( 1)

3 "A" & "G"

1-2 "A" & "H"

(1) - No continuity should exist between any terminals.

_92113514

Fig. 5: Identifying TPS Electrical Connector Courtesy of Chrysler Corp.

VALVE BODY SOLENOID TEST

With oil pan removed, disconnect electrical connector from valve body solenoid. Using ohmmeter, check resistance between valve body solenoid electrical terminal and solenoid mounting bracket. Replace valve body solenoid if resistance is not 11-15 ohms.

TROUBLE SHOOTING CHARTS & CODE CHARTS

NOTE: Following trouble shooting charts and illustrations are courtesy of Chrysler Corp. Always start by performing TEST 1A - VERIFICATION OF COMPLAINT. When diagnosing transmission, it may be necessary to verify TCM connector terminals, circuits and function, See Fig. 6.

NOTE: When using trouble shooting charts, Transmission Control

Module (TCM) may be referred to as Transmission Control Unit (TCU). Diagnostic trouble code may be referred to as fault code. Neutral safety switch may be referred to as park/neutral or gear select switch.

CHEROKEE

CAV... CIRCUIT FUNCTION

C1-C2 Not Used

C3 505 TN/BK Trans Speed Sensor

C4 137 YL/BK Auto Trans Diagnostic

C5-C7 Not Used

C8 506 LG/BK Low (1-2) Input

C9 507 GY/BK Drive (3) Input

C10 K29 WT/PK Brake Input

C11 Not Used

C12-C13 Not Used

C14 508 WT/BK S3 Solenoid

(Converter Lockup)

C15 509 VT/WT S2 Solenoid

C16 510DB/WT S1 Solenoid

D1 Not Used

D2 K22 OR/DB Throttle Position Sensor

D3 K4BK/LB TPS Signal Ground

D4-D6 Not Used

D7 212BK/TN Power Ground

D8-D13 Not Used

D14 A14RD Battery

D15 Not Used

D16 T17 YL Ignition (Run/On)

: TCM Connector Terminals I.D., Circuits

Fig.

Courtesy of Chrysler Corp.

GRANDCHEROKEE

CAV... CIRCUIT FUNCTION

C1-C2 Not Used

C3 T14 LG/WT Trans Speed Sensor

C4 D82 BfVYL Auto Trans Diagnostic

C5-C7 Not Used

C8 T25 LG Low (1-2) Input

C9 T50 DG Drive (3) Input

C10 .... L53 BR Brake Input

C11-C13 Not Used

C14 .... T20 LB/BR S3 Solenoid

(Converter Lockup)

C15 .... T59 PK S2 Solenoid

C16 .... T60 BR/YL S1 Solenoid

D1 Not Used

D2 K22 OR/DB Throttle Position Sensor

D3 K4 BK/LB TPS Signal Ground

D4-D6 Not Used

D7 21 BK Power Ground

D8-D13 ,. Not Used

D14 .... A14 RD/WT Battery

D15 Not Used

D16 .... F86 LB/RD Ignition (Run/On)

& Functions

NOTE:

ALWAYS start diagnosis with the most recent code.

connector. See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM for diagnostic connector location.

CAUTION: If the vehicle is in 3rd or OD position and feels

like it is stuck in 3rd or jumping from 2-1 or 3-1, perform TEST 10A - TESTING FOR INTERMITTENT SPEED SENSORS .

31. With the DRB-II, perform SYSTEM TEST. See SYSTEM TEST MODE
    under DRB-II OPERATING MODES.

32. The DRB-II will instruct you to do some actions during the
    System Test. The DRB-II will then look for the action to happen and
    automatically go to the next test function. If you perform the
    required action and the DRB-II does not move to the next function,
    press ENTER. The DRB-II will continue the testing.

33. When the DRB-II states "VEHICLE DRIVE", the vehicle be
    must be driven at a speed above 4 miles per hour to ensure accurate
    testing of the vehicle speed sensor. Afterwards, the DRB-II will
    display any fault codes that may be present.

34. When the system test is complete, if there are any fault
    codes present, the DRB-II will automatically display the code(s).

35. There are two types of faults for the transmission

solenoids. They are displayed as "FAULT STORED" and "FAULT PRESENT". Note that the tests are different in the chart below.

8) Perform the tests shown below in response to the indicated
fault codes.

NOTE: ALWAYS start diagnosis with the most recent code.

CODE-TO-TEST MENU

CODE-TO-TEST MENU

Code:	Solenoid Affected:		Fault	Status:	Perform:
None	None Affected		No Faults		TEST	2A
700	Solenoid No.	1	Fault	Present	TEST	4A
700	Solenoid No.	1	Fault	Stored	TEST	ЗА
700	Solenoid No.	2	Fault	Present	TEST	4B
700	Solenoid No.	2	Fault	Stored	TEST	ЗА
700	Solenoid No.	3	Fault	Present	TEST	4C
700	Solenoid No.	3	Fault	Stored	TEST	ЗА
702	Speed Sensor	Fault		П	TEST	5A
703	Gear Select	Fault		I!	TEST	6A
705	TPS Fault			П	TEST	7A
708	Wrong TCU			I!	TEST	9A

TEST 2A - VERIFICATION TEST

NOTE: Perform TEST 1A - VERIFICATION OF COMPLAINT before proceeding.

This test verifies the correct operation of the AW4

transmission. It must be performed after finding no faults using the DRB-II, and after a vehicle repair has been made.

36. Turn ignition key to "OFF".

37. Hold the MODE key and press the ATM key on the DRB-II at
    the same time to restart the DRB-II.

38. Turn ignition key to "ON".

39. Reconnect all previously disconnected connectors.

40. Verify that the AW4 transmission control unit is properly

41. Make sure the transmission fluid is at the proper level.
    Check the fluid with the transmission temperature hot, the vehicle on
    level ground, and the gear selector in neutral.

42. If any repairs have been made, test the vehicle as
    instructed in TEST 1A - VERIFICATION OF COMPLAINT., and read the
    faults using the DRB-II. If there are any fault messages present,
    repeat TEST 1A - VERIFICATION OF COMPLAINT.

TEST 3A - STORED DIAGNOSTIC TROUBLE CODES TEST

A	B	С	E	F	G	H
BK/YL	BK/TN	TfSl/WT	WT/BK	VTAVT	DB/WT	BK/RD

92G13595

Fig. 8: Test 3A - View of 7-Way Connector (Cherokee)

TEST 4A - CODE 700 - S1 SOLENOID CIRCUIT

Perform TEST 1A before proceeding.

Fig. 9: Test 4A - Code 700, Flow Chart (1 of 2)

92J13598

Fig. 10: Test 4A - Code 700, Schematic (Cherokee)

92D13600 ZJBody: BR/YL

Test 4A - Code 700, TCU 32-Way Connector (Cavity 16)

92F13594

Fig. 12: Test 4A - Code 700, Location of 7-Way Connector

Transmission

Lt. Gray

7-Way Connector

В

BK

BK/TN

92E13601

- Code 700, Location of Pin "B" (Ground)

Fig. 13: Test 4A

NOTE: See TEST 4A (1 OF 2) for wiring diagram.

92F13602

Fig. 14: Test 4A - Code 700, Flow Chart (2 of 2)

92J13598

Fig. 15: Test 4A - Code 700, Schematic (Cherokee)

Transmission

Lt. Gray

7-Way Connector

92G13603

Fig. 16: Test 4A - 7-Way Connector Cavity "G" (Cherokee)

TCU 32-WAY CONNECTOR

_li

DB/WT

Fig. 19:

92J13606

Test 4A - Code 700, Solenoid No. 1 Wire (Cavity "G")

Perform TEST 4A before proceeding.

92J13598

Fig. 22: Test 4B - Code 700, Schematic (Cherokee)

92F13594

Fig. 24: Test 4B - Code 700, Location of 7-Way Connector

NOTE: See TEST 4B (1 OF 2) for wiring diagram.

92F13610

Fig. 25: Test 4B - Code 700, Flow Chart (2 of 2)

92J13598

Fig. 26: Test 4B - Code 700, Schematic (Cherokee)

Transmission

Lt. Gray

7-Way Connector

_I.

XJ BODY

92G13611

Fig. 27: Test 4B - 7-Way Connector Cavity "F" (Cherokee)

CAV	MJ/XJ	ZJ
F	VT/WT	PK

Fig. 30: Test 4B - Code 700, Solenoid No. 1 Wire (Cavity "F")

Transmission

Lt. Gray

7-Way Connector

_I

92J136U Solenoid #2

_92J136UConnector

Fig. 31: Test 4B - Code 700, Testing S2 Control Wire

TEST 4C - CODE 700 - S3 SOLENOID CIRCUIT

Perform TEST 4A before proceeding.

92J13598

Fig. 33: Test 4C - Code 700, Schematic (Cherokee)

Fig.

92F13594

35: Test 4C - Code 700, Location of 7-Way Connector

NOTE: See TEST 4C (1 OF 2) for wiring diagram.

92D13618

Fig. 36: Test 4C - Code 700, Flow Chart (2 of 2)

92J13598

Fig. 37: Test 4B - Code 700, Schematic (Cherokee)

Transmission

Lt. Gray

7-Way Connector

XJ BODY

Э2Е13619

Fig. 38: Test 4C - 7-Way Connector Cavity "E" (Cherokee)

TCU 32-WAY CONNECTOR

C14 WT/BK

TEST 5A - CODE 702 - SPEED SENSOR CIRCUIT

NOTE: Perform TEST 1A - VERIFICATION OF COMPLAINT before proceeding.

Perform TEST 1A before proceeding.

7-WAY
94D38433 CONNECTOR

Fig. 44: Test 5A - Code 702, Speed Sensor Schematic (Cherokee)

92F13594

Fig. 46: Test 5A - Code 702, Location of 7-Way Connector

NOTE: See TEST 5A (1 OF 2) for wiring diagram.

94F3B435

Fig. 47: Test 5A - Code 702, Flow Chart (2 of 2)

7-WAY
94D38433 CONNECTOR

Fig. 48: Test 5A - Code 702, Speed Sensor Schematic (Cherokee)

Transmission

Lt. Grey

7-Way Connector

Fig. 49: Test 5A - Transmission 7-Way Connector (Male Side)

Fig. 50: Test 5A - Code 702, TCU 32-Way Connector (Cavity 3)

Fig. 51:

C3

TN/BK (XJ Body)

LG/WT (ZJ Body)

Test 5A - Code 702, TCU 32-Way Connector (Cavity 3)

Perform TEST 1A before proceeding.

MJ and XJ Bodies

Fig. 56: Test 6A - Location of Gear Select Switch Fuse (Cherokee)

ZJ Body: I_G 92G14262

Fig. 57: Test 6A - TCU 32-Way Connector (Cavity 8)

92H14263

Fig. 58: Test 6A - Code 703, Flow Chart (2 of 2)

B-U»V GEAR SELLCT

92 A14258 плмгпи

Fig. 59: Test 6A - Gear Select Switch Schematic (Cherokee)

92J14265

Fig. 62: Test 6A - Code 703,

XJ BODY

8-Way Black Connector Cavity "E"

before proceeding.

Perform TEST 6A before proceeding.

Э2С14268

Fig. 64: Test 6B - Code 703, Flow Chart

MJ and XJ Bodies

B-U»V GEAR SELLCT

92 A14258 плмгпи

Fig. 65: Test 6B - Gear Select Switch Schematic (Cherokee)

NOTE: Perform TEST 6A - CODE 703 - GEAR SELECT SWITCH CIRCUIT before proceeding.

Perform TEST 6A before proceeding.

Э2Н14271

Fig. 68: Test 6C - Code 703, Flow Chart

MJ and XJ Bodies

B-U»V GEAR SELLCT

92 A14258 плмгпи

Fig. 69: Test 6C - Gear Select Switch Schematic (Cherokee)

92F13594

Fig. 70: Test 6C - Code 703, Location of Gear Select Switch

Fig. 71: Test 6C - TCU 32-Way Connector (Cavity 9, Cherokee)

TEST 6D - CODE 703 - GEAR SELECT SWITCH CIRCUIT

NOTE:

Perform TEST 6A - CODE 703 - GEAR SELECT SWITCH CIRCUIT before proceeding.

Fig. 74: Test 6D - Location of Gear Select Switch Fuse (Cherokee)

_Э2В14275

Fig. 75: Test 6D - TCU 32-Way Connector (Cavities 8 & 9, Cherokee)

92D14277 *-PERFORM VERIFfCATlON TEST 2A.

Fig. 76: Test 6D - Code 703, Flow Chart (2 of 3)

92 A14258 плмгпи

Fig. 77: Test 6D - Gear Select Switch Schematic (Cherokee)

92B14275

Fig. 78: Test 6D - TCU 32-Way Connector (Cavities 8 & 9, Cherokee)

Э2Е14278

Fig. 79: Test 6D - Code 703, Flow Chart (3 of 3)

B-U»V GEAR SELLCT

92 A14258 плмгпи

Fig. 80: Test 6D - Gear Select Switch Schematic (Cherokee)

92F13594

Fig. 81: Test 6D - Code 703, Location of Gear Select Switch

Э2А14266

Fig. 82: Test 6D - 8-Way Black Connector Cavity "A" (Cherokee)

_{XJ BODY}

ZJ Body: DG 92114264

Fig. 84: Test 6D - Code 703, TCU 32-Way Connector (Cavity 9)

TEST 6E - CODE 703 - GEAR SELECT SWITCH CIRCUIT

NOTE: Perform TEST 6D - CODE 703 - GEAR SELECT SWITCH CIRCUIT before proceeding.

Fig. 85: Test 6E - Code 703, Flow Chart

92 A14258 плмгпи

Fig. 86: Test 6E - Gear Select Switch Schematic (Cherokee)

Fig.

9: Test 6E - 8-Way Black Connector Cavity "H" (Cherokee)

Perform TEST 6D before proceeding.

© - On XJ models, engine diagnostic connector is located at left side of engine compartment, near engine controller.

94138438

Fig. 91: Test 7A - Code 705, Flow Chart (1 of 2)

Fig. 92: Test 7A - Code 705, Schematic

• - PERFORM VERIFICATION TEST 2A.

NOTE: See TEST 7A {1 OF 2) for wiring diagram.

92F14287

Fig. 94: Test 7A - Code 705, Flow Chart (2 of 2)

ENGINE CONTROLLER

Fig. 95: Test 7A - Code 705, Schematic

92G14288

Fig. 96: Test 7A - Location of Throttle Position Sensor (TPS)

92C14292

Fig. 99: Test 7A - View of Engine Control Connector (Cavity 22)

TEST 8A - CODE 706 - BRAKE SWITCH CIRCUIT

NOTE: Perform TEST 1A - VERIFICATION OF COMPLAINT before proceeding.

Perform TEST 1A before proceeding.

92D14293 *" ^PERF0RM VERIFICATION TEST 2A.

Fig. 100: Test 8A - Code 706, Flow Chart

92E14294

Fig. 101: Test 8A - Code 706, Schematic (Cherokee)

Э2С13583

Fig. 103: Test 8A

- Location of Brake Switch Connector

Fig. 104: Test 8A - Code 706, Flow Chart

XJ BODY TCU

Engine Controller

Code 706, Schematic (Cherokee)

Perform TEST 8A before proceeding.

Э2Е14302

Fig. 111: Test 8B - Code 706, Flow Chart

used with 2.5.L

The DRB-II has determined that the wrong Transmission Control Unit (TCU) has been installed in the vehicle. There are two transmission control units available for the Jeep AW4 transmission. One is for the 4-cylinder 2.5L engine and the other is for the 6-cylinder 4.0L engine.

49. using the DRB-II, read MODULE INFO. See HELP 1 for
    assistance.

50. Determine what vehicle should be in the vehicle.

65535. 2.5L Engine: TCU 02 (Used in earlier years only)

65536. 4.0L Engine: TCU 01 (1993-94)

3) If the wrong transmission control unit is installed, the
vehicle shift points will be slightly different (the 2.5L engine TCU
has higher shift points).

TEST 10A - TESTING FOR INTERMITTENT SPEED SENSOR

NOTE: Perform TEST 1A - VERIFICATION OF COMPLAINT before proceeding.

7-WAY
94СЗЯ4ДП CONNECTOR

Fig. 116: Test 10A - Schematic (Cherokee)

92F13594

Fig. 117: Test 10A - Location of Transmission Connectors

XJ BODY

Fig. 119: Test 10A - Flow Chart (2 of 2)

94C38440

Fig. 120: Test 10A - Schematic (Cherokee)

7-WAY CONNECTOR

92G14254

Fig. 122: Test 10A - Location of Speed Sensor Connector

XJ BODY

Fig. 124: Transmission Wiring Diagram (Cherokee)

Courtesy of Chrysler Corp.

REMOVAL & INSTALLATION

BRAKE SWITCH R & I

Removal

Remove lower steering column cover or trim panels for access to brake switch (if necessary). Disconnect brake switch electrical connector. Thread brake switch from retainer and remove.

Fig.

CHEROKEE

CAV... CIRCUIT FUNCTION

C1-C2 Not Used

C3 505 TN/BK Trans Speed Sensor

C4 137 YL/BK Auto Trans Diagnostic

C5-C7 Not Used

C8 506 LG/BK Low (1-2) Input

C9 507 GY/BK Drive (3) Input

C10 K29 WT/PK Brake Input

C11 Not Used

C12-C13 Not Used

C14 508 WT/BK S3 Solenoid

(Converter Lockup)

C15 509 VT/WT S2 Solenoid

C16 510DB/WT S1 Solenoid

D1 Not Used

D2 K22 OR/DB Throttle Position Sensor

D3 K4BK/LB TPS Signal Ground

D4-D6 Not Used

D7 Z12B^N Power Ground

D8-D13 Not Used

D14 A14RD Battery

D15 Not Used

D16 T17 YL Ignition (Run/On)

125: TCM Connector Terminals I.D., Circuits

GRAND.CHEROKEE

CAV... CIRCUIT FUNCTION

C1-C2 Not Used

C3 T14 LG/WT Trans Speed Sensor

C4 D82 BK/YL Auto Trans Diagnostic

C5-C7 Not Used

C8 T25 LG Low (1-2) Input

C9 T50 DG Drive (3) Input

C10 .... L53 BR Brake Input

C11-C13 Not Used

C14 .... T20 LB/BR S3 Solenoid

(Converter Lockup)

C15 .... T59 PK S2 Solenoid

C16 .... T60 BR/YL S1 Solenoid

D1 Not Used

D2 K22 OR/DB Throttle Position Sensor

D3 K4 BK/LB TPS Signal Ground

D4-D6 Not Used

D7 21 BK Power Ground

D8-D13 ,. Not Used

D14 .... A14 RD/WT Battery

D15 Not Used

D16 .... F86 LB/RD Ignition (Run/On)

& Functions

Installation

51. Install brake switch in retainer. Reconnect brake switch
    electrical connector.

52. To check brake switch adjustment, slightly depress brake
    pedal and note operation of brake switch plunger. Brake switch plunger
    should fully extend when brake pedal free play is taken up and brake
    application begins.

53. Clearance between brake switch plunger and brake pedal
    should be approximately 1/8". If clearance is not within
    specification, pull brake pedal rearward as far as possible.

54. Brake pedal should contact brake switch plunger, pushing
    brake switch backward in retainer to provide proper adjustment. Ensure
    brake lights operate.

55. Recheck clearance between brake switch plunger and brake
    pedal with brake pedal depressed and free play taken up. Reinstall
    lower steering column cover or trim panels.

NEUTRAL SAFETY SWITCH R & I

NOTE: Neutral safety switch may be referred to as park/neutral or

gear select switch.

Removal

56. Apply parking brake. Raise and support vehicle. Disconnect
    electrical connector at neutral safety switch. Pry lock washer tabs
    away from retaining nut. See Fig. 126.

57. Remove retaining nut, lock washer and adjusting bolt. See
    Fig. 126. Remove neutral safety switch from manual valve shaft.

Installation

58. Disconnect shift control rod from transmission shift
    lever. Rotate transmission shift lever fully rearward and then forward
    2 detents to Neutral position.

59. Install neutral safety switch on manual valve shaft.
    Install adjusting bolt but DO NOT tighten at this time.

60. Install lock washer and retaining nut. Tighten retaining
    nut to specification. See TORQUE SPECIFICATIONS. DO NOT bend over lock
    washer tabs at this time.

61. Ensure transmission is still in Neutral. Rotate neutral
    safety switch and align neutral standard line with vertical groove on
    manual valve shaft. See Fig. 126.

62. Tighten adjusting bolt to specification. See

TORQUE SPECIFICATIONS at end of article. Bend lock washer tabs over. Reconnect shift control rod and electrical connector. Ensure vehicle starts in Park and Neutral only.

Lock Washer Tabs�

92G13454

Fig. 126: Installing Neutral Safety Switch Courtesy of Chrysler Corp.

SPEED SENSOR R & I

Removal & Installation

63. Disconnect electrical connector at speed sensor located on
    adapter housing or extension housing. Remove bolt and speed sensor.
    Remove "O" ring from speed sensor.

64. To install, reverse removal procedure using NEW "O" ring.
    Tighten bolt to specification. See TORQUE SPECIFICATIONS.

THROTTLE POSITION SENSOR (TPS) R & I

Removal & Installation

1) Note location of TPS electrical connector. See Fig. 127. Disconnect electrical connector. Remove screws and TPS.

Fig. 127: Identifying TPS Electrical Connector Courtesy of Chrysler Corp.

2) To install, reverse removal procedure. Ensure throttle shaft on throttle body engages socket tangs on TPS. See Fig. 128. Tighten screws. Manually operate throttle and ensure no binding exists. Reinstall electrical connector.

NOTE: TPS must be installed so it can be rotated a few degrees. If TPS cannot be rotated, reinstall TPS with end of throttle

shaft on other side of TPS socket tangs.

Fig. 128: Installing Throttle Position Sensor (TPS) Courtesy of Chrysler Corp.

TRANSMISSION CONTROL MODULE (TCM) R & I

Removal & Installation (Cherokee)

Ensure ignition is off. Disconnect electrical connector from TCM, located behind right side of instrument panel. See Fig. 129. Remove fastener and TCM from instrument panel. To install, reverse removal procedure.

94F38401

Fig. 129: Transmission Control Module Courtesy of Chrysler Corp.

(TCM) I.D. (Cherokee)

Removal

65. Raise and support vehicle. Remove drain plug and drain
    transmission fluid. Remove bolts and oil pan. Remove bolts, oil screen
    and gasket.

66. Disconnect electrical connectors from valve body solenoid.
    Mark electrical connector location for reassembly reference if more
    than one valve body solenoid is being removed. Remove bolt, valve body
    solenoid and "O" ring.

CAUTION: DO NOT allow components to fall from valve body when removing valve body solenoid.

Installation

67. To install, reverse removal procedure using NEW "O" ring
    and NEW gaskets. Tighten valve body solenoid bolt and oil screen bolt
    to specification. See TORQUE SPECIFICATIONS.

68. Ensure magnet is installed in oil pan and does not
    interfere with valve body oil tubes. Apply 1/8" bead of Loctite 599
    sealant on oil pan mounting flange. Install oil pan. Install and
    tighten bolts to specification. See TORQUE SPECIFICATIONS.

69. Install NEW gasket and drain plug. Tighten drain plug to
    specification. See TORQUE SPECIFICATIONS. Fill transmission to proper
    fluid level with Mopar Dexron-IIE/Mercon ATF.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

Application Ft. Lbs. (N.m)

Drain Plug 15 (20)

INCH Lbs. (N.m)

Neutral Safety Switch Adjusting Bolt 108 (12.2)

Neutral Safety Switch Retaining Nut 61 (6.9)

Oil Pan Bolt 65 (7.3)

Oil Screen Bolt 84 (9.5)

Speed Sensor Bolt 65 (7.3)

Valve Body Solenoid Bolt 84 (9.5)