Jeep Grand Cherokee WK. Manual — part 351
ELECTRONIC CONTROL MODULES - SERVICE
INFORMATION
TABLE OF CONTENTS
page
page
ELECTRONIC CONTROL MODULES - SERVICE
INFORMATION
STANDARD PROCEDURE
MODULE-ADJUSTABLE PEDALS
. . . . . . . . . . . . . . . . . . . . . . . . 252
ADJUSTABLE PEDALS MODULE (APM)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
. . . . . . . . . . . . . . . . . . . . . . . . 253
MODULE-ANTILOCK BRAKES
. . . . . . . . . . . . . . . . . . . . . . . . 254
. . . . . . . . . . . . . . . . . . . . . . . . . . 254
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
. . . . . . . . . . . . . . . . . . . . . . . . 257
COMMUNICATION
. . . . . . . . . . . . . . . . . . . . . . . . 258
. . . . . . . . . . . . . . . . . . . . . . . . . . 259
CONNECTOR-DATA LINK
. . . . . . . . . . . . . . . . . . . . . . . . 260
. . . . . . . . . . . . . . . . . . . . . . . . . . 260
MODULE-FINAL DRIVE CONTROL
. . . . . . . . . . . . . . . . . . . . . . . . 260
. . . . . . . . . . . . . . . . . . . . . . . . . . 261
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
. . . . . . . . . . . . . . . . . . . . . . . . 264
MODULE-FRONT CONTROL
. . . . . . . . . . . . . . . . . . . . . . . . 265
. . . . . . . . . . . . . . . . . . . . . . . . . . 265
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
. . . . . . . . . . . . . . . . . . . . . . . . 267
MODULE-MEMORY MIRROR
. . . . . . . . . . . . . . . . . . . . . . . . 267
. . . . . . . . . . . . . . . . . . . . . . . . . . 268
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
. . . . . . . . . . . . . . . . . . . . . . . . 269
MODULE-POWERTRAIN CONTROL
POWERTRAIN CONTROL MODULE (PCM)
. . . . . . . . . . . . . . . 270
. . . . . . . . . . . . . . . . . . . . 273
. . . . . . . . . . . . . . . . . . . 273
. . . . . . . . . . . . . . . . . . . . 273
. . . . . . . . . . . . . . . . . . . . 273
POWERTRAIN CONTROL MODULE (PCM)
. . . . . . . . . . . . . . . . . . . . 275
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
. . . . . . . . . . . . . . . . . . . . . . . . 277
MODULE-MEMORY SEAT
. . . . . . . . . . . . . . . . . . . . . . . . 279
. . . . . . . . . . . . . . . . . . . . . . . . . . 279
. . . . . . . . . . . . . . 280
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
. . . . . . . . . . . . . . . . . . . . . . . . 281
MODULE-TRANSMISSION CONTROL
. . . . . . . . . . . . . . . . . . . . . . 282
. . . . . . . . . . . . . . . . . . 283
. . . . . . . . . . . . . . . . . . . . . . 283
. . . . . . . . . . . . . . . . . . 287
QUICK LEARN - 4.7L/5.7L VEHICLES
DRIVE LEARN - 4.7L/5.7L VEHICLES
. . . . . . . . . . . . . . . . . . . . . . 293
. . . . . . . . . . . . . . . . . . 293
. . . . . . . . . . . . . . . . . . . . . . 294
. . . . . . . . . . . . . . . . . . 294
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
STANDARD PROCEDURE
PCM/SKREEM PROGRAMMING
NOTE: Before replacing the PCM, be sure to check the related component/circuit integrity for failures not
detected due to a double fault in the circuit. Most PCM failures are caused by internal component failures
(i.e. relays and solenoids) and shorted circuits (i.e. pull-ups, drivers, and switched circuits). These failures
are difficult to detect when a double fault has occurred and only one Diagnostic Trouble Code (DTC) has
been set.
When a PCM and the SKREEM are replaced at the same time, perform the following steps in order:
1. Program the new PCM.
2. Program the new SKREEM.
3. Replace all ignition keys and program them to the new SKREEM.
PROGRAMMING THE PCM
The SKIS Secret Key is an ID code that is unique to each SKREEM. This code is programmed and stored in the
SKREEM, the PCM, and the ignition key transponder chip(s). When replacing the PCM, it is necessary to program
the secret key into the new PCM using the scan tool. Perform the following steps to program the secret key into the
PCM.
1. Turn the ignition switch to the On position (transmission in Park/Neutral).
2. Use the scan tool and select THEFT ALARM, SKREEM, then MISCELLANEOUS.
3. Select PCM REPLACED (GAS ENGINE).
4. Enter secured access mode by entering the vehicle four-digit PIN.
5. Select ENTER to update PCM VIN.
NOTE: If three attempts are made to enter secure access mode using an incorrect PIN, secured access
mode will be locked out for one hour. To exit this lockout mode, turn the ignition switch to the ON position
for one hour, then enter the correct PIN. (Ensure all accessories are turned off. Also monitor the battery
state and connect a battery charger if necessary).
6. Press ENTER to transfer the secret key (the SKREEM will send the secret key to the PCM).
7. Press Page Back to get to the Select System menu and select ENGINE, MISCELLANEOUS, and SRI MEMORY
CHECK.
8. The scan tool will ask, “Is odometer reading between XX and XX?” Select the YES or NO button on the scan
tool. If NO is selected, the scan tool will read, “Enter Odometer Reading (From I.P. odometer)”. Enter the odom-
eter reading from the instrument cluster and press ENTER.
PROGRAMMING THE SKREEM
1. Turn the ignition switch to the On position (transmission in Park/Neutral).
2. Use the scan tool and select THEFT ALARM, SKREEM, then MISCELLANEOUS.
3. Select PCM REPLACED (GAS ENGINE).
4. Program the vehicle four-digit PIN into SKREEM.
5. Select COUNTRY CODE and enter the correct country.
NOTE: Be sure to enter the correct country code. If the incorrect country code is programmed into
SKREEM, it cannot be changed and the SKREEM must be replaced.
6. Select YES to update VIN (the SKREEM will learn the VIN from the PCM).
7. Press ENTER to transfer the secret key (the PCM will send the secret key to the SKREEM).
8. Program ignition keys to the SKREEM.
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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NOTE: If the PCM and the SKREEM are replaced at the same time, all vehicle ignition keys will need to be
replaced and programmed to the new SKREEM.
PROGRAMMING IGNITION KEYS TO THE SKREEM
1. Turn the ignition switch to the On position (transmission in Park/Neutral).
2. Use the scan tool and select THEFT ALARM, SKREEM, then MISCELLANEOUS.
3. Select PROGRAM IGNITION KEY’S.
4. Enter secured access mode by entering the vehicle four-digit PIN.
NOTE: A maximum of eight keys can be learned to each SKREEM. Once a key is learned to a SKREEM it
(the key) cannot be transferred to another vehicle.
5. Obtain ignition keys to be programmed from the customer (8 keys maximum).
6. Using the scan tool, erase all ignition keys by selecting MISCELLANEOUS, and ERASE ALL CURRENT IGN.
KEYS.
7. Program all of the ignition keys.
If ignition key programming is unsuccessful, the scan tool will display one of the following messages:
•
Programming Not Attempted - The scan tool attempts to read the programmed key status and there are no
keys programmed into SKREEM memory.
•
Programming Key Failed (Possible Used Key From Wrong Vehicle) - SKREEM is unable to program an
ignition key transponder due to one of the following:
− The ignition key transponder is faulty.
− The ignition key transponder is or has been already programmed to another vehicle.
•
8 Keys Already Learned, Programming Not Done - The SKREEM transponder ID memory is full.
•
Learned Key In Ignition - The ID for the ignition key transponder currently in the ignition lock cylinder is
already programmed in SKREEM memory.
MODULE-ADJUSTABLE PEDALS
DESCRIPTION
The Adjustable pedals module (APM) is located under-
neath the driver seat, towards the front and on the
outboard side. It is used in conjunction with the other
modules in the memory system.
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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DIAGNOSIS AND TESTING
ADJUSTABLE PEDALS MODULE (APM)
In order to obtain conclusive testing of the adjustable pedals system, the Controller Area Network (CAN) data bus,
and all of the electronic modules that provide inputs to, or receive outputs from the adjustable pedals system com-
ponents must be checked. Any diagnosis of the adjustable pedals module should begin with, the use of a
scan tool and the appropriate diagnostic service information.
Refer to the appropriate wiring information for complete circuit schematic or connector pin-out information.
Before any testing of the adjustable pedals system is attempted, the battery should be fully-charged.
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove the driver seat cushion/cover (2) (Refer to
23 - BODY/SEATS/SEAT CUSHION COVER -
REMOVAL).
3. Pivot the module upward and disconnect the elec-
trical connectors (1).
4. Unsnap the adjustable pedals module (4) from the
side brackets.
5. Pull the module rearward to remove it from the
front of the seat frame (3).
INSTALLATION
CAUTION: The Adjustable Pedals Module mounting tabs can be damaged during module installation. Use
care to properly align tabs to prevent binding that could result in tab breakage.
1. Place the module (4) into position making sure the
mounting tabs are properly aligned with the front
bracket.
2. Push down on the rear of the module (4) snapping
the retaining clips into place in the side brackets.
3. Connect the adjustable pedals module rear har-
ness connectors (1).
4. Connect the adjustable pedals module front har-
ness connectors.
5. Install the driver seat cushion/cover (2) (Refer to 23
-
BODY/SEATS/SEAT
CUSHION
COVER
-
INSTALLATION).
6. Connect the battery negative cable.
7. Verify system and vehicle operation.
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