2001 CHRYSLER VOYAGER immobilizer

Symptom List:
P1685-SKIM SYSTEM INVALID KEY CODE RECEIVED
P1685-SKIM SYSTEM INVALID SECRET KEY IN EEPROM
P1685-SKIM SYSTEM KEY COMMUNICATION TIMED OUT
P1685-SKIM SYSTEM SKIM ERROR
P1685-SKIM SYSTEM WRITE ACCESS TO EEPROM FAILURE
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P1685-SKIM SYSTEM INVALID
KEY CODE RECEIVED.
When Monitored and Set Condition:
P1685-SKIM SYSTEM SKIM ERROR
When Monitored: With the ignition on and the immobilizer disarmed.
Set Condition: The ECM detects an open, short to ground, or short to voltage on the
immobilizer signal circuit.
P1685-SKIM SYSTEM WRITE ACCESS TO EEPROM FAILURE
When Monitored: With the ignition on.
Set Condition: The ECM determines that the coded message from the PCM does not
match the message programmed into memory.
POSSIBLE CAUSES
SKIM
INTERMITTENT CONDITION
CHECK FOR SKIM COMMUNICATION AND DTCS
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, check for Sentry Key Immobilizer Module communication and DTCs.
Are any SKIS problems or DTCs present?All
Ye s®Refer to symptom list for problems related to SKIM Communica-
tion and DTCs before continuing.
Perform ROAD TEST VERIFICATION - VER-2.
No®Go To 2
168
DRIVEABILITY - DIESEL

POSSIBLE CAUSES
SKIM INTERNAL DTC FAILURE
TEST ACTION APPLICABILITY
1Note: This trouble code indicates an internal SKIM fault.
With the DRBIIIt, read and record the SKIM DTCs and then erase the SKIM DTCs
Perform 10 ignition key cycles, leaving the ignition key on for a minimum of 90
seconds per cycle.
With the DRBIIIt, read the SKIM DTCs.
Did the same SKIM DTC return?All
Ye s®Replace and program the Sentry Key Immobilizer Module in
accordance with the Service Information.
Perform SKIS VERIFICATION.
No®Test Complete.
215
VEHICLE THEFT/SECURITY
ANTENNA FAILURE ÐContinued

TEST ACTION APPLICABILITY
2NOTE: Ensure that a VIN has been programmed into the PCM. If a VIN is not
displayed, attempt to program the PCM with the correct vehicle VIN before
continuing.
Turn the ignition on.
With the DRBIIIt, select Engine system from the main menu.
Display and record the Vehicle Identification Number.
Does the VIN recorded from the PCM match the VIN of the vehicle?All
Ye s®Go To 3
No®Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform SKIS VERIFICATION.
3 Turn the ignition off.
Replace and program the Sentry Key Immobilizer Module in accordance with the
Service Information.
Turn the ignition on.
With the DRBIIIt, display and clear all PCM and SKIM DTC's.
Perform 5 ignition key cycles leaving the ignition key on for 90 seconds per cycle.
With the DRBIIIt, check for SKIM DTC's.
Does the DRBIIItdisplay the same DTC?All
Ye s®Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform SKIS VERIFICATION.
No®Test Complete.
4 Turn the ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?All
Ye s®Repair wiring harness/connectors as necessary.
Perform SKIS VERIFICATION.
No®Test Complete.
219
VEHICLE THEFT/SECURITY
ROLLING CODE FAILURE ÐContinued

TEST ACTION APPLICABILITY
1 With the DRBIIIt, read and record the SKIM DTCs.
With the DRBIIIt, erase the SKIM DTCs.
NOTE: Perform the following test several times to ensure the DTC is
current.
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the DRBIIIt, read the SKIM DTCs.
Does the DRBIIItdisplay the DTC that was previously erased?All
Ye s®Go To 2
No®Go To 7
2 Are there multiple vehicle ignition keys available? All
Ye s®Go To 3
No®Go To 4
3NOTE: Perform the following steps using one of the vehicle ignition keys.
When finished, repeat the procedure using each of the other vehicle keys
one at a time.
With the DRBIIIt, erase the SKIM DTC's.
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the DRBIIIt, read the SKIM DTC's.
Is the DTC present for all ignition keys?All
Ye s®Replace the Sentry Key Immobilizer Module in accordance with
the Service Information.
Perform SKIS VERIFICATION.
No®Test Complete.
4 With the DRBIIIt, attempt to reprogram the ignition keys to the SKIM.
With the DRBIIIt, erase the SKIM DTC's.
Wait 10 seconds.
Turn the ignition on.
With the DRBIIIt, read the SKIM DTC's.
Does the DTC reset?All
Ye s®Go To 5
No®Test Complete.
5 Replace the ignition key with a new key.
With the DRBIIIt, program the new ignition key to the SKIM.
With the DRBIIIt, erase the SKIM DTC's
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the DRBIIIt, read the SKIM DTC's.
Does the DTC reset?All
Ye s®Go To 6
No®Test Complete.
221
VEHICLE THEFT/SECURITY
TRANSPONDER COMMUNICATION FAILURE ÐContinued

TEST ACTION APPLICABILITY
6 If there are no possible causes remaining, view repair. All
Repair
Replace and program the Sentry Key Immobilizer Module in
accordance with the Service Information.
Perform SKIS VERIFICATION.
7 Turn the ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?All
Ye s®Repair wiring harness/connectors as necessary.
Perform SKIS VERIFICATION.
No®Test Complete.
222
VEHICLE THEFT/SECURITY
TRANSPONDER COMMUNICATION FAILURE ÐContinued

Verification Tests
CHARGING VERIFICATION - VER-3 APPLICABILITY
1. Inspect the vehicle to ensure that all engine components are properly installed and
connected. Reassemble and reconnect components as necessary.
2. If the PCM has been replaced, perform step 3. Otherwise, continue with step 4.
3. If the vehicle is equipped with a factory theft alarm, start the engine at least 20 times in
order to be able to activate the alarm system when desired.
4. With the DRB, erase all diagnostic trouble codes (DTCs).
5. Start the engine.
6. Raise the engine speed to 2000 RPM for at least 30 seconds.
7. Allow the engine to idle.
8. Turn the ignition off for 20 seconds.
9. Turn the ignition on.
10. With the DRB, read ECM and PCM DTCs.
11. If this DTC has reset, or another DTC has set, look for any Technical Service Bulletins
(TSBs) that may relate to this condition. Return to the Symptom List if necessary.
12. If the charging system is functioning correctly and there are no DTCs, the repair is now
complete.
Are any DTCs or symptoms remaining?All
Ye s®Repair is not complete, refer to appropriate symptom.
No®Repair is complete.
NO START VERIFICATION - VER-1 APPLICABILITY
1. NOTE: IMPORTANT! If the Engine Control Module, Sentry Key Immobilizer
Module or Powertrain Control Module have been replaced, ensure the programming
procedures for these modules have been performed in accordance with the Service
Information.
2. Inspect the vehicle to ensure that all engine components are properly installed and
connected. Reassemble and reconnect components as necessary.
3. Inspect the engine oil for contamination. If it is contaminated, change the oil and filter.
4. With the DRB, erase all diagnostic trouble codes (DTCs).
5. Turn the ignition off for at least 10 seconds.
6. Attempt to start the engine.
7. If the engine is unable to start, look for any Technical Service Bulletins (TSBs) that may
relate to this condition. Return to the Symptom List if necessary.
8. If the engine starts and continues to run, the repair is now complete.
Are any DTCs or symptoms remaining?All
Ye s®Repair is not complete, refer to appropriate symptom.
No®Repair is complete.
223
VERIFICATION TESTS

RIGHT SPEED CONTROL SWITCH - WHITE 2 WAYCAV CIRCUIT FUNCTION
A V37 20VT/TN (BUILT UP
EXPORT)SPEED CONTROL SWITCH SIGNAL
A V37 20DG/VT (EXCEPT
BUILT-UP-EXPORT)SPEED CONTROL SWITCH SIGNAL
B Z23 20BK/VT RIGHT SPEED CONTROL SWITCH GROUND
SENTRY KEY IMMOBILIZER MODULE - BLACK 6 WAYCAV CIRCUIT FUNCTION
1- -
2 D25 20WT/VT PCI BUS
3- -
4 F20 20PK/WT IGNITION SWITCH OUTPUT (RUN-START)
5 Z120 20BK/WT GROUND
6 A114 20GY/RD FUSED B(+) (I.O.D.)
VEHICLE SPEED SENSOR (MTX/ATX) - BLACK 3 WAYCAV CIRCUIT FUNCTION
1 F888 18BR/PK (2.4L) 8 VOLT SUPPLY
1 F202 18PK/GY (DIESEL) IGNITION SWITCH OUTPUT (RUN-START)
2 K900 18DB/DG (2.4L) SENSOR GROUND
2 K900 20DB/DG (DIESEL) SENSOR GROUND
3 N7 18DB/OR (2.4L) VEHICLE SPEED SENSOR SIGNAL
3 N7 20DB/OR (DIESEL) VEHICLE SPEED SENSOR SIGNAL
WATER IN FUEL SENSOR (DIESEL) - BLACK 2 WAYCAV CIRCUIT FUNCTION
1 F853 20RD WATER IN FUEL SENSOR SIGNAL
2 K900 18RD SENSOR GROUND
C
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244
CONNECTOR PINOUTS

ELECTRONIC CONTROL MODULES
TABLE OF CONTENTS
page page
ELECTRONIC CONTROL MODULES
STANDARD PROCEDURE...................1
PCM/SKIM PROGRAMMING................1
BODY CONTROL MODULE
DESCRIPTION............................2
OPERATION.............................3
REMOVAL...............................3
INSTALLATION............................3
CONTROLLER ANTILOCK BRAKE
DESCRIPTION............................3
OPERATION.............................3
REMOVAL...............................4
INSTALLATION............................4
DATA LINK CONNECTOR
DESCRIPTION............................5
OPERATION.............................5
FRONT CONTROL MODULE
DESCRIPTION............................5
OPERATION.............................5
DIAGNOSIS AND TESTING..................6
FRONT CONTROL MODULE...............6
REMOVAL...............................6
INSTALLATION............................6
MEMORY HEATED SEAT/MIRROR MODULE
REMOVAL...............................7
INSTALLATION............................7
POWER LIFTGATE MODULE
DESCRIPTION............................7
OPERATION.............................7REMOVAL...............................7
INSTALLATION............................8
POWERTRAIN CONTROL MODULE
DESCRIPTION............................8
OPERATION.............................19
STANDARD PROCEDURE..................21
OBTAINING DIAGNOSTIC TROUBLE
CODES...............................21
REMOVAL..............................22
INSTALLATION...........................22
SENTRY KEY IMMOBILIZER MODULE
DESCRIPTION...........................22
OPERATION.............................23
REMOVAL..............................23
INSTALLATION...........................23
SLIDING DOOR CONTROL MODULE
DESCRIPTION...........................23
OPERATION.............................24
REMOVAL..............................24
INSTALLATION...........................24
TRANSMISSION CONTROL MODULE
DESCRIPTION...........................24
OPERATION.............................24
STANDARD PROCEDURE..................27
PINION FACTOR PROCEDURE............27
QUICK LEARN PROCEDURE..............27
TCC BREAK-IN VIEW/RESET PROCEDURE. . . 28
REMOVAL..............................28
INSTALLATION...........................29
ELECTRONIC CONTROL
MODULES
STANDARD PROCEDURE - PCM/SKIM
PROGRAMMING
NOTE: Before replacing the PCM for a failed driver,
control circuit or ground circuit, be sure to check
the related component/circuit integrity for failures
not detected due to a double fault in the circuit.
Most PCM driver/control circuit failures are caused
by internal component failures (i.e. relay and sole-
noids) 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 DTC has set.When a PCM (SBEC) and the SKIM are replaced
at the same time perform the following steps in
order:
(1) Program the new PCM (SBEC)
(2) Program the new SKIM
(3) Replace all ignition keys and program them to
the new SKIM.
PROGRAMMING THE PCM (SBEC)
The SKIS Secret Key is an ID code that is unique
to each SKIM. This code is programmed and stored
in the SKIM, PCM and transponder chip (ignition
keys). When replacing the PCM it is necessary to
program the secret key into the new PCM using the
DRB III. Perform the following steps to program the
secret key into the PCM.
RSELECTRONIC CONTROL MODULES8E-1