DaimlerChrysler Jeep Grand Cherokee 2002, Service Manual

Page: 211 / 284

Symptom:
P1685-SKIM SYSTEM KEY COMMUNICATION TIMED OUT
When Monitored and Set Condition:
P1685-SKIM SYSTEM KEY COMMUNICATION TIMED OUT
When Monitored: With the ignition on.
Set Condition: Communication between the ECM and the SKIM is not completed within
2.0 seconds
POSSIBLE CAUSES
SKIM
INTERMITTENT CONDITION
CHECK FOR SKIM COMMUNICATION AND DTCS
ENGINE CONTROL MODULE
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
Yes
→
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
2 Turn the ignition on.
With the DRBIII
t
, erase ECM DTCs.
Turn the ignition on and off several times pausing 10 seconds between each key cycle.
With the DRBIII
t
, read the ECM DTCs.
Are any P1685 DTCs present?
All
Yes
→
Go To 3
No
→
Go To 4
3 Replace and program the SKIM in accordance with the Service Information.
Turn the ignition on.
With the DRBIII
t
, erase ECM DTCs.
Turn the ignition on and off several times pausing for 10 seconds between key cycles.
With the DRBIII
t
, read ECM DTCs.
Are there any P1685 DTCs present?
All
Yes
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
The test is complete.
Perform ROAD TEST VERIFICATION - VER-2.
203
DRIVEABILITY - DIESEL
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