Transponder Communication Failure; Transponder Cyclic Redundancy Check (Crc) Failure; Transponder Id Mismatch; Transponder Response Mismatch - DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual

Symptom List:

TRANSPONDER COMMUNICATION FAILURE

TRANSPONDER CYCLIC REDUNDANCY CHECK (CRC) FAILURE

TRANSPONDER ID MISMATCH

TRANSPONDER RESPONSE MISMATCH

Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be TRANSPONDER COMMUNICA-
TION FAILURE.
When Monitored and Set Condition:
TRANSPONDER COMMUNICATION FAILURE
When Monitored: At ignition on and during Key Programming Mode.
Set Condition: When the SKIM does not receive a transponder response after 8 consec-
utive transponder read attempts within 2.0 seconds.
TRANSPONDER CYCLIC REDUNDANCY CHECK (CRC) FAILURE
When Monitored: At ignition on and during Key Programming Mode.
Set Condition: When 5 consecutive transponder signal transmissions are sent to the
SKIM with the correct message format but with invalid data.
TRANSPONDER ID MISMATCH
When Monitored: At ignition on and during Key Programming Mode.
Set Condition: When the transponder ID read by the SKIM does not match any of the
transponder ID's stored in the SKIM's memory.
TRANSPONDER RESPONSE MISMATCH
When Monitored: At ignition on and during Key Programming Mode.
Set Condition: When the transponder's crypto algorithm result fails to match the SKIM's
result.
CHECKING MULTIPLE KEY OPERATION
SKIM
INTERMITTENT WIRING HARNESS PROBLEM
REPLACE IGNITION KEY
SENTRY KEY IMMOBILIZER
POSSIBLE CAUSES
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