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Home >> Jeep >> 2003 >> Grand Cherokee 2WD V8-4.7L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> Vehicle Theft Security System >> Transponder Cyclic Redundancy Check (CRC) Failure

Transponder Cyclic Redundancy Check (CRC) Failure

Test 1 - 5:




Test 6 - 7:






SYMPTOM
TRANSPONDER CYCLIC REDUNDANCY CHECK (CRC) FAILURE

TEST NOTE
This symptom is diagnosed using the test TRANSPONDER COMMUNICATION 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.

POSSIBLE CAUSES
- Checking multiple key operation
- SKIM
- Intermittent wiring harness problem
- Replace ignition key