Transponder Cyclic Redundancy Check (CRC) Failure

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.

POSSIBLE CAUSES
- Ignition key
- SKIM

Diagnostic Test

1. ACTIVE DTC
With the scan tool, read and record the SKIM DTCs.
With the scan tool, erase the SKIM DTCs.

NOTE: Perform the following test several times to make sure the DTC is current.

Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the scan tool, read the SKIM DTCs.

Q: Is the DTC active at this time?

YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform SKIS VERIFICATION. SKIS Verification

2. AVAILABILITY OF MULTIPLE KEYS

Q: Are there multiple vehicle ignition keys available?

YES: Go To 3
NO: Go To 4

3. CHECKING KEY OPERATION

NOTE: 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 scan tool, erase the SKIM DTCs.
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the scan tool, read the SKIM DTCs.

Q: Is the DTC present for all ignition keys?

YES: Replace and program the Sentry Key Immobilizer Module. Perform SKIS VERIFICATION. SKIS Verification
NO: Replace the ignition key(s) that cause the SKIM DTC. Perform SKIS VERIFICATION. SKIS Verification

4. REPROGRAM KEYS
With the scan tool, attempt to reprogram the ignition keys to the SKIM.
With the scan tool, erase the SKIM DTCs.
Wait 10 seconds.
Turn the ignition on.
With the scan tool, read the SKIM DTCs.

Q: Does the DTC set again?

YES: Go To 5
NO: Test Complete.

5. PROGRAM NEW IGNITION KEY
Replace the ignition key with a new key.
With the scan tool, program the new ignition key to the SKIM.
With the scan tool, erase the SKIM DTCs.
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the scan tool, read the SKIM DTCs.

Q: Does the DTC set again?

YES: Go To 6
NO: Test Complete.

6. SKIM
If there are no possible causes remaining, view repair.

Repair
Replace and program the Sentry Key Immobilizer Module. SKIS Verification