SKREEM/SKIM-TRANSPONDER RESPONSE MISMATCH

For a complete wiring diagram Refer to Section 8W.

When Monitored:
At ignition on and during Key Programming Mode.
Set Condition:
When transponder's crypt algorithm results fail to match the SKREEM/SKIM result.

Possible Causes

IGNITION KEY PROGRAMMING

IGNITION KEY

SKREEM/SKIM

Diagnostic Test

1. VERIFY THAT THE DTC IS ACTIVE

Turn the ignition on.
With the scan tool, record and erase SKREEM/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 SKREEM/SKIM DTCs.

Is this DTC active?

Yes

Go To 2

Refer to the Intermittent Condition diagnostic procedure in this Section.

2. VERIFY IF MULTIPLE IGNITION KEYS EXIST

Are there multiple vehicle ignition keys available?

Yes

Go To 3

Go To 4

3. CHECK KEY OPERATION

NOTE: Perform the following steps using one of the vehicle ignition keys. When finished, repeat the procedure using each remaining key, one at a time.

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

Is the DTC present for all ignition keys?

Yes

Replace and program the SKREEM/SKIM in accordance with the Service Information.

Perform SKIS VERIFICATION TEST. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD PROCEDURE).

Replace all ignition keys that cause the DTC to set.
Perform SKIS VERIFICATION TEST. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD PROCEDURE).

4. REPROGRAM THE IGNITION KEYS

With the scan tool, attempt to reprogram the ignition keys to the SKREEM/SKIM.
With the scan tool, erase the SKREEM/SKIM DTCs.
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the scan tool, read the SKREEM/SKIM DTCs.

Did this DTC reset?

Yes

Go To 5

Test Complete.

5. PROGRAM A NEW IGNITION KEY

Replace the existing ignition key with a new key.
With the scan tool, program the new ignition key to the SKREEM/SKIM.
With the scan tool, erase the SKREEM/SKIM DTCs.
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on.
With the scan tool, read the SKREEM/SKIM DTCs.

Did this DTC reset?

Yes

Replace and program the SKREEM/SKIM in accordance with the Service Information.

Perform SKIS VERIFICATION TEST. (Refer to 8 - ELECTRICAL/VEHICLE THEFT SECURITY - STANDARD PROCEDURE).

Test Complete.