Chrysler 300M 2002 Service Manual page 2735

SENTRY KEY IMMOBILIZER
Symptom List:
ROLLING CODE FAILURE
VIN MISMATCH
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be ROLLING CODE FAILURE.
When Monitored and Set Condition:
ROLLING CODE FAILURE
When Monitored: At ignition on, after ignition on during any rolling code handshake that
occurs with the PCM due to a SKIM or PCM reset.
Set Condition: When a PCM STATUS message with a Valid Key status is not received by
the SKIM within 3.5 seconds of transmitting the last Valid Key Code message to the PCM.
VIN MISMATCH
When Monitored: With the ignition on.
Set Condition: When the VIN received from the PCM does not match the VIN stored in
the SKIM's EEPROM.
VERIFYING PCM VIN
REPLACE SKIM AND CHECK DTC'S
INTERMITTENT WIRING HARNESS PROBLEM
PCM
TEST
1 With the DRBIII , erase the SKIM DTCs.
Turn the ignition off.
Wait 10 seconds.
Turn the ignition on and wait 2 minutes.
With the DRBIII , read the SKIM DTCs.
Does the DRBIII display the DTC that was previously erased?
Yes → Go To 2
→ Go To 4
No
POSSIBLE CAUSES
ACTION
306
APPLICABILITY
All