Intrusion Transceiver Module (ITM)

B1A20-PRE-ARM TIME-OUT



- When Monitored:
During the Vehicle Theft and Security System (VTSS) pre-arm process.

- Set Condition:
If the VTSS pre-arm sequence is interrupted within 16 seconds after securing the vehicle.





DETERMINE IF DIAGNOSTIC TROUBLE CODE (DTC) IS CURRENT

NOTE: Diagnose any related Communication DTCs before continuing.

1. With a scan tool, read and record DTCs.
2. With the scan tool, clear DTCs.
3. Turn the ignition off and remove the key from the ignition.
4. Lock and close all doors to allow the VTSS to go from pre-arm to armed status and wait one minute.
5. Disarm the VTSS.
6. With the scan tool, read ITM DTCs.

Does the DTC reset?

Yes

- Remove the Cluster/CCN and inspect the Fused B (+) and both CAN Interior Bus circuits for spread terminals, corrosion or intermittent opens.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Test complete. The DTC is not active at this time.
- Perform the BODY VERIFICATION TEST. Body Verification Test.