Intrusion Transceiver Module (ITM)

B1A3E-SIREN / ITM MISMATCH



- When Monitored:
While the Vehicle Theft and Security System (VTSS) is armed.

- Set Condition:
When the learned Siren information stored in the Intrusion Transceiver Module (ITM) does not match.





1. 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 DTCs.

Does the DTC reset?

Yes

- Inspect the wiring from the ITM to Siren for an intermittent open condition. Check the connector terminals for back out, corrosion or loose terminal contact. If OK, replace the Siren.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 2

2. INTERMITTENT CONDITION
1. Check for any of the follow conditions:
- poor wire to terminal connection
- corroded terminals
- backed out or loose terminals
- broken wire internal to the insulation

Were any problems found?

Yes

- Repair the wiring as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Test complete. The DTC is not active at this time.