Intrusion Transceiver Module (ITM)

B1A3D-SIREN BATTERY TAMPER / LOSS OF POWER SUPPLY



- When Monitored:
Continuously with the Vehicle Theft and Security System (VTSS) armed.

- Set Condition:
If the Intrusion Transceiver Module (ITM) detects incorrect voltage at the Siren this code sets.





1. INSPECT SIREN HARNESS
1. Inspect the wiring harness to the Siren for any signs of tampering or intermittent condition.

Were there any problems found?

Yes

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

No

- Go To 2

2. DETERMINE IF DIAGNOSTIC TROUBLE CODE (DTC) IS CURRENT
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

- Go To 3

No

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

3. CHECK THE (A412) FUSED B(+) CIRCUIT AT THE SIREN




1. Turn the ignition off.
2. Disconnect the Siren harness connector.
3. Using a 12-volt test light connected to ground, check the (A412) Fused B(+) circuit at the Siren harness connector.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the open in the (A412) Fused B(+) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (Z901) GROUND CIRCUIT AT THE SIREN




1. Using a 12-volt test light connected to 12-volts, check the (Z901) Ground circuit at the Siren harness connector.

Does the test light illuminate brightly?

Yes

- Replace the Siren.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the open in the (Z901) Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.