B1A3D-00-SIREN BATTERY TAMPER / LOSS OF POWER SUPPLY

For a complete wiring diagram, refer to the Wiring Information.

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 will set.

Possible Causes
HARNESS TAMPERING / INTERMITTENT CONDITION
(A412) FUSED B(+) CIRCUIT
(Z905) GROUND OPEN
SIREN

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

2. CHECK FOR AN ACTIVE DTC

1.	Turn the ignition off and remove the key from the ignition.

2.	Lock and close all doors to allow the VTSS to go from pre-arm to armed status and wait one minute.

3.	Disarm the VTSS.

4.	Turn the ignition on.

5.	With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

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

1.	Turn the ignition off.

2.	Disconnect the Siren connector.

3.	Using a 12-volt test light connected to ground, check the (A412) Fused B(+) circuit at the siren connector.

Does the test light illuminate brightly?

Yes

Repair the (A412) Fused B(+) circuit for an open. Inspect the related fuse. If the fuse is open, check the circuit for a short to ground.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

4. CHECK THE (Z905) GROUND CIRCUIT AT THE SIREN

1.	Using a 12-volt test light connected to 12-volts, check the (Z905) Ground circuit at the siren connector.

Does the test light illuminate brightly?

Yes

Replace the Siren in accordance with the Service Information.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).