U110D-LOST COMMUNICATION WITH SECURITY SIREN

For a complete wiring diagram Refer to Section 8W

• When Monitored:

  Continuously while the VTSS is armed.

• Set Condition:

  If the Intrusion Transceiver Module does not receive messages from the Siren.

Diagnostic Test

• Go To2

• The condition that caused this symptom is currently not present. Inspect the related wiring harness for a possible intermittent condition. Look for any chafed, pierced, pinched or partially broken wires.
• Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Go To3

• Repair the (A114) Fused B+ circuit for an open.
• Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Go To4

• Repair the (Z387) Ground circuit for an open.
• Perform BODY VERIFICATION TEST - 1A. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Connect a known good siren and try to reset the DTC. If the DTC does not reset the original siren needs to be replaced. If the DTC does reset replace the ITM.
• Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Go To5

• Repair the (D96) Siren Signal Control circuit for a short to voltage. Perform BODY VERIFICATION TEST - 1A. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Go To6

• Go To7

• Repair the (D96) Siren Signal Control circuit for a short to ground.
• Perform BODY VERIFICATION TEST - 1A. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Replace the Intrusion Transceiver Module in accordance with the Service Information.
• Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

• Repair the (D96) Siren Signal Control circuit for an open.
• Perform BODY VERIFICATION TEST - 1A. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)