No Response From ITM (Intrusion Transceiver Module)

*NO RESPONSE FROM ITM (INTRUSION TRANSCEIVER MODULE)





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL .






Diagnostic Test


1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU View.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool display a red X next to the module?

Yes


- Go To 2


No


- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.


2. (A412) FUSED B(+) CIRCUIT OPEN OR SHORTED




Turn the ignition off.
Disconnect the Intrusion Transceiver Module harness connector.
Using a 12-volt test light connected to ground, check the (A412) Fused B(+) circuit.
Does the test light illuminate brightly?

Yes


- Go To 3


No


- Repair the (A412) Fused B(+) circuit for an open or short.
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.


3. (Z905) GROUND CIRCUIT OPEN




Using a 12-volt test light connected to 12-volts, check the (Z905) ground circuit.
Does the test light illuminate brightly for each circuit?

Yes


- Go To 4


No


- Repair the (Z905) ground circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.


4. (D265) OR (D264) CAN INTERIOR BUS (125K) CIRCUIT OPEN




Measure the resistance of the (D264) CAN Interior Bus (-) (125K) circuit between the TIPM C7 harness connector and the Intrusion Transceiver Module harness connector.
Measure the resistance of the (D265) CAN Interior Bus (+) (125K) circuit between the TIPM C7 harness connector and the Intrusion Transceiver Module harness connector.
Is resistance below 5.0 ohms on both circuits?

Yes


- Replace the Intrusion Transceiver Module.
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.


No


- Repair the (D265) or (D264) CAN Interior Bus (125K) circuit for an open. Inspect the connector for damage.
- Perform the BODY VERIFICATION TEST - VER 1.Body Verification Test.