No Response From ITM (Intrusion Transceiver Module)

NO RESPONSE FROM ITM (INTRUSION TRANSCEIVER MODULE)

No Response From ITM (Intrusion Transceiver Module):

POSSIBLE CAUSES
- (A415) Fused B (+) circuit open or shorted
- (Z902) Ground circuit open
- (D55) and (D54) CAN B BUS circuits open
- Intrusion transceiver module

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.

Q: 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. (A415) 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 (A415) Fused B(+) circuit.

Q: Does the test light illuminate brightly?

YES: Go To 3
NO: Repair the (A415) Fused B(+) circuit for an open or short. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test




3. (Z902) GROUND CIRCUIT OPEN

Using a 12-volt test light connected to 12-volts, check the (Z902) ground circuit.

Q: Does the test light illuminate brightly?

YES: Go To 4
NO: Repair the (Z902) ground circuit for an open. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test




4. (D55) AND (D54) CAN B BUS CIRCUITS OPEN

NOTE: One open circuit will not cause this condition.

Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.
Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.

Q: Is there any voltage present on either circuit?

YES: Replace the Intrusion Transceiver Module. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (D55) and (D54) CAN B Bus circuits for an open.
Inspect the connector for damage. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test