No Response From ITM (Intrusion Transceiver Module)
NO RESPONSE FROM INTRUSION TRANSCEIVER MODULENo Response From Intrusion Transceiver Module:
POSSIBLE CAUSES
- (Z18) ground circuit open
- (A908) fused B(+) circuit open
- (D25) PCI BUS circuit 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. (Z18) GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the Intrusion Transceiver Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the (Z18) ground circuit.
Q: Does the test light illuminate brightly?
YES: Go To 3
NO: Repair the (Z18) Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
3. (A908) FUSED B(+) CIRCUIT OPEN
Using a 12-volt test light connected to ground, probe the (A908) Fused B(+) circuit.
Q: Does the test light illuminate brightly?
YES: Go To 4
NO: Repair the (A908) Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
4. (D25) PCI BUS CIRCUIT OPEN
Turn the ignition off.
Disconnect the scan tool from the DLC connector.
Measure the resistance of the (D25) PCI Bus circuit between the DLC and the Intrusion Transceiver Module connector.
Q: Is the resistance below 5.0 ohms?
YES: Replace the Intrusion Transceiver Module.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the (D25) PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test