U1169

U1169

LOST COMMUNICATION WITH INTRUSION SENSOR 1

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 Cargo Intrusion Sensor over the LIN bus.
Possible Causes
INTERMITTENT CONDITION
(A412) FUSED B+ CIRCUIT OPEN
(Z912) GROUND CIRCUIT OPEN
(D122) LIN BUS CIRCUIT OPEN
CARGO INTRUSION SENSOR
INTRUSION TRANSCEIVER MODULE

Diagnostic Test

1. INTERMITTENT DTC

With the scan tool, erase the current Intrusion Transceiver Module DTC’s.
Turn the ignition off.
Arm the VTSS and wait 1 minute.
Disarm the VTSS and turn the ignition on.
Using the scan tool, read ITM DTC(s).
Does the scan tool display the same DTC?

Yes

  • Go To 2

No

  • 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)

 



2. (A412) FUSED B+ OPEN
Disconnect the Cargo Intrusion Sensor connector.
Using a 12-volt test light connected to ground, check the (A412) Fused B(+) circuit in the Intrusion Sensor connector.

Does the test light illuminate brightly?

Yes

  • Go To 3
    No
  • Repair the (A412) Fused B+ circuit for an open.
  • Perform BODY VERIFICATION TEST – VER 1.

3. (Z912) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check the (Z912) Ground circuit at the Intrusion Sensor connector.

Does the test light illuminate brightly?

Yes

  • Go To 4

No

  • Repair the (Z912) Ground circuit for an open.

 

  • Perform BODY VERIFICATION TEST – VER 1.(Refer to 8 – ELECTRICAL/ELECTRONIC CONTROL MODULES – STANDARD PROCEDURE)

 



4. LIN BUS VOLTAGE

The Cargo Intrusion Sensor connector is disconnected.
Measure the voltage of the (D122) LIN Bus circuit at the Intrusion Sensor connector with the key on and off.
Observe the voltage displayed on the voltmeter.

Is the voltage between 1 and 12 volts?

Yes

  • Replace the Front Intrusion Sensor in accordance with the Service Information.
  • Perform BODY VERIFICATION TEST – VER 1.

No

  • Go To 5

5. (D122) LIN BUS CIRCUIT OPEN

Disconnect the Intrusion Transceiver Module harness connector.
Measure the resistance of the (D122) LIN Bus circuit between the Intrusion Transceiver Module and the Cargo Intrusion Sensor connector.
Is the resistance below 3.0 ohms?

Yes

  • Replace the Intrusion Transceiver Module in accordance with the Service Information.
  • Perform BODY VERIFICATION TEST – VER 1.

No

  • Repair the (D122) LIN Bus circuit for an open.
  • Perform BODY VERIFICATION TEST – VER 1.
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