U02A5-00-LOST COMMUNICATION WITH CARGO AREA INTRUSION SENSOR

For a complete wiring diagram, refer to the Wiring Information.

When Monitored:
Continuously while the Vehicle Theft and Security System (VTSS) is armed.
Set Condition:
If the Intrusion Transceiver Module (ITM) does not receive messages from the Intrusion Sensor over the LIN bus.

Possible Causes
(A412) FUSED B+ CIRCUIT OPEN
(Z910) GROUND CIRCUIT OPEN
(D121) LIN BUS CIRCUIT OPEN
CARGO AREA INTRUSION SENSOR
INTRUSION TRANSCEIVER MODULE (ITM)

1. CHECK FOR AN ACTIVE DTC

1.	Turn the ignition off.

2.	Arm the VTSS and wait one minute.

3.	Disarm the VTSS and turn the ignition on.

4.	Using the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

2. (A412) FUSED B+ CIRCUIT OPEN

1.	Turn the ignition off.

2.	Disconnect the Cargo Area Intrusion Sensor harness connector.

3.	Using a volt meter, measure the voltage of the (A412) Fused B(+) circuit.

Is the voltage above 10 volts?

Yes

Repair the (A412) Fused B+ circuit for an open. Inspect the related fuse. If the fuse is open, check the circuit for a short to ground.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

3. (Z910) GROUND CIRCUIT OPEN

1.	Using an Ohm meter, measure the resistance between ground and the (Z910) Ground circuit.

Is the resistance above 5.0 Ohms?

Yes

4. LIN BUS VOLTAGE

1.	Using a volt meter, measure the voltage of the (D121) LIN Bus circuit at the Intrusion Sensor harness connector with the ignition first on and then off.

2.	Observe the voltage displayed on the voltmeter.

Is the voltage between 1 and 12 volts?

Yes

Replace the Intrusion Sensor in accordance with the Service Information.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

5. (D121) LIN BUS CIRCUIT OPEN

1.	Disconnect the ITM harness connector.

2.	Using an Ohm meter, measure the resistance of the (D121) LIN Bus circuit.

Is the resistance above 5.0 Ohms?

Yes