U1170

U1170-LOST COMMUNICATION WITH INTRUSION SENSOR 2







- 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 Rear Intrusion Sensor over the LIN bus.





1. INTERMITTENT DTC
1. With the scan tool, erase the current Intrusion Transceiver Module DTCs.
2. Turn the ignition off.
3. Arm the VTSS and wait 1 minute.
4. Disarm the VTSS and turn the ignition on.
5. Using the scan tool, read ITM DTCs.

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 the BODY VERIFICATION TEST. Body Verification Test

2. (D86) MICROWAVE SELECT JUMPER OPEN




1. Disconnect the Rear Intrusion Sensor connector.
2. Measure the resistance of the (D86) Microwave Select Jumper at the Rear Intrusion Sensor connector.

Is the resistance below 1.0 ohm?

Yes

- Go To 3

No

- Repair the (D86) Microwave Select Jumper for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test

3. (A415) FUSED B+ OPEN




1. Using a 12-volt test light connected to ground, check the (A415) Fused B(+) circuit in the Rear Intrusion Sensor connector.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (A415) Fused B+ circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test

4. (Z907) GROUND CIRCUIT OPEN




1. Using a 12-volt test light connected to 12-volts, check the (Z907) Ground circuit at the Front Intrusion Sensor connector.

Does the test light illuminate brightly?

Yes

- Go To 5

No

- Repair the (Z907) Ground circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test

5. LIN BUS VOLTAGE




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

Is the voltage between 1 and 12 volts?

Yes

- Replace the Rear Intrusion Sensor.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Go To 6

6. (D122) LIN BUS CIRCUIT OPEN




1. Disconnect the Intrusion Transceiver Module harness connector.
2. Measure the resistance of the (D122) LIN Bus circuit between the Intrusion Transceiver Module and the Intrusion Sensor connector.

Is the resistance below 3.0 ohms?

Yes

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

No

- Repair the (D122) LIN Bus circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test