Volt

Inclination/Intrusion Sensor Malfunction

The content theft deterrent intrusion/inclination sensor is a multifunction sensor which detects motion inside the vehicle (intrusion), as well as change in the vehicle level (inclination). The intrusion/inclination sensor is supplied power and ground for operation and communicates with the body control module (BCM) via a dedicated LAN circuit. The sensor may be turned on or off using the disable switch and will display its status through the status LED.

Schematic Reference

Immobiliser Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode.
2. Verify the intrusion sensor disable indicator turn ON and OFF when pressing and releasing the intrusion/inclination sensor disable switch.

⇒	If the indicator does not turn ON and OFF

Refer to Circuit/System Testing.

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the S48B multi-function switch - overhead console. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.

⇒	If 10 Ω or greater

2.1.	Vehicle OFF

2.2.	Test for less than 2 Ω in the ground circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, repair the open/high resistance in the ground connection.

⇓	If less than 10 Ω

3. Connect the harness connector at the S48B multi-function switch - overhead console. Disconnect the harness connector at the B67 ultrasonic intrusion sensor. It may take up to 2 minutes for all vehicle systems to power down.
4. Test for less than 10 Ω between the ground circuit terminal 5 and ground.

⇒	If 10 Ω or greater

4.1.	Vehicle OFF

4.2.	Test for less than 2 Ω in the ground circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, repair the open/high resistance in the ground connection.

⇓	If less than 10 Ω

5. Vehicle in Service Mode.
6. Verify a test lamp illuminates between the B+ circuit terminal 3 and ground.

⇒	If the test lamp does not illuminate and the circuit fuse is good

6.1.	Vehicle OFF.

6.2.	Test for less than 2 Ω in the B+ circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

⇒	If the test lamp does not illuminate and the circuit fuse is open

6.1.	Vehicle OFF.

6.2.	Test for infinite resistance between the B+ circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

⇒	If infinite resistance, replace the B67 ultrasonic intrusion sensor.

⇓	If the test lamp illuminates

7. Test for less than 1 V between the signal circuit terminal 1 and ground.

⇒	If 1 V or greater

7.1.	Vehicle OFF, disconnect the harness connector at the S48B multi-function switch - overhead console, vehicle in Service Mode.

7.2.	Test for less than 1 V between the signal circuit and ground.

⇒	If 1 V or greater, repair the short to voltage in the circuit.

⇒	If less than 1 V, replace the S48B multi-function switch - overhead console.

⇓	If less than 1 V

8. Vehicle OFF.
9. Test for infinite resistance between the signal circuit terminal 1 and ground.

⇒	If less than infinite resistance

9.1.	Vehicle OFF, disconnect the harness connector at the S48B multi-function switch - overhead console.

9.2.	Test for infinite resistance between the signal circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

⇒	If infinite resistance, replace the S48B multi-function switch - overhead console.

⇓	If infinite resistance

10. Test for less than 10 Ω between the signal circuit terminal 1 and ground with the intrusion/inclination sensor switch pressed.

⇒	If 10 Ω or greater

10.1.

Vehicle OFF, disconnect the harness connector at the S48B multi-function switch - overhead console.

10.2.

Test for less than 2 Ω in the signal circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, replace the S48B multi-function switch - overhead console.

⇓	If less than 10 Ω

11. Vehicle in Service Mode.
12. Verify the intrusion/inclination sensor indicator is not illuminated.

⇒	If the indicator is illuminated

Repair the short to voltage in the circuit.

⇓	If the indicator is not illuminated

13. Install a 3 A fused jumper wire between the control circuit terminal 2 and B+.
14. Verify the intrusion/inclination sensor indicator is illuminated.

⇒	If the indicator is not illuminated

14.1.

Vehicle OFF, disconnect the harness connector at the S48B multi-function switch - overhead console.

14.2.

Test for infinite resistance between the signal circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

⇓	If infinite resistance.

14.3.

Test for less than 2 Ω in the signal circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, replace the S48B multi-function switch - overhead console.

⇓	If the indicator is illuminated

15. Vehicle OFF, disconnect the X6 harness connector at the K9 BCM, vehicle in Service Mode.
16. Test for less than 1 V between the serial data circuit terminal 16 X2 and ground.

⇒	If 1 V or greater

Repair the short to voltage in the circuit.

⇓	If less than 1 V

17. Test for infinite resistance between the serial data circuit terminal 16 X2 and ground.

⇒	If less than infinite resistance

Repair the short to ground in the circuit.

⇓	If infinite resistance

18. Test for less than 2 Ω between the serial data circuit terminal 16 at the K9 BCM X2 harness connector and the serial data circuit terminal 4 at the B67 ultrasonic intrusion sensor.

⇒	If 2 Ω or greater

Repair the open/high resistance in the circuit.

⇓	If less than 2 Ω

19. Test or replace the B67 ultrasonic intrusion sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, programming and setup