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Inclination/Intrusion Sensor Malfunction

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Intrusion/inclination Sensor B+

1

1

--

--

Intrusion/inclination Sensor Disable Indicator Control

2

2

3

-

Intrusion/inclination Sensor Disable Switch Signal

4

4

4

-

Intrusion/inclination Sensor Ground

--

1

--

--

Intrusion/inclination Sensor Disable Switch Ground

-

4

--

--

1. Intrusion/inclination Sensor Inoperative

2. Intrusion/inclination Sensor Indicator Inoperative

3. Intrusion/inclination Sensor Indicator Always On

4. Intrusion/inclination Sensor Indicator Will Not Turn ON and OFF

Circuit/System Description

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.

Reference Information

Schematic Reference

Immobiliser Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  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.
  3. If the indicator does not turn ON and OFF
        Refer to Circuit/System Testing.

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.
  3. 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
  4. 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.
  5. Test for less than 10 Ω between the ground circuit terminal 5 and ground.
  6. 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
  7. Vehicle in Service Mode.
  8. Verify a test lamp illuminates between the B+ circuit terminal 3 and ground.
  9. 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
  10. Test for less than 1 V between the signal circuit terminal 1 and ground.
  11. 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
  12. Vehicle OFF.
  13. Test for infinite resistance between the signal circuit terminal 1 and ground.
  14. 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
  15. Test for less than 10 Ω between the signal circuit terminal 1 and ground with the intrusion/inclination sensor switch pressed.
  16. 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
  17. Vehicle in Service Mode.
  18. Verify the intrusion/inclination sensor indicator is not illuminated.
  19. If the indicator is illuminated
        Repair the short to voltage in the circuit.
    ⇓   If the indicator is not illuminated
  20. Install a 3 A fused jumper wire between the control circuit terminal 2 and B+.
  21. Verify the intrusion/inclination sensor indicator is illuminated.
  22. 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
  23. Vehicle OFF, disconnect the X6 harness connector at the K9 BCM, vehicle in Service Mode.
  24. Test for less than 1 V between the serial data circuit terminal 16 X2 and ground.
  25. If 1 V or greater
        Repair the short to voltage in the circuit.
    ⇓   If less than 1 V
  26. Test for infinite resistance between the serial data circuit terminal 16 X2 and ground.
  27. If less than infinite resistance
        Repair the short to ground in the circuit.
    ⇓   If infinite resistance
  28. 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.
  29. If 2 Ω or greater
        Repair the open/high resistance in the circuit.
    ⇓   If less than 2 Ω
  30. Test or replace the B67 ultrasonic intrusion sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, programming and setup

   


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