Vauxhall Workshop Service and Repair Manuals

Hood Ajar Indicator/Message Malfunction

Diagnostic Instructions

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) monitors the voltage input of the hood ajar switch signal circuit.

Reference Information

Schematic Reference

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

Circuit/System Verification

Ignition ON, observe the scan tool BCM Hood Position parameter. With the hood open, the Hood Position parameter should read open. With the hood closed, the Hood Position parameter should read closed.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B55 Hood Ajar Switch.
2. Ignition OFF, test for less than 8 Ω between the ground circuit terminal C and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, test for greater 11 V between the signal circuit terminal B and ground.

⇒	If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the B55 Hood Ajar Switch.

4. If all circuits test normal, test or replace the K9 Body Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.