Circuit/System Testing

WARNING: This page is about a different car, the 2010 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Refer to SIR Service Precautions .

IMPORTANT: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

Vehicle rollover sensor
SDM module
Vehicle rollover sensor harness connector
SDM wiring harness connector

Ignition OFF, disconnect the harness connector at the rollover sensor and the SDM.
Test for less than 5 ohms between the rollover sensor ground circuit terminal 6 and ground.
- If greater then the specified range, test the ground circuit for an open/high resistance.
Test for greater then 5 ohms between the rollover sensor serial data circuit terminal 5 and ground.
- If less than the specified range, test the serial data circuit for a short to ground.
Ignition ON, test for less than 1 volt between the rollover sensor serial data circuit terminal 5 and ground.
- If greater then the specified range, test the serial data circuit for a short to voltage.
Test for less than 5 ohms between the rollover sensor serial data circuit terminal 5 and the SDM occupant sensor serial data circuit terminal 60.
- If greater then the specified range, test the serial data circuit for an open/high resistance.
Verify that a test lamp illuminates between the ignition 1 circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the ignition circuit for an open/high resistance. If the circuit fuse is open, test the circuit for a short to ground, if the circuit tests normal, replace the rollover sensor.
With a scan tool, clear DTCs. Verify DTC B0090 is not set.
- If the DTC is set, replace the SDM.