Circuit/System Testing
WARNING: This page is about a different car, the 2007 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Refer to SIR Caution
.
IMPORTANT:
Repair any brake system related symptoms and DTCs before performing this diagnostic.
Disable the inflatable restraint steering wheel module when performing this diagnostic. Refer to SIR Disabling and Enabling .
- Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
- Disconnect the harness connector at the steering wheel controls - left.
- Ignition ON, measure for B+ at the EPS/STR WHL CNTRL supply voltage circuit.
- If less than the specified value, check for a short to ground or an open/high resistance on the EPS/STR WHL CNTRL supply voltage circuit.
- Ignition OFF, disconnect the harness connector C2 of the BCM.
- Install a fused jumper at the harness connector of the steering wheel controls switch - left between the EPS/STR WHL CNTRL supply voltage circuit terminal 4 and the cruise control switch signal circuit terminal 6.
- Ignition ON, verify that a test lamp illuminates at the harness connector of the BCM C2 between the cruise control switch signal circuit terminal 61 and ground.
- If the test lamp does not illuminate, test the cruise control switch signal circuit for a short to ground or an open/high resistance.
- Ignition OFF, disconnect the fused jumper.
- Ignition OFF, verify that the test lamp does not illuminate at the harness connector of the BCM C2 between the cruise control switch signal circuit terminal 61 and ground.
- If the test lamp illuminates, test the cruise control switch signal circuit for a short to voltage.
- If the circuits test normal, test the component. If the component tests normal, replace the BCM.