Circuit/System Testing
WARNING: This page is about a different car, the 2008 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Refer to SIR Caution
.
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 of the cruise control switch.
- Ignition ON, measure for 10 volts or greater between the steering wheel switch harness terminal 1 and ground.
- If less than 10 volts, test for an open/high resistance or a short to ground on the cruise control supply voltage circuit.
- Ignition OFF, disconnect the harness connector X1 at the BCM.
- Test for 1.0 ohm or less resistance between the cruise control switch harness terminal 3 and the BCM X1 connector terminal 3.
- If greater than the specified range, test the cruise control switch signal circuit for an open/high resistance.
- Test for infinite resistance between the cruise control switch harness terminal 3 and ground.
- If less than the specified range, test the cruise control switch signal circuit for a short to ground.
- Ignition ON, test for 0 volts between the cruise control switch harness terminal 3 and ground.
- If greater than the specified value, test the cruise control switch signal circuit for a short to voltage.
- If all circuits test normal, test the component. If the component tests normal, replace the BCM.