Circuit/System Verification
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, observe the scan tool Rear Defog Relay Cmd parameter while pressing the rear window defogger switch. The parameter should change between On and Off.
- If the value does not change between the commanded states, refer to Rear Window Defogger Switch Malfunction Rear Window Defogger Switch Malfunction.
- Command the Rear Defog Relay ON and OFF with a scan tool. The rear window defogger and rear window defogger indicator should turn ON and OFF when changing between the commanded states.
- If the rear window defogger does not turn ON and OFF when changing between the commanded states, refer to Rear Defogger Malfunction .
- If the Defogger Indicator is always ON or always OFF, refer to Rear Defogger Indicator Malfunction .