Circuit/System Verification

Command the rear window defogger ON and OFF with the scan tool. The rear window defogger and 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 does not illuminate or continuously illuminates, refer to Rear Defogger Indicator Malfunction (C60 A/C system). => If the indicator does not change between the commanded states, replace HVAC control module (C68 A/C System).