Circuit/System Verification

Engine running
Verify the E18 Rear Defogger Grid turns ON and OFF when commanding the Rear Defogger On and Off with a scan tool
- If the E18 Rear Defogger Grid does not turn ON or OFF
  Refer to Rear Window Defogger Malfunction .
- Go to next step: If the E18 Rear Defogger Grid turns ON and OFF
Verify the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm when commanding the Rear Defogger On with a scan tool.
- If the E17D Outside Rearview Mirror Glass-Driver or E17P Outside Rearview Mirror Glass-Passenger do not become warm
  Refer to Circuit/System Testing - Single Outside Mirror Defogger Inoperative.
- If both E17D Outside Rearview Mirror Glass-Driver and E17P Outside Rearview Mirror Glass-Passenger never become warm or are always warm
  Refer to Circuit/System Testing - Both Outside Mirrors Defogger Malfunction.
- Go to next step: If both the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm
All OK.