Circuit/System Verification

Vehicle ON.
Verify that there are no communications DTCs set.
- If any communication DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no communication DTCs are set
Verify that DTC B371A is not set.
- If DTC B371A is set
  Refer to DTC B371A .
- If DTC B371A is not set
Verify the scan tool Windshield Wiper High Speed Switch parameter changes between Active and Inactive when activating the high speed windshield wipers.
- If the parameter does not change
  Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
- If the parameter changes
Verify the scan tool Windshield Wiper Switch parameter changes between Off and Low when activating the low speed windshield wipers.
- If the parameter does not change
  Refer to Circuit/System Testing - Windshield Wiper/Washer Switch Malfunction.
- If the parameter changes
Verify the scan tool Windshield Wiper Switch parameter changes between Delay 1 and Delay 5 when cycling the intermittent speed windshield wipers.
- If the parameter does not change
  Test or replace the S82 Windsheild Wiper/Washer Switch.
- If the parameter changes
Verify the M75 Windshield Wiper Motor changes between Off, Low, and High when cycling the S82 Windshield Wiper/Washer Switch between Off, Low, and High.
- If the M75 Windshield Wiper Motor does not cycle between Off, Low, and High
  Refer to Circuit/System Testing - Windshield Wiper Motor Malfunction
- If the M75 Windshield Wiper Motor cycles between Off, Low, and High
All OK.