Circuit/System Testing

Driver Window Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. Ignition ON, verify that the scan tool Driver Window Main Control Down Switch parameter is Inactive.
   • If not the specified value, test the control circuit terminal 3 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
3. Verify that the scan tool Driver Window Main Control Up Switch parameter is Inactive.
   • If not the specified value, test the control circuit terminal 6 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
4. Verify that the scan tool Driver Window Main Control Express Switch parameter is Inactive.
   • If not the specified value, test the control circuit terminal 2 for a short to ground. If the circuit tests normal, test or replace the M74D window motor-driver.
5. If all circuits test normal, test or replace the S79D window switch-driver.

Passenger Switch Window Malfunction

1. Ignition OFF, disconnect the harness connector at the S79P window switch-passenger.
2. Ignition ON, test for greater than 10V between the signal circuit terminal listed below and ground:
   • Signal circuit terminal 6
   • Signal circuit terminal 7
   • Signal circuit terminal 8
   • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the M74P window motor-passenger.
3. If all circuits test normal, test or replace the S79P window switch-passenger.