Heated Glass Element: Testing and Inspection

REAR WINDOW DEFOGGER DIAGNOSIS
The rear window defogger is controlled by the A/C-ECU. For troubleshooting, refer to Manual A/C Diagnosis.









Printed-Heated Lines Check
1. Run engine at 2,000 r/min. Check heater element with battery at full.
2. Turn "ON" rear window defogger switch. Measure heater element voltage with circuit tester at rear window glass centre A. Condition is good if it indicates about six volts.
3. If 12 volts is indicated at A, there is a break in the negative terminals from A. Move test bar slowly to negative terminal to detect where voltage changes suddenly (0 volts).
4. If 0 volts is indicated at A, there is a break in the positive terminals from A. Defect where the voltage changes suddenly (12 volts) in the same method described above.