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Troubleshooting Hints

Malformation of the A/C-ECU

STEP 1. Check the performance of the defogger timer operations.
1. Ignition switch: ON.
  Defogger switch: ON (operate for approx. 11 minutes)
Q: Does the defogger timer function work normally?
1. YES : Intermittent malfunction
2. NO : Replace the A/C-ECU. Check that the defogger timer function works normally.