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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-19 STEP 4. Check the wiring harness between A/C-ECU • Check the AC control panel signal line for open and short circuit. Q: Is the wiring harness between A/C-ECU connector C-109 (terminal 9) and A/C control panel connector STEP 5. Recheck for diagnostic trouble code. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . NO : Replace the A/C control panel. Then go to Step 6. STEP 6. Recheck for diagnostic trouble code. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . NO : Replace the A/C-ECU. |