NO.11 DUAL A/C CONTROL DOES NOT OPERATE

id070300801500

11 | Dual A/C control function does not operate
DESCRIPTION | • Malfunction in A/C unit and/or front climate control unit dual A/C control system • Driver or passenger-side temperature control dial does not operate individually.
POSSIBLE CAUSE | • Driver-side air mix door malfunction (stuck) • Passenger-side air mix door malfunction (stuck) • driver-side front air mix actuator malfunction • Passenger-side front air mix actuator malfunction • Driver-side front air mix actuator position sensor malfunction • Passenger-side front air mix actuator position sensor malfunction • Open, short circuit in wiring or poor connection between front climate control unit and driver-side front air mix actuator • Open, short circuit in wiring or poor connection between front climate control unit and passenger-side front air mix actuator • Open, short circuit in wiring or poor connection between front climate control unit and driver-side front air mix actuator position sensor • Open, short circuit in wiring or poor connection between front climate control unit and passenger-side front air mix actuator position sensor • Front climate control unit malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | CHECK SYMPTOM • Turn on the front A/C. • Perform the dual A/C control function for driver and passenger-side individually. • Is it either of cannot the temperature control on driver seat side or front passenger seat side? | Yes | Go to the next step.
No | Go to Step 8.
2 | INSPECT TO SEE WHETHER MALFUNCTION IS IN AIR MIX DOOR OR ELSEWHERE • Turn on the front A/C • Change temperature control for suspect side seat at the dual mode. • Does the suspect side air mix door move smoothly? | Yes | Go to the next step.
No | Go to Step 6.
3 | INSPECT AIR MIX DOOR • Inspect the suspect side air mix door. ― Is the fan free of interfere with the suspect side A/C unit case? ― Is the fan free of foreign material and obstruction? • Is the air mix door normal? | Yes | Go to the next step.
No | Remove the obstruction or replace the suspect side A/C unit case, then go to Step 9.
4 | INSPECT FRONT AIR MIX ACTUATOR • Inspect the suspect side front air mix actuator. • Is the front air mix actuator normal? | Yes | Go to the next step.
No | Replace the suspect front air mix actuator, then go to Step 9.
5 | INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (OPEN, SHORT OR POOR CONNECTION OF TERMINALS BETWEEN AIR MIX ACTUATOR AND FRONT CLIMATE CONTROL UNIT) OR ELSEWHERE • Inspect for open, short or poor connection of terminals between the suspect front air mix actuator and front climate control unit. ― Terminal 1A (front climate control unit)— terminal G (driver-side front air mix actuator) ― Terminal 1D (front climate control unit)— terminal F (driver-side front air mix actuator) ― Terminal 1E (front climate control unit)— terminal F (passenger-side front air mix actuator) ― Terminal 1C (front climate control unit)— terminal G (passenger-side front air mix actuator) • Is there any open, short or poor connection of terminals? | Yes | Repair or replace malfunction part, then go to Step 9.
No | Replace the front climate control unit, then go to Step 9.
6* | INSPECT FRONT AIR MIX ACTUATOR POSITION SENSOR • Inspect the suspect side front air mix actuator position sensor. • Is the front air mix actuator position sensor normal? | Yes | Go to the next step.
No | Replace the suspect front air mix actuator position sensor, then go to Step 9.
7 | INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (OPEN, SHORT OR POOR CONNECTION OF TERMINALS BETWEEN AIR MIX ACTUATOR POSITION SENSOR AND FRONT CLIMATE CONTROL UNIT) OR ELSEWHERE • Inspect for open, short or poor connection of terminals between the suspect front air mix actuator position sensor and front climate control unit. ― Terminal 2F (front climate control unit)— terminal E (driver-side front air mix actuator position sensor) ― Terminal 2G (front climate control unit)— terminal E (passenger-side front air mix actuator position sensor) ― Terminal 2B (front climate control unit)— terminal A (each side front air mix actuator position sensor) ― Terminal 2P (front climate control unit)— terminal C (each side front air mix actuator position sensor) • Is there any open, short or poor connection of terminals? | Yes | Repair or replace malfunction part, then go to Step 9.
No | Replace the front climate control unit, then go to Step 9.
8 | INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (OPEN, SHORT OR POOR CONNECTION OF TERMINALS BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR MIX ACTUATOR POSITION SENSOR) OR ELSEWHERE • Inspect for open, short or poor connection of terminals between the front climate control unit and front air mix actuator position sensor. ― Terminal 2B (front climate control unit)— terminal A (each front air mix actuator position sensor) ― Terminal 2P (front climate control unit)— terminal C (each front air mix actuator position sensor) • Is there any open, short or poor connection of terminals? | Yes | Repair or replace malfunction part, then go to the next step.
No | Replace the front climate control unit, then go to the step.
9 | CONFIRM THAT MALFUNCTION SYMPTOMS DOES NOT RECUR AFTER REPAIR • Does the temperature adjust individually for driver seat and front passenger seat? | Yes | Troubleshooting completed. Explain repairs to customer.
No | Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.