NO.5 WINDSHIELD FOGGED [MANUAL AIR CONDITIONER]

id0703c2801900

5 | Windshield fogged.
DESCRIPTION | • A/C compressor does not operate while airflow mode is in DEFROSTER or HEAT/DEF modes. • Air intake mode does not change to FRESH while airflow mode is in DEFROSTER or HEAT/DEF modes.
POSSIBLE CAUSE | • Climate control unit (B+ signal) system malfunction • Air intake actuator malfunction • Climate control unit (RECIRCULATE, FRESH signal) system malfunction • Malfunction in A/C unit air intake doors

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | COOL AIR BLOW OUT INSPECTION • When both A/C and fan switch in climate control unit are on, does cool air blow out from front vent? | Yes | Go to the next step.
No | Go to Step 1 of troubleshooting index No.8.
2 | INSPECT CLIMATE CONTROL UNIT POWER SUPPLY FUSE FOR B+ SIGNAL • Is climate control unit power supply fuse for B+ signal okay? | Yes | Go to the next step.
No | Inspect for a short to ground on blown fuse circuit. Repair or replace as necessary. Install appropriate amperage fuse.
3 | INSPECT AIR INTAKE ACTUATOR • Inspect air intake actuator. ― Is there grease on link? ― Is link securely and properly positioned? ― Is link free of obstructions? • Are above items okay? | Yes | Go to the next step.
No | Apply grease or install link properly and securely, remove obstruction, then go to Step 14.
*4 | INSPECT WIRING HARNESS BETWEEN FUSE BLOCK AND CLIMATE CONTROL UNIT FOR CONTINUITY • Disconnect climate control unit connector (20-pin). • Switch the ignition to ON. • Test voltage at climate control unit connector terminal B (B+ signal). • Is voltage approx. 12 V? | Yes | Go to the next step.
No | Repair wiring harness between fuse block and climate control unit, then go to Step 14.
*5 | INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND GROUND FOR VOLTAGE • Test voltage at climate control unit connector terminal H (Ground). • Is voltage approx. 0V? | Yes | Go to the next step.
No | Repair wiring harness between climate control unit and ground, then go to Step 14.
6 | VERIFY WHETHER MALFUNCTION IS IN A/C UNIT AIR INTAKE DOOR OR ELSEWHERE • Switch the ignition to off. • Connect climate control unit connector (20-pin). • Remove air intake actuator. • Switch the ignition to ON. • Set fan switch to 4th position. • Does air intake mode (RECIRCULATE, FRESH) change smoothly when air intake link is operated by hand? | Yes | Go to the next step.
No | Go to Step 12.
7 | INSPECT AIR INTAKE ACTUATOR • Inspect air intake actuator. (See DTC INSPECTION.) • Is it okay? | Yes | Go to the next step.
No | Replace air intake actuator, go to Step 14. (See AIR INTAKE ACTUATOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
8 | INSPECT AIR INTAKE SELECTOR SWITCH AND DEFROSTER SWITCH IN CLIMATE CONTROL UNIT • Test voltage at climate control unit connector (20-pin) terminals G and I. • Is it okay? | Yes | Go to the next step.
No | Replace climate control unit, then go to Step 14. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
*9 | INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR CONTINUITY • Switch the ignition to off. • Is there continuity between following climate control unit connector (20-pin) terminal and air intake actuator connector terminal? ― Terminal A —Terminal G (ACTR POWER) ― Terminal C —Terminal I (ACTR SIGNAL) | Yes | Go to the next step.
No | Repair wiring harness between climate control unit and air intake actuator, then go to Step 14.
*10 | INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR SHORT TO GROUND • Is there continuity between following climate control unit connector (20-pin) terminal and ground? ― Terminal G (ACTR POWER) ― Terminal I (ACTR SIGNAL) | Yes | Repair wiring harness between climate control unit and air intake actuator, then go to Step 14.
No | Go to the next step.
*11 | INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR SHORT TO B+ • Switch the ignition to ON. • Test voltage at following climate control unit connector (20-pin) terminal. ― Terminal G (ACTR POWER) ― Terminal I (ACTR SIGNAL) • Is voltage approx. 12 V? | Yes | Repair wiring harness between climate control unit and air intake actuator, then go to Step 14.
No | Replace climate control unit, then go to Step 14. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
12 | INSPECT A/C UNIT AIR INTAKE DOOR • Is there any foreign material or obstruction in A/C unit air intake door? | Yes | Remove obstruction, then go to Step 14.
No | Go to the next step.
13 | VERIFY THAT A/C UNIT AIR INTAKE DOOR IS POSITIONED SECURELY AND PROPERLY • Is A/C unit air intake door securely and properly positioned? | Yes | Inspect air intake door for cracks or damage, then go to the next step.
No | Install air intake door securely in proper position, then go to the next step.
14 | VERIFY THAT MALFUNCTION SYMPTOM OCCURS AFTER REPAIR • Does malfunction disappear? | Yes | Troubleshooting completed. Explain repairs to customer.
No | Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.