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NO.6 WINDSHIELD FOGGED

id070300800900
• 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.

6 | 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 blower unit air intake doors

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 (12-pin). • Turn ignition switch to ON position. • Test voltage at climate control unit connector terminal 2F (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 2L (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 BLOWER UNIT AIR INTAKE DOOR OR ELSEWHERE • Turn ignition switch to LOCK position. • Connect climate control unit connector (12-pin). • Remove air intake actuator. • Turn ignition switch to ON position. • 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 AIR INTAKE ACTUATOR INSPECTION.) • Is it okay? | Yes | Go to the next step.
No | Replace air intake actuator, go to Step 14.
8 | INSPECT AIR INTAKE SELECTOR SWITCH AND DEFROSTER SWITCH IN CLIMATE CONTROL UNIT • Test voltage at climate control unit connector (12-pin) terminals 2K and 2I. • Is it okay? | Yes | Go to the next step.
No | Replace climate control unit, then go to Step 14.
*9 | INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR CONTINUITY • Turn ignition switch to LOCK position. • Is there continuity between following climate control unit connector (12-pin) terminal and air intake actuator connector terminal? - Terminal D -Terminal 2K (FRESH signal) - Terminal F -Terminal 2I (RECIRCULATE 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 (12-pin) terminal and ground? - Terminal 2K (FRESH signal) - Terminal 2I (RECIRCULATE 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+ • Turn ignition switch to ON position • Test voltage at following climate control unit connector (12-pin) terminal. - Terminal 2K (FRESH signal) - Terminal 2I (RECIRCULATE 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.
12 | INSPECT BLOWER UNIT AIR INTAKE DOOR • Is there any foreign material or obstruction in blower unit air intake door? | Yes | Remove obstruction, then go to Step 14.
No | Go to the next step.
13 | VERIFY THAT BLOWER UNIT AIR INTAKE DOOR IS POSITIONED SECURELY AND PROPERLY • Is blower 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.