NO.6 WINDSHIELD FOGGED

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NO.6 WINDSHIELD FOGGED

B3E070301038W08

• 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, inspect 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 (Steps 2, 4, 5) • Air intake actuator malfunction (Steps 3, 7) • Climate control unit (RECIRCULATE, FRESH signal) system malfunction (Steps 9-11) • A/C unit air intake door malfunction (Steps 12, 13)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | COOL AIR BLOW OUT INSPECTION • When both the A/C and fan switch in the climate control unit are on, does cool air blow out from the 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 the climate control unit power supply fuse for B+ signal normal? | Yes | Go to the next step.
No | Inspect for a short to ground on blown fuse circuit. • Repair or replace if necessary. Install appropriate amperage fuse.

3

INSPECT AIR INTAKE ACTUATOR

• Inspect the air intake actuator.

  - Is there grease on the link?
  - Is the link securely and properly positioned?
  - Is the link free of obstructions?

• Are the above items normal?

Yes

Go to the next step.

No | Apply grease or install the 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 the climate control unit connector (24-pin).
• Turn the ignition switch to the ON position.
• Measure the voltage at climate control unit terminal J (B+ signal).
• Is the voltage approx. 12 V?

Yes

Go to the next step.

No | Repair the wiring harness between the fuse block and climate control unit, then go to Step 14.
*5 | INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND GROUND FOR VOLTAGE • Measure the voltage at climate control unit terminal V (Ground). • Is the voltage approx. 0V? | Yes | Go to the next step.
No | Repair the wiring harness between the climate control unit and ground, then go to Step 14.

6

VERIFY WHETHER MALFUNCTION IS IN A/C UNIT AIR INTAKE DOOR OR ELSEWHERE

• Turn the ignition switch to the LOCK position.
• Connect the climate control unit connector (24-pin).
• Remove the air intake actuator.
• Turn the ignition switch to the ON position.
• Set the fan switch to 4th position.
• Does the air intake mode (RECIRCULATE, FRESH) change smoothly when the air intake link is operated by hand?

Yes

Go to the next step.

No | Go to Step 12.
7 | INSPECT AIR INTAKE ACTUATOR • Inspect the air intake actuator. (See AIR INTAKE ACTUATOR INSPECTION.) • Is it normal? | Yes | Go to the next step.
No | Replace the air intake actuator, go to Step 14.
8 | INSPECT AIR INTAKE SELECTOR SWITCH AND DEFROSTER SWITCH IN CLIMATE CONTROL UNIT • Measure the voltage at climate control unit connector (24-pin) terminals O and Q. • Is it normal? | Yes | Go to the next step.
No | Replace the climate control unit, then go to Step 14.

*9

INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR CONTINUITY

• Turn the ignition switch to the LOCK position.
• Is there continuity between the following climate control unit terminals and air intake actuator terminals?

  - Terminal E -Terminal O (FRESH signal)
  - Terminal C -Terminal Q (RECIRCULATE signal)

Yes

Go to the next step.

No | Repair the wiring harness between the 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 the following climate control unit terminals and ground?

  - Terminal O (FRESH signal)
  - Terminal Q (RECIRCULATE signal)

Yes

Repair the wiring harness between the 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 the ignition switch to the ON position
• Measure the voltage at the following climate control unit terminals.

  - Terminal O (FRESH signal)
  - Terminal Q (RECIRCULATE signal)

• Is the voltage approx. 12 V?

Yes

Repair the wiring harness between the climate control unit and air intake actuator, then go to Step 14.

No | Replace the climate control unit, then go to Step 14.
12 | INSPECT A/C UNIT AIR INTAKE DOOR • Is there any foreign material or obstruction in the 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 the A/C unit air intake door securely and properly positioned? | Yes | Inspect the air intake door for cracks or damage, then go to the next step.
No | Install the air intake door securely in the proper position, then go to the next step.
14 | VERIFY THAT MALFUNCTION SYMPTOM OCCURS AFTER REPAIR • Does the malfunction disappear? | Yes | Troubleshooting completed. Explain repairs to customer.
No | Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.