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.
• 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.
|