NO.3 AIRFLOW MODE FROM FRONT VENTS DOES NOT CHANGE


BME070301038205

3

Airflow mode from front vents does not change.

DESCRIPTION

• Malfunction in front A/C unit's airflow system.

POSSIBLE CAUSE

• Malfunction in front A/C unit's airflow mode link, crank, wire, or wire clamp
• Bevel gear set (2) in front climate control unit, airflow mode wire or wire clamp malfunction
• Malfunction in one or more front A/C unit doors

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT FRONT A/C UNIT'S AIRFLOW MODE SYSTEM
• Inspect front A/C unit's airflow mode link, crank, wire, and wire clamp as follows.
- Is there grease on link and crank?
- Are link and crank installed securely in their proper positions?
- Is wire clamp free of deformation?
• Are above items all okay?
Yes
Go to next step.
No
Apply grease or install link and crank securely in their proper positions. Repair or replace wire clamp, then go to Step 6.
2
VERIFY THAT AIRFLOW MODE WIRE FROM A/C UNIT IS POSITIONED SECURELY AND CORRECTLY
• Is airflow mode wire positioned securely and correctly in relation to the front A/C unit's airflow mode lever?
Yes
Go to next step.
No
Adjust wire or install it correctly, then go to Step 6.
3
INSPECT FRONT CLIMATE CONTROL UNIT
• Inspect front climate control unit as follows.
- Is bevel gear set properly engaged?
- Is airflow mode wire properly installed in correct direction on bevel gear?
- Is wire clamp free of deformation?
• Are above items okay?
Yes
Go to next step.
No
Properly engage bevel gear set or install airflow mode wire in correct direction, repair or replace wire clamp, then go to Step 6.
4
INSPECT FRONT A/C UNIT'S AIRFLOW MODE DOORS
• Is there any foreign material or obstructions in any of front A/C unit's doors?
Yes
Remove obstruction, then go to Step 6.
No
Go to next step.
5
VERIFY THAT ALL AIRFLOW MODE DOORS WITHIN FRONT A/C UNIT ARE POSITIONED SECURELY AND PROPERLY
•  Are all doors within front A/C unit securely and properly positioned?
Yes
Check each door for cracks or damage, then go to next step.
No
Install malfunction doors securely in proper position, then go to next step.
6
VERIFY THAT MALFUNCTION SYMPTOM OCCURS AFTER REPAIR
• Does airflow mode change?
Yes
Troubleshooting completed. Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.