A/C - Rear Blower Motor Inoperative
03-021August 18, 2003
Applies To:
2001-02 MDX - ALL
2003 MDX - From VIN 2HNYD1...3H000001 thru 2HNYD1...3H539316
Rear Blower Does Not Work
SYMPTOM
The rear center vents do not blow air at any climate control setting.
PROBABLE CAUSE
The power transistor for the rear blower has an open circuit.
CORRECTIVE ACTION
Replace the rear power transistor.
PARTS INFORMATION
Transistor Assembly: P/N 79330-S3V-A51
WARRANTY CLAIM INFORMATION
In warranty: The normal warranty applies.
Operation Number: 613103
Flat Rate Time: 0.6 hour
Failed Part: P/N 79330-S2K-941
Defect Code: 032
Contention Code: B01
Template ID: 03-021A
Skill Level: Repair Technician
Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Parts and Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.
DIAGNOSIS
1. Turn the ignition switch to LOCK (0), and remove the key.
2. Move the driver's seat all the way back.
3. Remove the driver's console side trim by pulling out at the front, popping out the clips, and releasing the two tabs.
4. While wearing protective gloves, reach through the opening in the center console frame, and disconnect the wire harness from the rear power transistor.
5. Locate the lock tab release at the bottom of the transistor. Push the lock tab down and toward the rear, then turn the power transistor clockwise past the lock tab.
6. Pull out the rear power transistor.
7. Check the resistance between pins 3 and 4.
Is the resistance more than 1M Ohms (1,000,000 ohms)?
YES - Replace the power transistor (go to REPAIR PROCEDURE).
NO - This service bulletin does not apply to the problem. Test the rear blower motor system for other possible causes (see page 21-76 in the 2001-02 MDX Service Manual, or page 21-79 in the 2003 MDX Service Manual).
REPAIR PROCEDURE
1. Install a new power transistor into position, and turn it counterclockwise past the lock tab. Make sure the transistor locks firmly into place.
2. Reconnect the wire harness.
3. Clean the blower intake screen by vacuuming it.
4. Reinstall the driver's side console trim. Insert the front tab first, then reconnect the clips by lightly tapping the trim into place.
5. Insert the key, and turn the ignition switch to ON (II).
6. On the front climate control panel, press the A/C button (or touch the icon), and then press the RR A/C MANUAL button.
7. On the rear A/C passenger control panel, turn the fan speed control dial clockwise.
5. Check that the rear blower is operating and air is blowing out of the rear center vents.