A/C - Rear Blower Motor is Inoperative
03-048April 12, 2007
Applies To:
2003 Pilot EX- From VIN 2HKYF18..3H500001 thru 2HKYF18..3H604126
Rear Blower Motor Does Not Work
(Supersedes 03-048, dated September 21, 2004, to update the information marked by the black bar and asterisks)
SYMPTOM
The rear upper and lower 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
Rear Power Transistor P/N 79330-53V-A51
H/C 7543184
WARRANTY CLAIM INFORMATION
In warranty:
The normal warranty applies.
Operation Number: 613103
Flat Rate Time: 0.6 hour
Failed Part: P/N 79330-52K-941
H/C 6516181
Defect Code: 06801
Symptom Code: 01201
Template ID: 03-048A
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. Start the engine.
2. Press the AUTO button on the front A/C control panel.
3. Check for airflow from the rear upper vents and the lower vent while adjusting the front temperature control from full cold to full hot.
^ If there is any airflow from the upper vents or the lower vent, this service bulletin does not apply. Check for other possible causes.*
^ If there is no airflow, go to step 4.
4. Turn the ignition switch to LOCK (0), and remove the key.
5. Move the driver's seat all the way back.
6. Remove the driver's console side trim by pulling out at the front, popping out the clips, and releasing the two tabs.
7. While wearing protective gloves, reach through the opening in the center console frame and disconnect the wire harness from the rear power transistor.
8. 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.
9. Pull out the rear power transistor.
10. Measure the resistance between pins 3 and 4.
NOTE:
The power transistor temperature should be between 32°F and 130°F before measuring the resistance.
Is the resistance more than 1M Ohm (or open)?
YES - Replace the power transistor (go to REPAIR PROCEDURE).
NO - This service bulletin does not apply. Test the blower motor system for other possible causes.
^ Refer to page 21-94 in the 2003-2004 Pilot Service Manual, or
^ Online, enter keyword REAR BLOWER and select Rear Blower Motor Circuit Troubleshooting (with A/C) from the list.
REPAIR PROCEDURE
1. Install a new rear 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. Turn the ignition switch to ON (II).
6. Press the AUTO button on the front climate control panel twice. Check that FULL AUTO is displayed.
7. Turn the temperature control dial counterclockwise until LO is displayed.
8. Check that the rear blower is operating and air is blowing out of the rear upper vents.
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