Rear Blower Motor Component Function Check

BLOWER MOTOR CONTROL SYSTEM


Rear Blower Motor Component Function Check

SYMPTOM:
- Rear blower motor does not operate from the rear air control (front) and the rear air control (rear).
- Rear blower motor operates from rear air control (front) only.
- Rear blower motor operates from rear air control (rear) only.
- Rear blower motor speed does not match the rear air control (front) speed selected.
- Rear blower motor speed does not match the rear air control (rear) speed selected.
- Rear blower motor operates in high all the time when controlled from the rear air control (front).
- Rear blower motor operates in high all the time when controlled from the rear air control (rear).

INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR AIR CONTROL (FRONT)
1. Press AUTO switch.
2. Turn the rear air control (front) blower control dial to the lowest speed and check for rear blower operation (REAR CTRL indicator off).
3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?
YES - GO TO 3.
NO - GO TO 2.
2.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR AIR CONTROL (REAR)
1. Press the REAR CTRL switch (indicator on) on the rear air control (front) to send control of the rear blower motor back the rear air control (rear).
2. Turn the rear air control (rear) blower control dial to the lowest speed and check for rear blower operation.
3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?
YES - Rear blower motor does not operate at any speed from the rear air control (front). Rear Air Control (Front) Diagnosis Procedure #1.
- Rear blower motor operates in high speed all the time or does not match the rear air control
(front) speed selected. Rear Air Control (Rear) Diagnosis Procedure #2.
NO - Rear blower motor does not operate from the rear air control (front) and the rear air control
(rear). Rear Air Control (Rear) Diagnosis Procedure #3
3.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REAR AIR CONTROL (REAR)
1. Press the REAR CTRL switch (indicator on) on the rear air control (front) to send control of the rear blower motor back the rear air control (rear).
2. Turn the rear air control (rear) blower control dial to the lowest speed and check for rear blower operation.
3. Continue checking that rear blower speed increases as the rear blower control dial is rotated clockwise.
Does the rear blower motor operate correctly?
YES - GO TO 4.
NO - Check rear air control (rear). Rear Air Control (Rear) Diagnosis Procedure #4.
4.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
- GO TO 5.
5.RECHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Operational Check (Front).
Does another symptom exist?
YES - How To Perform Trouble Diagnosis For Quick And Accurate Repair.
NO - Inspection End.