MTC Air Conditioner - System Description; Diagnostic Procedure for Rear Air Control

MTC-92
TROUBLE DIAGNOSIS
Revision: January 2005 2004 Quest
SYSTEM DESCRIPTION
Component Parts
Rear air control system components are:
● Front air control
● Rear air control
● Air mix motor (rear)
● Rear blower relay
● Rear blower motor resistor
● Rear blower motor
System Operation
Rear Air Control
When the rear blower switch (front) (integral to the front air control) is in the REAR position the rear blower
motor speeds and the rear temperature/mode are controlled by the rear blower switch (rear) and the rear tem-
perature switch (rear) (both integral to the rear air control).
DIAGNOSTIC PROCEDURE FOR REAR AIR CONTROL
SYMPTOM:
● Blower motor operation is malfunctioning. Refer to MTC-80, "Rear Blower Motor Circuit" .
● Temperature/mode operation is malfunctioning.
1. CHECK OPERATION FROM FRONT AIR CONTROL
Does rear temperature/mode operate normally from front air control?
Yes or No
Yes >> GO TO 2.
No >> Refer to MTC-64, "
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (REAR)" .
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