MTC-76
TROUBLE DIAGNOSIS
Revision: January 2005 2004 Quest
8. REPLACE FUSE
Refer to PG-72, "
FUSE AND FUSIBLE LINK BOX" .
Does fuse open when front blower motor is turned on?
YES or NO
YES >> GO TO 9.
NO >> Inspection End.
9. CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1. Disconnect front blower motor harness connector.
2. Check continuity between front blower motor harness connector
M62 terminal + (W/L) and ground.
OK or NG
OK >> Check front blower motor. Refer to MTC-78, "Front
Blower Motor" .
NG >> Repair harness or connector.
10. CHECK FRONT BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1. Disconnect front blower motor harness connector.
2. Check continuity between front blower motor relay harness con-
nector H2 terminal 5 (W/L) and 7 (W/L) and front blower motor
harness connector M62 terminal + (W/L).
OK or NG
OK >> Repair harness or connector between front blower
motor fuses and front blower motor relay.
NG >> Repair harness or connector between front blower
motor relay and front blower motor.
11. CHECK FRONT BLOWER MOTOR
Refer to MTC-78, "
Front Blower Motor" .
OK or NG
OK >> GO TO 12.
NG >> Replace front blower motor.
12. CHECK FRONT BLOWER SWITCH
Refer to MTC-78, "
Front Blower Switch" .
OK or NG
OK >> Repair harness or connector between front blower switch and front blower motor.
NG >> Replace front air control. Refer to MTC-116, "
FRONT AIR CONTROL" .
13. CHECK FRONT BLOWER MOTOR RESISTOR
Refer to MTC-79, "
Front Blower Motor Resistor" .
OK or NG
OK >> GO TO 14.
NG >> Replace front blower motor resistor. Refer to MTC-137, "
Removal and Installation" .
Continuity should not exist.
WJIA0506E
Continuity should exist.
WJIA0968E
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