MTC Air Conditioner - Page 75

TROUBLE DIAGNOSIS
MTC-75
C
D
E
F
G
H
I
K
L
M
A
B
MTC
Revision: January 2005 2004 Quest
4. CHECK FRONT BLOWER MOTOR RELAY
Refer to MTC-78, "
Front Blower Motor Relay" .
OK or NG
OK >> GO TO 5.
NG >> Replace front blower motor relay.
5. CHECK FRONT BLOWER MOTOR POWER FROM RELAY TO FRONT BLOWER MOTOR
1. Reconnect front blower motor harness connector.
2. Disconnect front blower motor relay.
3. Connect a jumper wire between front blower motor relay con-
nector H2 (harness side) terminals 3 and 5 and between front
blower motor relay connector H2 (harness side) terminals 6 and
7.
4. Momentarily (no more than 4 seconds), set front blower switch
to any position except OFF.
OK or NG
OK >> GO TO 6.
NG >> GO TO 10.
6. CHECK FRONT BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition key ON.
2. Set front blower switch to any position except OFF.
3. Check voltage between front blower motor relay harness con-
nector H2 terminal 1 (G/Y) and ground.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
7. CHECK FRONT BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT
Check continuity between front blower motor relay harness connector H2 terminal 2 (B) and ground.
OK or NG
OK >> Replace front blower motor relay.
NG >> Repair harness or connector.
Front blower motor should rotate.
WJIA0503E
Battery voltage should exist.
WJIA0504E
Continuity should exist.
WJIA0505E