MTC Air Conditioner - Page 56

MTC-56
TROUBLE DIAGNOSIS
Revision: January 2005 2004 Quest
1. CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL
1. Disconnect front air control connector.
2. Check voltage between front air control harness connector M49
terminals 14 (G/Y) and 22 (Y/R), and ground.
OK or NG
OK >> GO TO 2.
NG >> Check 10A and 15A fuses [Nos. 2 and 19, located in the fuse block (J/B)]. Refer to PG-71
.
● If fuses are OK, check harness for open circuit. Repair or replace as necessary.
● If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as neces-
sary.
2. CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Check continuity between front air control harness connector
M49 terminal 1 (B) and ground.
OK or NG
OK >> Replace front air control. Refer to MTC-116, "FRONT
AIR CONTROL" .
NG >> Repair harness or connector.
Terminals Ignition switch position
(+)
(-) OFF ACC ON
front air
control
connector
Terminal No.
(Wire color)
M49 14 (G/Y)
Ground
Approx. 0V Approx. 0V
Battery
voltage
M49 22 (Y/R)
Battery
voltage
Battery
voltage
Battery
voltage
WJIA0415E
Continuity should exist.
WJIA1588E