MTC Air Conditioner - Page 63

TROUBLE DIAGNOSIS
MTC-63
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MTC
Revision: January 2005 2004 Quest
2. CHECK POWER SUPPLY CIRCUITS FOR AIR MIX DOOR MOTOR (FRONT)
1. Disconnect front air control connector and air mix door motor
(front) connector.
2. Check continuity between front air control harness connector
M49 terminal 3 (L/W) and air mix door motor (front) connector
M39 terminal 5 (L/W) and between front air control harness con-
nector M49 terminal 4 (L/B) and air mix door motor (front) con-
nector M39 terminal 6 (L/B).
OK or NG
OK >> Replace air mix door motor (front). Refer to MTC-135,
"AIR MIX DOOR MOTOR (FRONT)" .
NG >> Repair or replace harness as necessary.
3. CHECK PBR REFERENCE SIGNAL VOLTAGE
1. Disconnect the air mix door motor (front) harness connector.
2. Check voltage between air mix door motor (front) harness con-
nector M39 terminal 3 (W/G) and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR MOTOR (FRONT) AND
FRONT AIR CONTROL
1. Disconnect the front air control harness connector.
2. Check continuity between air mix door motor (front) harness
connector M39 terminal 3 (W/G) and front air control harness
connector M49 terminal 2 (W/G).
OK or NG
OK >> Replace front air control. Refer to MTC-116, "FRONT
AIR CONTROL" .
NG >> Repair or replace harness as necessary.
Continuity should exist.
WJIA0535E
5V (Approx.) should exist.
WJIA0536E
Continuity should exist.
WJIA0537E