MTC Air Conditioner - Page 65

TROUBLE DIAGNOSIS
MTC-65
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MTC
Revision: January 2005 2004 Quest
2. CHECK POWER SUPPLY CIRCUIT FOR AIR MIX DOOR MOTOR (REAR)
1. Disconnect front air control connector and air mix door motor
(rear) connector.
2. Check continuity between front air control harness connector
M50 terminal 27 (P/L) and air mix door motor (rear) connector
B146 terminal 1 (P/L) and between front air control harness con-
nector M50 terminal 28 (LG/R) and air mix door motor (rear)
connector B146 terminal 6 (LG/R).
OK or NG
OK >> Replace air mix door motor (rear). Refer to MTC-136,
"AIR MIX DOOR MOTOR (REAR)" .
NG >> Repair or replace harness as necessary.
3. CHECK PBR REFERENCE SIGNAL VOLTAGE
1. Disconnect the air mix door motor (rear) harness connector.
2. Check voltage between air mix door motor (rear) harness con-
nector B146 terminal 3 (W/G) and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN MODE DOOR AND FRONT AIR CONTROL
1. Disconnect the front air control harness connector.
2. Check continuity between air mix door motor (rear) harness con-
nector B146 terminal 3 (W/G) and front air control harness con-
nector 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.
LJIA0049E
5V (Approx.) should exist.
LJIA0050E
Continuity should exist.
LJIA0051E