Owner's Manual

MTC-34
TROUBLE DIAGNOSIS
ECM TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL AND GROUND
How to Perform Trouble Diagnoses for Quick and Accurate Repair EJS001AR
WORK FLOW
SYMPTOM TABLE
TERMINAL WIRE COLOR ITEM CONDITION DATA (DC)
49 R/Y SENSOR POWER SUPPLY IGNITION SWITCH "ON" APPROX. 5.0V
58 B/W ECM GROUND
IDLE SPEED (ENGINE RUN-
NING)
1V OR LESS
70 L
REFRIGERANT PRESSURE
SENSOR
BOTH A/C SWITCH AND
BLOWER SWITCH "ON" (ENGINE
RUNNING, WARM-UP CONDI-
TION, COMPRESSOR OPERAT-
ING)
0.36 - 3.88V
105 L AIR CONDITIONER RELAY
BOTH A/C SWITCH AND
BLOWER SWITCH "ON" (ENGINE
RUNNING) (COMPRESSOR
OPERATING)
0 - 1.0V
A/C SWITCH "OFF" (ENGINE
RUNNING)
BATTERY VOLTAGE
*1: MTC-35 *2 MTC-34
WJIA0258E
Symptom Reference page
● Intake door does not change in VENT, B/L or FOOT
mode.
● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR
INTAKE DOOR”.
MTC-38
● Air outlet does not change. ● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR
MODE DOOR”.
MTC-42
● Air mix door does not change. ● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR AIR
MIX DOOR”.
MTC-44
● Blower motor does not rotate at all. ● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR
BLOWER MOTOR”.
MTC-46
● Magnet clutch does not engage when A/C switch and
fan switch are ON.
● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR
MAGNET CLUTCH”.
MTC-51
● Insufficient cooling. ● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR
INSUFFICIENT COOLING”.
MTC-57
● Insufficient heating. ● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR
INSUFFICIENT HEATING”.
MTC-64
● Noise ● Go to “TROUBLE DIAGNOSIS PROCEDURE FOR
NOISE”.
MTC-65