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TJWA0093E
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ATC-54
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TJWA0094E
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ATC-55
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Auto Amp. Terminals and Reference ValueEJS004GS
Measure voltage between each terminal and ground by following ter-
minals and reference value for auto amp.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR AUTO AMP.
RJIA2824E
RJIA0489E
Te r m i -
nal No.Wire
colorItemIgnition
switchConditionVoltage
(V)
1 BR/Y Power supply for IGN ON - Battery voltage
2 L Power supply for BAT OFF - Battery voltage
3 B Ground ON - Approx. 0
4 L/R A/C (Compressor ON) signal ONCompressor: ON Approx. 0
Compressor: OFF Approx. 5
5WPower supply for each door
motorON - Battery voltage
8 P In-vehicle sensor - - -
9 R/B Ambient sensor - - -
10 OR Sunload sensor - - -
11 B Illumination ground ON Light switch: ON Approx. 0
12 R/L Power supply for illumination ON Light switch: ON Approx. 12
15 G LAN signal ON -Approx. 5.5
17 L/YFan control amp. control sig-
nalONFan speed: 1-24th Approx. 2.5 - 3.5
Fan speed: 25th Approx. 9.0
18 R Blower motor feed back ON Fan speed: 1st Approx. 8.0
19 LG/BFan ON signal (With gasoline
engine)ONBlower fan: ON Approx. 0
Blower fan: OFF Approx. 5
HAK0652D
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ATC-56
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20 L/W Power supply for IGN2 ON - Battery voltage
21 GY Water temperature sensor ONAt idle [after warming up,
approx. 80°C (176°F)]
CAUTION:
The waveforms vary depend-
ing on coolant temperature
22 LG/BRear window defogger ON
signalONRear window defogger: ON Approx. 0
Rear window defogger: OFF Approx. 12
23 B/WRear window defogger feed
back signalONRear window defogger: ON Approx. 12
Rear window defogger: OFF Approx. 0
24 B/Y Sensor ground ON - Approx. 0
25 BR/Y Intake sensor - - -
28 YPower supply for ambient
temperature displayON - Approx. 5
30 PU Compressor feed back signal ON-Approx. 0
When refrigerant pressure sen-
sor connector is disconnectedApprox. 5 Te r m i -
nal No.Wire
colorItemIgnition
switchConditionVoltage
(V)
SKIA0056J
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Self-diagnosis FunctionEJS004GT
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line.
Self-diagnosis is step-1 to 7. There are two ways of changing method during self-diagnosis.
Switching to self-diagnosis step-1 to 4.
Shifting from usual control to the self-diagnostic system is accomplished by starting the engine (turning
the ignition switch from OFF to ON) and pressing A/C switch for at least 5 seconds. The A/C switch must
be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system will be
canceled by either pressing intake switch or turning the ignition switch OFF. Shifting from one step to
another is accomplished be means of turning fan control dial, as required.
Switching to self-diagnosis step-5 to 7 (Auxiliary mechanism).
Shifting from usual control to the self-diagnostic system is accomplished by starting the engine (turning
the ignition switch from OFF to ON) and pressing intake switch for at least 5 seconds. The intake switch
must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system
will be canceled by either pressing A/C switch or turning the ignition switch OFF. Shifting from one step to
another is accomplished by means of turning fan control dial, as required.
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RJIA2106E
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FUNCTION CONFIRMATION PROCEDURE
1. SET IN SELF-DIAGNOSTIC MODE (STEP-1 TO 4)
1. Set the fan control dial to OFF position.
2. Turn ignition switch ON.
3. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press A/C switch for at least 5 seconds.
CAUTION:
If battery voltage drops below 12V during diagnosis step-3, actuator speed becomes slower and as a
result, the system may generate an error even when operation is usual. To avoid this, start engine
before performing this diagnosis.
>> GO TO 2.
2. STEP-1: LEDS ARE CHECKED
Check intake and A/C switch LEDs illumination.
OK >> GO TO 3.
NG >> Refer to ATC-108, "
Self-diagnosis" .
3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
1. Turn fan control dial to AUTO position.
CAUTION:
When switched to STEP-2, LED of REC position blinks for
approximately 25 seconds.
2. Advance to self-diagnosis STEP-2?
Check A/C switch LED illumination.
YES >> GO TO 4.
NO >> Replace controller.
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Turn fan control dial to OFF position.
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace controller.
SJIA0389E
SJIA0390E
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5. STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
1. Turn fan control dial to AUTO position.
2. Turn mode control dial to AUTO position.
CAUTION:
When switched to STEP-2, LED of REC position blinks for
approximately 25 seconds.
3. Check A/C switch LED is illuminate.
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
1. Turn fan control dial to 1st–12th speed.
2. Check A/C switch LED is illuminate.
CAUTION:
When switched to STEP-3, LED of REC position blinks for
approximately 50 seconds.
OK or NG
OK >> GO TO 7.
NG >> GO TO 10.
7. STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED
1. Turn fan control dial to 13th–25th speed.
2. Change operation status of air conditioner by changing mode control dial position.
>> GO TO 8.
SJIA0391E
SJIA0392E