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TROUBLE DIAGNOSIS
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Circuit DiagramEJ S00 1G U
WITH GASOLINE ENGINE
TJWA0001E
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ATC-34
TROUBLE DIAGNOSIS
WITH DIESEL ENGINE
TJWA0005E
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Wiring DiagramEJS001GV
WITH DASOLINE ENGINE
TJWA0002E
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ATC-38
TROUBLE DIAGNOSIS
WITH DIESEL ENGINE
TJWA0006E
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ATC-42
TROUBLE DIAGNOSIS
Self-diagnosis Function
EJS001GX
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli-
cable sections (items) for details. Shifting from normal control to the self-diagnostic system is accomplished
by starting the engine (turning the ignition switch from OFF to ON) and pressing OFF switch for at least 5
seconds. The "OFF" 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 temperature dial, as required.
17Fan control amp. control
signalIGN
ONFan speed: 1st, 2nd, 3rd, 4th Approx. 2.5 - 3.5
Fan speed: 5th Approx. 9.0
18 Blower motor feed backIGN
ONFan speed: 1st Approx. 8.0
19 Fan ON signalIGN
ONBlower fan: ON Approx. 0
Blower fan: OFF Approx. 4.8
20 Power supply for ACCIGN
ON-Approx.12
21With gasoline engine:
Water temperature sensorIGN
ON-
With diesel engine:
Thermal transmitterIGN
ONWater temperature: 56°C Approx. 5.67 - 7.01
24 Sensor groundIGN
ON-Approx.0
25 Intake sensor - - -
30Compressor feed back sig-
nal (With gasoline engine)IGN
ON-Approx.0
Disconnect the refrigerant pressure sensor
connectorApprox. 5 TERMI-
NAL NO.ITEM CONDITIONVo ltag e
(V)
SKIA0056J
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Additionally shifting from STEP 5 to AUXILIARY MECHANISM is accomplished by means of pushing (fan)
UP switch.
PROCEDURE
1.SET IN SELF-DIAGNOSTIC MODE
1. Turn ignition switch ON.
2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.
>> GO TO 2.
RJIA0490E
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6.STEP 3 - MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
1. Turn the temperature dial clockwise.
2. Does code No.30 appear on the display?
Ye s o r N o
Yes >>GOTO7.
No >> GO TO 14.
7.STEP 4 - OPERATION OF EACH ACTUATOR IS CHECKED
1. Turn the temperature dial clockwise.
2. Engine running.
3. Press DEF switch, code No. of each actuator test is indicated on
the display.
>> GO TO 8.
RHA869DD
RHA495A
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lPress the mode switch as desired.
AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION (FOR LHD MODELS)
When ignition key is turned from OFF to ON, inlet port can be set to AUTO or manual.
Operating procedures for this trimmer are as follows:
lBegin Self-diagnosis STEP 5 mode.
lPress (fan) UP switch to set system in auxiliary mode.
lDisplay shows 61 in auxiliary mechanism.It takes approximately 3 seconds.
lPress the recirculation (REC) switch as desired.
Operational CheckEJS001GY
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1. Set the temperature 90°For32°C.
2. Press OFF switch.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous tempera-
ture.
7. Press OFF switch.
If NG, go to trouble diagnosis procedure for memory functionAT C - 9 2
.
If OK, continue with next check.
RJIA0040E
LED status of REC switch Setting status Setting changeover method
ON Manual REC status is memorized.
REC SW : ON
OFF AUTO control
Conditions :Engine running and at normal operating temperature
RJIA0496E