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\
HEATER&
AIR CONDITIONER
SECTION
HA
MODIFICATION NOTICE:
lWiring Diagrams for manual A/C have been changed.
lAuto A/C has been added to RHD models for Europe.
lAuto A/C of LHD models for Europe have been changed.
CONTENTS
MANUAL AND AUTO
PRECAUTIONS AND PREPARATION ............... 2002
Supplemental Restraint System (SRS) ²AIR
BAG ²and ²SEAT BELT PRE-TENSIONER ².. 2002
MANUAL
TROUBLE DIAGNOSES ..................................... 2003
Wiring Diagram - HEATER -............................ 2003
Circuit Diagram - Air Conditioner..................... 2004
Wiring Diagram - A/C, M -/Except for KA
Engine Models ................................................. 2005
Wiring Diagram - A/C, M -/KA Engine LHD
Models.............................................................. 2008
Wiring Diagram - A/C, M -/KA Engine RHD
Models.............................................................. 2011
Magnet Clutch .................................................. 2014
AUTO
DESCRIPTION..................................................... 2023
Introduction ...................................................... 2023
Features ........................................................... 2023
Overview of Control System ............................ 2024
Control Operation............................................. 2024
TROUBLE DIAGNOSES ..................................... 2026 Component Location ........................................ 2026
Circuit Diagram ................................................ 2027
Wiring Diagram - A/C, A -................................ 2028
Auto Amp. Terminals and Reference Value .... 2032
Self-diagnosis................................................... 2034
How to Perform Trouble Diagnoses for Quick
and Accurate Repair ........................................ 2040
Operational Check ........................................... 2041
A/C System ...................................................... 2045
Mode Door Motor ............................................. 2047
Air Mix Door Motor........................................... 2052
Intake Door Motor ............................................ 2058
Blower Motor .................................................... 2062
Magnet Clutch .................................................. 2068
Insufficient Cooling........................................... 2075
Insufficient Heating .......................................... 2076
Noise ................................................................ 2077
Self-diagnosis................................................... 2078
Memory Function ............................................. 2079
Ambient Sensor ............................................... 2080
In-vehicle Sensor ............................................. 2082
Aspirator Motor ................................................ 2084
Sunload Sensor ............................................... 2084
Intake Sensor ................................................... 2087
When you read wiring diagrams:
+
Read GI section, ªHOW TO READ WIRING DIAGRAMSº.
+ See EL section, ªPOWER SUPPLY ROUTINGº for power distribution circuit.
When you perform trouble diagnoses, read GI section, ªHOW TO FOLLOW FLOW
CHART IN TROUBLE DIAGNOSESº and ªHOW TO PERFORM EFFICIENT DIAGNOSIS
FOR AN ELECTRICAL INCIDENTº.
HA
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How to Perform Trouble Diagnoses for Quick
and Accurate Repair
WORK FLOW
*1: Operational Check (HA-2041)
SYMPTOM TABLE
Symptom Reference page
lA/C system does not come on.lGo to Trouble Diagnosis Procedure for A/C system. HA-2045
lAir outlet does not change.
lGo to Trouble Diagnosis Procedure for Mode Door Motor. HA-2049lMode door motor does not operate nor-
mally.
Discharge air temperature does not change.
lGo to Trouble Diagnosis Procedure for Air Mix Door Motor. HA-2055lAir mix door motor does not operate nor-
mally.
lIntake door does not change.
lGo to Trouble Diagnosis Procedure for Intake Door Motor. HA-2060lIntake door motor does not operate nor-
mally.
lBlower motor operation is malfunctioning.
lGo to Trouble Diagnosis Procedure for Blower Motor. HA-2065lBlower motor operation is malfunctioning
under out of starting fan speed control.
lMagnet clutch does not engage.lGo to Trouble Diagnosis Procedure for Magnet Clutch. HA-2070
lInsufficient cooling.lGo to Trouble Diagnosis Procedure for Insufficient Cooling. HA-2075
lInsufficient heating.lGo to Trouble Diagnosis Procedure for Insufficient Heating. HA-2076
lNoise.lGo to Trouble Diagnosis Procedure for Noise. HA-2077
lSelf-diagnosis cannot be performed.lGo to Trouble Diagnosis Procedure for Self-diagnosis. HA-2078
lMemory function does not operate.lGo to Trouble Diagnosis Procedure for Memory Function. HA-2079
SHA900E
TROUBLE DIAGNOSESAUTO
HA-2040
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5. Check temperature dial
a. Turn temperature dial counterclockwise until 18ÉC is dis-
played.
b. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for insufficient cooling
(HA-2075).
If OK, continue with next check.
c. Turn temperature dial clockwise until 32ÉC is displayed.
d. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for insufficient heating
(HA-2076).
If OK, continue with next check.
RHA522G
TROUBLE DIAGNOSESAUTO
Operational Check (Cont'd)
HA-2043
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Insufficient Heating
TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT HEATING
SYMPTOM:
lInsufficient heating.
Inspection flow
*1: HA-2041
*2: HA-2035
*3: HA-2036
*4: HA-2038*5: HA-2055
*6: HA-2060
*7: HA-2065
*8: HA-2057*9: HA-2055
*10: HA-2039
*11: HA-2049
SHA346F
TROUBLE DIAGNOSESAUTO
HA-2076