Page 822 of 1500
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-121
STEP 17. Check the defogger.
(1) Let the engine run at 2,000 r/min, and check the printed
heater with the battery fully charged.
(2) Turn on the defogger switch, and use a voltmeter to
measure the voltage in each printed heater at middle point
A on the rear window glass.
The value should be approximately 6 volts.
Q: Does the defogger work normally?
YES : Replace the A/C-ECU. Check that the defogger
system works normally.
NO : Repair the defogger. Or replace rear glass. Refer to
GROUP 42, Rear Window Glass.P.42-12
INSPECTION PROCEDURE 9: Defogger Timer Function does not Operate.
.
CIRCUIT OPERATION
Turn ON the defogger switch. If the defogger does
not shut off after about 16 minutes then the defogger
timer is malfunctioning.
.
TROUBLESHOOTING HINT
Malfunction of the A/C-ECU
Malfunction of the defogger timer
Refer to component locations GROUP-70
Refer to configuration diagrams GROUP-80
Refer to circuit diagrams GROUP-90
DIAGNOSIS
Replace the A/C-ECU.
Page 835 of 1500
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-134
Air outlet c/o
potentiometer55 Mode selection
damper control
motor potentiometerIgnition switch: ON Damper
positionOpening degree (V)
FA C E A p pr o x . 5
FOOT Approx. 3.75
FOOT/DEF. Approx. 2.5
DEF. Approx. 1.75
Air outlet c/o
potentiometer
(target)56 Target value for
mode selection
damper control
motor potentiometerIgnition switch: ON Damper
positionOpening degree (V)
FA C E A p pr o x . 5
FOOT Approx. 3.75
FOOT/DEF. Approx. 2.5
DEF. Approx. 1.75
In/out air
changeover
damper motor65 Outside/inside air
selection damper
control motorIgnition switch: ON Damper set
positionDamper position
Fresh air
positionFRESH
Air recirculation
positionRECIRC
Front blower fan 68 Blower motor Ignition switch: ON The actual air
volume (blower
motor speed)
corresponds to the
air volume shown on
the diagnostic tool.
Front blower
motor voltage 71 Blower motor Ignition switch: ON The air volume set
by the heater control
corresponds to the
value shown on the
diagnostic tool. (V)
Air conditioning
switch state1 Air conditioning
switchIgnition switch: ON Air conditioning
switch: ONDiagnostic tool
indication: "pressed"
Air conditioning
switch: OFFDiagnostic tool
indication: "release"
Rear defogger
switch state7 Rear window
defogger switchIgnition switch: ON Rear window
defogger
switch: ONDiagnostic tool
indication: "pressed"
Rear window
defogger
switch: OFFDiagnostic tool
indication: "release"
Refrigerant
pressure73 Refrigerant pressure Ignition switch: ON The diagnostic tool
indication is normal MUT-III
DIAGNOSTIC
TOOL DISPLAYITEM
NO.INSPECTION ITEM INSPECTION REQUIREMENT NORMAL VALUE
Page 837 of 1500
AUTO A/C DIAGNOSIS
HEATER, AIR CONDITIONING AND VENTILATION55-136
ACTUATOR TEST REFERENCEM1554005200133
MUT-III DIAGNOSTIC
TOOL DISPLAYITEM NO. INSPECTION ITEM DRIVE CONTENT
Blower fan: OFF 83 Blower motor OFF
Blower fan: Middle 84 Middle speed
Blower fan: High 85 High speed
Air mix damper motor:
0%42 Air mixing damper control motor Opening degree: approx.
0% (Max cool)
Air mix damper motor:
100%43 Opening degree: approx.
100% (Max hot)
Air outlet c/o damper:
FA C E70 Mode selection damper control
motorFA C E
Air outlet c/o damper: Bi_
Level67 FOOT/FACE
Air outlet c/o damper:
FOOT71 FOOT
Air outlet c/o damper:
DEF/FOOT69 DEF/FOOT
Air outlet c/o damper:
DEF68 DEF
Idle up request: high load 74 Idle speed HIGH idle up
Idle up request: low load 75 LOW idle up
Idle up request: OFF 76 OFF
Rear defogger switch:
OFF40 Rear window defogger switch Rear window defogger: OFF
Rear defogger switch:
ON41 Rear window defogger: ON
Idle up request: OFF 50 Idle up operation Idle up: OFF
Idle up request: low load 51 Idle up: low load
Idle up request: high load 52 Idle up: high load
Condenser: 0% 77 Condenser fan OFF
Condenser: 50% 79 Middle speed
Rheostat: 0% 80 Rheostat- Illumination control OFF
Rheostat: 100% 81 Full duty
Rheostat: 50% 82 Half duty
Page 844 of 1500
ON-VEHICLE SERVICE
HEATER, AIR CONDITIONING AND VENTILATION55-143
PERFORMANCE TEST M1552001400526
The vehicles to be tested should be parked out of direct sun-
light.
1. Close the high and low-pressure valve of the gauge
manifold.
2. Connect the charging hose (blue) to the low-pressure valve
and connect the charging hose (red) to the high-pressure
valve of the gauge manifold.
3. Install the quick joint (for low-pressure) to the charging hose
(blue), and connect the quick joint (for high-pressure) to the
charging hose (red).
To connect the quick joint, press section A firmly
against the service valve until a click is heard.
When connecting, run your hand along the hose while
pressing to ensure that there are no bends in the hose.
4. Connect the quick joint (for low-pressure) to the
low-pressure service valve and connect the quick joint (for
high-pressure) to the high-pressure service valve.
NOTE: The high-pressure service valve is on the A/C pipe
and the low-pressure service valve is on the suction hose.
5. Start the engine.
6. Set the A/C controls as follows:
A/C switch: A/C ON position
Mode selection: FACE position
Temperature control: MAXIMUM COOLING position
Air selection: RECIRCULATION position
Blower switch: Maximum air volume
7. Adjust engine speed to 1,500 r/min with A/C clutch engaged.
8. Engine should be warmed up with doors and windows
closed.
9. Insert a thermometer in the center air outlet and operate the
engine for 20 minutes.
NOTE: If the A/C clutch cycles, take the reading before the
clutch disengages.
10.Note the discharge air temperature.
PERFORMANCE TEMPERATURE CHART
GARAGE AMBIENT AIR TEMPERATURE C
(
F)20 (68) 25 (77) 30 (86) 35 (95)
Discharge air temperature
C (F) 1 (34) 6 (43)
Compressor high pressure kPa (psi) 1275 (185)
1863 (270)
Compressor low pressure kPa (psi) 49 (7.1)
294 (42.7)
Page 885 of 1500
RELAY
COMPONENT LOCATIONS70-6
RELAYM1701000400381
NAME SYMBOL NAME SYMBOL
A/C compressor clutch relay A Fuel pump relay (2) C
A/T control relay A Horn relay A
Accessory socket relay C Rear window defogger relay C
Blower relay C MPI relay A
Fan control relay A Power window relay C
Fog Lamp relay A Rear window defogger relay C
Fuel pump relay (1) C
Page 893 of 1500
CONTROL UNIT
COMPONENT LOCATIONS70-14
CONTROL UNITM1701000700360
NAME SYMBOL NAME SYMBOL
ABS-ECU or ABS/TCL-ECU A Multi center display unit F
A/C-ECU J Engine-ECU B
Column switch (incorporating
column-ECU)D Power window main switch
(incorporating CPU)M
Combination meter (incorporating CPU) E SRS-ECU I
ETACS-ECU G Sunroof assembly (incorporating
sunroof-ECU)K
Front-ECU C A/T-ECU L
Page 1062 of 1500
Page 1068 of 1500
42-1
GROUP 42
BODY
CONTENTS
HOOD . . . . . . . . . . . . . . . . . . . . .
42-4
BODY DIAGNOSIS . . . . . . . . . . . .
42-4
INTRODUCTION TO HOOD DIAGNOSIS42-4
HOOD DIAGNOSTIC TROUBLESHOOTING
STRATEGY . . . . . . . . . . . . . . . . . . . . . . 42-4
SYMPTOM CHART . . . . . . . . . . . . . . . . 42-4
SYMPTOM PROCEDURES . . . . . . . . . 42-4
ON-VEHICLE SERVICE. . . . . . . . .42-6
ADJUSTMENT OF CLEARANCE
AROUND HOOD . . . . . . . . . . . . . . . . . . 42-6
ALIGNMENT OF HOOD LATCH AND
STRIKER . . . . . . . . . . . . . . . . . . . . . . . . 42-6
ADJUSTMENT OF HOOD HEIGHT . . . 42-7
HOOD . . . . . . . . . . . . . . . . . . . . . . .42-8
REMOVAL AND INSTALLATION . . . . . 42-8
FENDER . . . . . . . . . . . . . . . . . . .42-10
REMOVAL AND INSTALLATION .
42-10
FUEL FILLER LID . . . . . . . . . . .42-11
REMOVAL AND INSTALLATION .
42-11
STRUT TOWER BAR . . . . . . . . 42-12
REMOVAL AND INSTALLATION .
42-12
WINDOW GLASS . . . . . . . . . . . 42-12
GENERAL . . . . . . . . . . . . . . . . . . . .
42-12
WINDOW GLASS DIAGNOSIS . . .42-14
INTRODUCTION TO WINDOW GLASS
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . 42-14
WINDOW GLASS DIAGNOSTIC
TROUBLESHOOTING STRATEGY . . . . 42-14
WINDOW GLASS DIAGNOSTIC TROUBLE
SYMPTOM CHART . . . . . . . . . . . . . . . . 42-14
SYMPTOM PROCEDURES . . . . . . . . . . 42-14
SPECIAL TOOL . . . . . . . . . . . . . . .42-14
WINDSHIELD . . . . . . . . . . . . . . . . .42-15
REMOVAL AND INSTALLATION . . . . . . 42-15
REAR WINDOW GLASS . . . . . . . .42-20
REMOVAL AND INSTALLATION . . . . . . 42-20
Continued on next page
