cooling NISSAN PICK-UP 1999 Repair Manual

GENERAL INFORMATIONGI
MAINTENANCEMA
ENGINE MECHANICALEM
ENGINE LUBRICATION &
COOLING SYSTEMSLC
ENGINE CONTROL SYSTEMEC
ACCELERATOR CONTROL, FUEL &
EXHAUST SYSTEMSFE
CLUTCHCL
MANUAL TRANSAXLEMT
TRANSFERTF
PROPELLER SHAFT &
DIFFERENTIAL CARRIERPD
FRONT AXLE & FRONT SUSPENSIONFA
REAR AXLE & REAR SUSPENSIONRA
BRAKE SYSTEMBR
STEERING SYSTEMST
RESTRAINT SYSTEMRS
BODY & TRIMBT
HEATER & AIR CONDITIONERHA
ELECTRICAL SYSTEMEL
ALPHABETICAL INDEXIDX
PICKUP
MODEL D22 SERIES
FOREWORD
This supplement contains informa-
tion concerning necessary service
procedures and relevant data for the
model D22 series.
All information, illustrations and spe-
ci®cations contained in this supple-
ment are based on the latest product
information available at the time of
publication. If your NISSAN model
differs from the speci®cations contain-
ed in this supplement, consult your
NISSAN distributor for information.
The right is reserved to make chan-
ges in speci®cations and methods at
any time without notice.
Edition: July 1999
Printing: August 1999 (01)
Publication No.: SM9E-D22BE0E
NISSAN EUROPE S.A.S.
1999 NISSAN EUROPE S.A.S. Printed in the Netherlands
Not to be reproduced in whole or in part without the prior written permission of Nissan Europe S.A.S., Paris, France.
QUICK REFERENCE INDEX

WARNING LAMPS.............................................. 2072
Schematic ........................................................ 2072
Wiring Diagram - WARN -/Gasoline Engine.... 2073
Wiring Diagram - WARN -/Diesel Engine ........ 2078
Electrical Components Inspection ................... 2083
Wiring Diagram - CHIME -/LHD Models.......... 2084
Wiring Diagram - CHIME -/RHD Models ......... 2085
FRONT WIPER AND WASHER.......................... 2086
Wiring Diagram - WIPER -/LHD Models with
Intermittent ....................................................... 2086
Wiring Diagram - WIPER -/LHD Models
without Intermittent........................................... 2087
Wiring Diagram - WIPER -/RHD M/T Models
with Intermittent................................................ 2088
Wiring Diagram - WIPER -/RHD Models
without Intermittent........................................... 2090
HEADLAMP WASHER........................................ 2092
Wiring Diagram - HLC - ................................... 2092
HORN................................................................... 2093
Wiring Diagram - HORN -................................ 2093
CIGARETTE LIGHTER........................................ 2094
Wiring Diagram - CIGAR - ............................... 2094
CLOCK................................................................. 2095
Wiring Diagram - CLOCK - .............................. 2095
REAR WINDOW DEFOGGER AND MIRROR
DEFOGGER......................................................... 2096
Wiring Diagram - DEF -/LHD Models .............. 2096
Wiring Diagram - DEF -/RHD Models ............. 2097
Electrical Components Inspection ................... 2098
AUDIO.................................................................. 2099
Wiring Diagram - AUDIO -/LHD Models
Type-2 .............................................................. 2099
Wiring Diagram - AUDIO -/LHD Models
Type-3 .............................................................. 2100
Wiring Diagram - AUDIO -/RHD Models ......... 2102
AUDIO ANTENNA............................................... 2103
Power Antenna/Wiring Diagram - P/ANT - ...... 2103
POWER DOOR MIRROR.................................... 2104
Wiring Diagram - MIRROR -/LHD Models....... 2104
Wiring Diagram - MIRROR -/RHD Models ...... 2105
HEATED SEAT.................................................... 2106
Wiring Diagram - H/SEAT - ............................. 2106
POWER WINDOW............................................... 2108
Schematic/Without Interruption Detection
Function ........................................................... 2108Wiring Diagram - WINDOW -/Without
Interruption Detection Function........................ 2109
Trouble Diagnoses/Without Interruption
Detection Function ........................................... 2113
System Description/With Interruption Detection
Function ........................................................... 2114
Schematic/With Interruption Detection
Function ........................................................... 2115
Wiring Diagram - WINDOW -/With Interruption
Detection Function ........................................... 2116
Trouble Diagnoses/With Interruption Detection
Function ........................................................... 2120
POWER DOOR LOCK......................................... 2122
System Description .......................................... 2122
Wiring Diagram - D/LOCK - ............................. 2123
Trouble Diagnosis ............................................ 2125
MULTI-REMOTE CONTROL SYSTEM............... 2129
System Description .......................................... 2129
Schematic ........................................................ 2130
Wiring Diagram - MULTI - ............................... 2131
Trouble Diagnoses ........................................... 2135
ID Code Entry Procedure ................................ 2139
NATS (Nissan Anti-Theft System)/Models with
KA24E.................................................................. 2140
Wiring Diagram - NATS -................................. 2140
NATS (Nissan Anti-Theft System)/Diesel
engine.................................................................. 2141
Wiring Diagram - NATS -/LHD Models............ 2141
Wiring Diagram - NATS -/RHD Models ........... 2142
LOCATION OF ELECTRICAL UNITS................. 2143
Engine Compartment ....................................... 2143
Passenger Compartment ................................. 2144
HARNESS LAYOUT............................................ 2146
Main Harness ................................................... 2146
Engine Room Harness..................................... 2152
Engine Control Harness................................... 2160
Alternator Harness ........................................... 2164
Instrument Harness.......................................... 2165
Room Lamp Harness/LHD Models .................. 2166
Room Lamp Harness/RHD Models ................. 2167
Chassis Harness and Tail Harness ................. 2168
Front Door Harness (LH side) ......................... 2169
Front Door Harness (RH side)......................... 2170
WIRING DIAGRAM CODES (CELL CODES)..... 2171
WIRING DIAGRAM REFERENCE CHART
COOLING FAN .......................................................................................................... LC SECTION
ECCS, IGNITION SYSTEM, QUICK-GLOW SYSTEM, FUEL HEATER SYSTEM .. EC SECTION
ANTI-LOCK BRAKE SYSTEM .................................................................................. BR SECTION
SRS ``AIR BAG'' ........................................................................................................ RS SECTION
HEATER AND AIR CONDITIONER .......................................................................... HA SECTION
EL-2002

Use the chart below to find out what each wiring diagram code
stands for.
Refer to the wiring diagram code in the alphabetical index to find
the location (page number) of each wiring diagram.
Code Section Wiring Diagram Name
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
A/C, M HA Manual Air Conditioner
A/C, A HA Auto Air Conditioner
AT/IND EL A/T Indicator
AUDIO EL Audio
BACK/L EL Back-up Lamp
BA/FTS ATBATT/A/T Fluid Temperature Sensor
and TCM Power Supply
CHARGE EL Charging System
CHIME EL Warning Chime
CHOKE EC Automatic Choke
CIGAR EL Cigarette Lighter
CLOCK EL Clock
CMPS EC Camshaft Position Sensor
COOL/F LC Cooling Fan Control
DEF ELRear Window Defogger and Mirror
Defogger
DIMDIP ELHeadlamp Ð With Dim-dip Lamp
System
D/LOCK EL Power Door Lock
DTRL ELHeadlamp Ð With Daytime Light
System
ECTS ECEngine Coolant Temperature
Sensor
EGRC/V EC EGRC Ð Solenoid Valve
ENGSS AT Engine Speed Signal
FCUT EC Fuel Cut Solenoid Valve
F/HEAT EC Fuel Heater System
FICD EC IACV-FICD Solenoid Valve
FIPOT EC ISC-FI Pot
FPCM EC Fuel Pump Control Module
F/PUMP EC Fuel Pump
GLOW EC Quick-glow System
H/AIM EL Headlamp Aiming Control
HEATER HA Heater
H/LAMP EL Headlamp
HLC EL Headlamp Washer
HO2S EC Heated Oxygen Sensor
HORN EL Horn
H/SEAT EL Heated SeatCode Section Wiring Diagram Name
IGN EC Ignition System
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INT/L EL Spot Lamp
KS EC Knock Sensor
LOAD EC Electric Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN EC, ATMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL ECMIL and Data Link Connector For
CONSULT
MIRROR EL Power Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-theft System
NONDTC AT Non-detectable Items
OVRCSV AT Overrun Clutch Solenoid Valve
P/ANT EL Power Antenna
PGC/V ECEVAP Canister Purge
Control Solenoid Valve
PLA EC Partial Load Advance Control
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
ROOM/L EL Interior Room Lamp
SHIFT AT Shift Lock System
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
SRS RS Supplemental Restraint System
S/SIG EC Start Signal
START EL Starting System
STOP/L EL Stop Lamp
SWL/V ECSwirl Control Valve Control Solenoid
Valve
TAIL/L EL Parking, License and Tail Lamps
TCV ATTorque Converter Clutch Solenoid
Valve
WIRING DIAGRAM CODES (CELL CODES)
EL-2171

WARNING LAMPS.............................................. 2072
Schematic ........................................................ 2072
Wiring Diagram - WARN -/Gasoline Engine.... 2073
Wiring Diagram - WARN -/Diesel Engine ........ 2078
Electrical Components Inspection ................... 2083
Wiring Diagram - CHIME -/LHD Models.......... 2084
Wiring Diagram - CHIME -/RHD Models ......... 2085
FRONT WIPER AND WASHER.......................... 2086
Wiring Diagram - WIPER -/LHD Models with
Intermittent ....................................................... 2086
Wiring Diagram - WIPER -/LHD Models
without Intermittent........................................... 2087
Wiring Diagram - WIPER -/RHD M/T Models
with Intermittent................................................ 2088
Wiring Diagram - WIPER -/RHD Models
without Intermittent........................................... 2090
HEADLAMP WASHER........................................ 2092
Wiring Diagram - HLC - ................................... 2092
HORN................................................................... 2093
Wiring Diagram - HORN -................................ 2093
CIGARETTE LIGHTER........................................ 2094
Wiring Diagram - CIGAR - ............................... 2094
CLOCK................................................................. 2095
Wiring Diagram - CLOCK - .............................. 2095
REAR WINDOW DEFOGGER AND MIRROR
DEFOGGER......................................................... 2096
Wiring Diagram - DEF -/LHD Models .............. 2096
Wiring Diagram - DEF -/RHD Models ............. 2097
Electrical Components Inspection ................... 2098
AUDIO.................................................................. 2099
Wiring Diagram - AUDIO -/LHD Models
Type-2 .............................................................. 2099
Wiring Diagram - AUDIO -/LHD Models
Type-3 .............................................................. 2100
Wiring Diagram - AUDIO -/RHD Models ......... 2102
AUDIO ANTENNA............................................... 2103
Power Antenna/Wiring Diagram - P/ANT - ...... 2103
POWER DOOR MIRROR.................................... 2104
Wiring Diagram - MIRROR -/LHD Models....... 2104
Wiring Diagram - MIRROR -/RHD Models ...... 2105
HEATED SEAT.................................................... 2106
Wiring Diagram - H/SEAT - ............................. 2106
POWER WINDOW............................................... 2108
Schematic/Without Interruption Detection
Function ........................................................... 2108Wiring Diagram - WINDOW -/Without
Interruption Detection Function........................ 2109
Trouble Diagnoses/Without Interruption
Detection Function ........................................... 2113
System Description/With Interruption Detection
Function ........................................................... 2114
Schematic/With Interruption Detection
Function ........................................................... 2115
Wiring Diagram - WINDOW -/With Interruption
Detection Function ........................................... 2116
Trouble Diagnoses/With Interruption Detection
Function ........................................................... 2120
POWER DOOR LOCK......................................... 2122
System Description .......................................... 2122
Wiring Diagram - D/LOCK - ............................. 2123
Trouble Diagnosis ............................................ 2125
MULTI-REMOTE CONTROL SYSTEM............... 2129
System Description .......................................... 2129
Schematic ........................................................ 2130
Wiring Diagram - MULTI - ............................... 2131
Trouble Diagnoses ........................................... 2135
ID Code Entry Procedure ................................ 2139
NATS (Nissan Anti-Theft System)/Models with
KA24E.................................................................. 2140
Wiring Diagram - NATS -................................. 2140
NATS (Nissan Anti-Theft System)/Diesel
engine.................................................................. 2141
Wiring Diagram - NATS -/LHD Models............ 2141
Wiring Diagram - NATS -/RHD Models ........... 2142
LOCATION OF ELECTRICAL UNITS................. 2143
Engine Compartment ....................................... 2143
Passenger Compartment ................................. 2144
HARNESS LAYOUT............................................ 2146
Main Harness ................................................... 2146
Engine Room Harness..................................... 2152
Engine Control Harness................................... 2160
Alternator Harness ........................................... 2164
Instrument Harness.......................................... 2165
Room Lamp Harness/LHD Models .................. 2166
Room Lamp Harness/RHD Models ................. 2167
Chassis Harness and Tail Harness ................. 2168
Front Door Harness (LH side) ......................... 2169
Front Door Harness (RH side)......................... 2170
WIRING DIAGRAM CODES (CELL CODES)..... 2171
WIRING DIAGRAM REFERENCE CHART
COOLING FAN .......................................................................................................... LC SECTION
ECCS, IGNITION SYSTEM, QUICK-GLOW SYSTEM, FUEL HEATER SYSTEM .. EC SECTION
ANTI-LOCK BRAKE SYSTEM .................................................................................. BR SECTION
SRS ``AIR BAG'' ........................................................................................................ RS SECTION
HEATER AND AIR CONDITIONER .......................................................................... HA SECTION
EL-2002

Use the chart below to find out what each wiring diagram code
stands for.
Refer to the wiring diagram code in the alphabetical index to find
the location (page number) of each wiring diagram.
Code Section Wiring Diagram Name
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
A/C, M HA Manual Air Conditioner
A/C, A HA Auto Air Conditioner
AT/IND EL A/T Indicator
AUDIO EL Audio
BACK/L EL Back-up Lamp
BA/FTS ATBATT/A/T Fluid Temperature Sensor
and TCM Power Supply
CHARGE EL Charging System
CHIME EL Warning Chime
CHOKE EC Automatic Choke
CIGAR EL Cigarette Lighter
CLOCK EL Clock
CMPS EC Camshaft Position Sensor
COOL/F LC Cooling Fan Control
DEF ELRear Window Defogger and Mirror
Defogger
DIMDIP ELHeadlamp Ð With Dim-dip Lamp
System
D/LOCK EL Power Door Lock
DTRL ELHeadlamp Ð With Daytime Light
System
ECTS ECEngine Coolant Temperature
Sensor
EGRC/V EC EGRC Ð Solenoid Valve
ENGSS AT Engine Speed Signal
FCUT EC Fuel Cut Solenoid Valve
F/HEAT EC Fuel Heater System
FICD EC IACV-FICD Solenoid Valve
FIPOT EC ISC-FI Pot
FPCM EC Fuel Pump Control Module
F/PUMP EC Fuel Pump
GLOW EC Quick-glow System
H/AIM EL Headlamp Aiming Control
HEATER HA Heater
H/LAMP EL Headlamp
HLC EL Headlamp Washer
HO2S EC Heated Oxygen Sensor
HORN EL Horn
H/SEAT EL Heated SeatCode Section Wiring Diagram Name
IGN EC Ignition System
IGN/SG EC Ignition Signal
ILL EL Illumination
INJECT EC Injector
INT/L EL Spot Lamp
KS EC Knock Sensor
LOAD EC Electric Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC Mass Air Flow Sensor
MAIN EC, ATMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL ECMIL and Data Link Connector For
CONSULT
MIRROR EL Power Door Mirror
MULTI EL Multi-remote Control System
NATS EL Nissan Anti-theft System
NONDTC AT Non-detectable Items
OVRCSV AT Overrun Clutch Solenoid Valve
P/ANT EL Power Antenna
PGC/V ECEVAP Canister Purge
Control Solenoid Valve
PLA EC Partial Load Advance Control
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PST/SW EC Power Steering Oil Pressure Switch
R/FOG EL Rear Fog Lamp
ROOM/L EL Interior Room Lamp
SHIFT AT Shift Lock System
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
SRS RS Supplemental Restraint System
S/SIG EC Start Signal
START EL Starting System
STOP/L EL Stop Lamp
SWL/V ECSwirl Control Valve Control Solenoid
Valve
TAIL/L EL Parking, License and Tail Lamps
TCV ATTorque Converter Clutch Solenoid
Valve
WIRING DIAGRAM CODES (CELL CODES)
EL-2171

11. Remove upper chain tensioner.
(Push in piston and insert a suitable pin into the pin hole.)
12. Wipe off the links of the timing chain next to the timing marks
on the sprockets. Put paint marks on the timing chain, match-
ing them with the timing marks on the cam sprockets and
idler sprocket.
13. Remove cam sprocket bolts, cam sprockets and upper tim-
ing chain.
IDLER SPROCKET
1. Remove upper timing chain.
Refer to ªRemovalº, ªUpper Timing Chainº, EM-2015.
2. Support lower timing chain by using a suitable tool to avoid
chain tensioner spring from coming out.
lThis step is only to be applied when the lower cover is
not being removed.
3. Remove idler sprocket.
LOWER TIMING CHAIN
1. Drain coolant by removing the cylinder block drain plug and
opening the radiator drain cock. Refer to MA section of the
Service Manual.
2. Drain engine oil from drain plug of oil pan.
3. Remove the following parts.
lAlternator drive belt
lA/C compressor drive belt
lCooling fan with coupling
lRadiator shroud
4. Remove A/C compressor and position it to the side. Remove
the idler pulley and bracket as well.
5. Set No. 1 piston to TDC on its compression stroke.
6. Remove distributor.
7. Remove the crankshaft pulley.
SEM988F
SEM989F
AEM373
TIMING CHAINKA24DE
Removal (Cont'd)
EM-2016

WARNING:
lPosition vehicle on a flat and solid surface.
lPlace chocks at front and back of rear wheels.
lDo not remove engine until exhaust system has com-
pletely cooled off.
Otherwise, you may burn yourself and/or fire may break
out in fuel line.
lBefore disconnecting fuel hose, release fuel pressure.
Refer to EC section (ªFuel Pressure Releaseº, ªBASIC
SERVICE PROCEDUREº).
lBe sure to hoist engine and transmission in a safe man-
ner.
lFor engines not equipped with engine slingers, attach
proper slingers and bolts described in PARTS CATA-
LOG.
CAUTION:
lWhen lifting engine, be sure to clear surrounding parts.
Take special care near accelerator wire casing, brake
lines and brake master cylinder.
lIn hoisting the engine, always use engine slingers in a
safe manner.
lFor 4WD models, apply sealant between engine and
transmission. Refer to MT section (ªRemoval and Instal-
lationº).
Removal
1. Drain coolant from engine block and radiator. Refer to MA
section (ªChanging Engine Coolantº, ªENGINE MAINTE-
NANCEº).
2. Release fuel pressure. Refer to EC section (ªFuel Pressure
Releaseº, ªBASIC SERVICE PROCEDUREº).
3. Remove negative battery cable.
4. Remove hood. Refer to BT section.
5. Remove air cleaner and air duct.
6. Remove power steering drive belt, alternator drive belt and
A/C compressor drive belt.
7. Remove radiator. Refer to LC section (ªRadiatorº, ªENGINE
COOLING SYSTEMº).
8. Remove exhaust manifold heat shield.
9. Disconnect exhaust system from exhaust manifold.
10. Remove A/C compressor from bracket. Refer to HA section
(ªCompressor Mountingº, ªSERVICE PROCEDURESº).
11. Disconnect accelerator wire, vacuum hoses, electrical
connectors, heater hoses and vacuum booster hose.
ENGINE REMOVALKA24DE
EM-2036

Wiring Diagram Codes (Cell Codes)
Use the chart below to find out what each wiring diagram code
stands for.
Refer to the wiring diagram code in the alphabetical index to find
the location (page number) of each wiring diagram.
Code Section Wiring Diagram Name
AAC/V EC IACV-AAC Valve
ABS BR Anti-lock Brake System
A/C HA Air Conditioner
AUDIO EL Audio
BACK/L EL Back-up Lamp
BUZZER EL Warning Buzzer
CHARGE EL Charging System
CHOKE EC Automatic Choke
CMPS EC Camshaft Position Sensor
COOL/F LC Cooling Fan Control
DEF EL Rear Window Defogger
D/LOCK EL Power Door Lock
ECTS ECEngine Coolant Temperature
Sensor
PGC/V ECCanister Purge
Control Solenoid Valve
FCUT EC Fuel Cut Solenoid Valve
FICD EC IACV-FICD Solenoid Valve
FIPOT EC ISC-FI Pot
FPCM EC Fuel Pump Control Module
F/PUMP EC Fuel Pump
F/RTN EC Fuel Return Control Solenoid Valve
GLOW EC Quick-glow System
H/LAMP EL Headlamp
HEAT HA Heater
HO2S EC Heated Oxygen Sensor
HORN EL Horn, Cigarette Lighter, Clock
IATS EC Intake Air Temperature Sensor
IDLE EC IACV-Idle Up Control
IGN EC Ignition System
IGN/SG EC Ignition SignalCode Section Wiring Diagram Name
ILL EL Illumination
INJECT EC Injector
INT/L EL Interior and Spot Lamps
MAFS EC Mass Air Flow Sensor
MAIN ECMain Power Supply and Ground Cir-
cuit
METER ELSpeedometer, Tachometer, Temp.
and Fuel Gauges
MIL/DL ECMIL and Data Link Connector For
CONSULT
MIRROR EL Power Door Mirror
P/ANT EL Power Antenna
PLA EC Partial Load Advance Control
PNP/SW EC Park/Neutral Position Switch
POWER EL Power Supply Routing
PST/SW EC Power Steering Oil Pressure Switch
SRS RS Supplemental Restraint System
S/SIG EC Start Signal
START EL Starting System
STOP/L EL Stop Lamp
SWL/V ECSwirl Control Valve Control Solenoid
Valve
TAIL/L EL Parking, License and Tail Lamps
TPS EC Throttle Position Sensor
TURN ELTurn Signal and Hazard Warning
Lamps
VSS EC Vehicle Speed Sensor
WARN EL Warning Lamps
WINDOW EL Power Window
WIPER EL Front Wiper and Washer
HOW TO READ WIRING DIAGRAMS
GI-2003

\
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

Triple-pressure switch
TerminalsHigh-pressure side line
pressure
kPa (bar, kg/cm2, psi)Operation Continuity
Low-pres-
sure side
V1-V4
Increasing to
152.0 - 201.0
(1.520 - 2.010,
1.55 - 2.05, 22.0 - 29.2)ON Exists.
Decreasing to
152.0 - 201.0
(1.520 - 2.010,
1.55 - 2.05, 22.0 - 29.2)OFFDoes not
exist.
Medium-
pressure
side*
V2-V3
Increasing to
1,422 - 1,618
(14.22 - 16.18,
14.5 - 16.5, 206 - 235)ON Exists.
Decreasing to
1,128 - 1,422
(11.28 - 14.22,
11.5 - 14.5, 164 - 206)OFFDoes not
exist.
High-pres-
sure side
V1-V4
Decreasing to
2,059 - 2,256
(20.6 - 22.6,
21 - 23, 299 - 327)ON Exists.
Increasing to
2,648 - 2,844
(26.5 - 28.4,
27 - 29, 384 - 412)OFFDoes not
exist.
*: For cooling fan motor operation
Thermo control amp.
Evaporator outlet air temperature
ÉC (ÉF)Thermo amp.
operationTester
Decreasing to 0.1 - 0.9 (32 - 34) Turn OFF Approx. 12V
Increasing to 2.5 - 3.5 (37 - 38) Turn ON Approx. 0V
Thermo switch
Water tempera-
ture
ÉC (ÉF)Terminal No.
Continuity
Å@
Over 105 (221)
V1V2
No
Less than 100
(212)Yes
RHA364GA
RHA365GA
SHA355F
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont'd)
HA-2022