engine coolant TOYOTA LAND CRUISER 1996 J80 Workshop Manual

 DTC No.
Indicates the diagnostic trouble code.
 Page or Instructions
Indicates the page where the inspection procedure
for each circuit is to be found, or gives instructions
for checking and repairs. Detection Item
Indicates the system of the problem or
contents of the problem.  Trouble Area
Indicates the suspect area of the
problem.
Mass
Air Flow Circuit MalfunctionDetection Item
 Open or short in mass air flow meter circuit
 Mass air flow meter
 ECM
DTC No.
(See page)
Trouble Area
MIL* MemoryP0100
(DI−24)
P0101
(DI−28)
P0115
(DI−33)  Open or short in intake air temp. sensor
circuit
 Intake air temp. sensor
 ECM
Intake Air Temp. Circuit
Malfunction
P0110
(DI−29)
 Open or short in engine coolant temp. sensor circuit
 Engine coolant temp. sensor
 ECM
Throttle/ Pedal Position Sensor/Switch
”A” Circuit MalfunctionEngine Coolant Temp.
Circuit Malfunction
 Open or short in throttle position sensor circuit
 Throttle position sensor
 ECM
HINT:
Parameters listed in the chart may not be exactly the same as your readi\
ng due to the type of instrument or other
factors.
If a malfunction code is displayed during the DTC check mode, check the circ\
uit for the code listed in the table
below. For details of each code, turn to the page referred to under the ”See\
page” for the respective ”DTC No.”
in the DTC chart.
Mass Air Flow Circuit
Range/ Performance Problem Mass air flow meter
 Throttle position sensor
Throttle/
Pedal Position Sensor/ Switch
”A” Circuit Range / Performance Prob-
lem
P0116
(DI−37)
Engine Coolant Temp.
Circuit
Range/ Performance Problem Engine coolant temp. sensor
 Cooling system
SAE CONTROLLED
DIAGNOSTIC TROUBLE CODE CHART
IN−24−
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 LAND CRUISER (RM451U)
4. DIAGNOSTIC TROUBLE CODE CHART
The inspection procedure is shown in the table below. This ta ble permits efficient and accurate troubleshoot-
ing using the diagnostic trouble codes displayed in the diagnostic trouble code check. Proceed with trouble-
shooting in accordance with the inspection procedure given in the diagnostic cha\
rt corresponding to the
diagnostic trouble codes displayed. The engine diagnostic trouble code chart is sho\
wn below as an example.
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IN0CI−02
IN−38
−
INTRODUCTION TERMS
1996 LAND CRUISER (RM451U)
GLOSSARY OF SAE AND TOYOTA TERMS
This glossary lists all SAE− J1930 terms and abbreviations used in this manual in compliance with SAE\
rec-
ommendations, as well as their TOYOTA equivalents.
SAE
ABBREVIATIONSSAE TERMSTOYOT A TERMS
( ) −−ABBREVIA TIONS
A/CAir ConditioningAir Conditioner
ACLAir CleanerAir Cleaner, A/CL
AIRSecondary Air InjectionAir Injection (AI)
APAccelerator Pedal−
B+Battery Positive Voltage+B, Battery Voltage
BAROBarometric PressureHAC
CACCharge Air CoolerIntercooler
CARBCarburetorCarburetor
CFIContinuous Fuel Injection−
CKPCrankshaft PositionCrank Angle
CLClosed LoopClosed Loop
CMPCamshaft PositionCam Angle
CPPClutch Pedal Position−
CTOXContinuous T rap Oxidizer−
CTPClosed Throttle PositionLL ON, Idle ON
DFIDirect Fuel Injection (Diesel)Direct Injection (DI)
DIDistributor Ignition−
DLC1
DLC2
DLC3Data Link Connector 1
Data Link Connector 2
Data Link Connector 31: Check Connector
2: Total Diagnosis Comunication Link (TDCL)
3: OBD II Diagnostic Connector
DTCDiagnostic Trouble CodeDiagnostic Code
DTMDiagnostic Test Mode−
ECLEngine Control Level−
ECMEngine Control ModuleEngine ECU (Electronic Control Unit)
ECTEngine Coolant T emperatureCoolant Temperature, Water Temperature (THW)
EEPROMElectrically Erasable Programmable Read Only Memory
Electrically Erasable Programmable Read Only Memory
(EEPROM),
Erasable Programmable Read Only Memory (EPROM)
EFEEarly Fuel EvaporationCold Mixture Heater (CMH), Heat Control Valve (HCV)
EGRExhaust Gas RecirculationExhaust Gas Recirculation (EGR)
EIElectronic IgnitionTOYOTA Distributorless Ignition (TDI)
EMEngine ModificationEngine Modification (EM)
EPROMErasable Programmable Read Only MemoryProgrammable Read Only Memory (PROM)
EVAPEvaporative EmissionEvaporative Emission Control (EVAP)
FCFan Control−
FEEPROMFlash Electrically Erasable Programmable
Read Only Memory−
FEPROMFlash Erasable Programmable Read Only Memory−
FFFlexible Fuel−
FPFuel PumpFuel Pump
GENGeneratorAlternator
GNDGroundGround (GND)
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AC2QC−03
−
AIR CONDITIONING AIR CONDITIONING SYSTEM
AC−3
1996 LAND CRUISER (RM451U)
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem.The numbers i\
ndicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.
SymptomSuspect AreaSee page
No blower operation
4. HTR Fuse
5. Heater main relay
6. Blower motor
7. Blower resistor
8. Blower speed control switch
9. Wire harness−
AC−64
AC−52
AC−57
AC−69 −
No air temperature control
1. Engine coolant volume
2. A/C control assembly
3. Water valve−
AC−69
AC−49
No compressor operation
1. Refrigerant volume
2. A.C Fuse
3. Magnetic clutch
4. Compressor
5. Pressure switch
6. Heater main relay
7. Blower speed control switch
8. A/C switch
9. A/C amplifier
10.Thermistor
11. Wire harnessAC−5 −
AC−33
AC−33
AC−61
AC−64
AC−69
AC−69
AC−74
AC−60 −
Compressor operates intermitently
1. Refrigerant volume
2. Pressure switch
3. A/C amplifier
4. Thermistor
5. Wire harnessAC−5
AC−61
AC−74
AC−60 −
No cool air comes out
1. Refrigerant volume
2. Refrigerant pressure
3. Drive belt
4. Magnetic clutch
5. Compressor
6. Pressure switch
7. Thermistor
8. A/C switch
9. A/C amplifier
10.A/C control assembly
11. Wire harnessAC−5
AC−5
AC−15
AC−33
AC−33
AC−61
AC−60
AC−69
AC−74
AC−69 −
Cool air comes out only at high engine rpm
1. Refrigerant volume
2. Drive bel
3. Magnetic clutch
4. Compressor
5. Condenser
6. Receiver
7. Expansion valve
8. Evaporator
9. Thermistor
10.A/C amplifier
11. Wire harnessAC−5
AC−15
AC−33
AC−33
AC−42
AC−39
AC−47
AC−45
AC−60
AC−74 −
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AC−4
−
AIR CONDITIONING AIR CONDITIONING SYSTEM
1996 LAND CRUISER (RM451U)
Insuf
ficient cooling
1. Refrigerant volume
2. Drive belt
3. Magnetic clutch
4. Compressor
5. Condenser
6. Receiver
7. Expansion valve
8. Evaporator
9. Refrigerant line
10.Pressure switch
11. A/C amplifier
12.A/C control assemblyAC−5
AC−15
AC−33
AC−33
AC−42
AC−39
AC−47
AC−45
AC−20
AC−61
AC−74
AC−69
No engine idle up when A/C switch ON
1. A/C amplifier
2. ECM
3. Wire harnessAC−74 −
−
No warm air comes out
1. Engine coolant volume
2. A/C control assembly
3. Water valve
4. Heater radiator−
AC−69
AC−49
AC−46
A/C indicator does not light up when mode lever at DEF. position
1. Defroster mode switch
2. A/C switch
3. Wire harnessAC−69
AC−69 −
Rear heater:
SymptomSuspect AreaSee page
No blower operation
1. RR HTR Fuse
2. Rear heater relay
3. Rear heater switch
4. Rear blower motor
5. Rear blower resistor−
AC−65
AC−77
AC−55
AC−58
No warm air come out1. Engine coolant volume
2. Rear heater radiator−
AC−46
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AC3JL−01
−
AIR CONDITIONING COOLING UNIT
AC−23
1350
Author: Date:
1996 LAND CRUISER (RM451U)
COOLING UNIT
COMPONENTS
v
~+Packing
Engine Coolant
Temp. CutRelay
NCAmphfier------'>...,.J)
Thermistor
LowerUnitCase----"
+Non-reusable part
"JI'b,.;:y•.?~-----UpperUnitCase
c-----+Packing
Expansion Valve
~Gromet
o«'-----DrainHose
~~~paCking
A~,,~V~..~':'-'-"~--BlowerResistor'~N14361
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AC2QS−01
Z17942
Hose ”A”Hose ”B”
Z17943
Hose Clip
Heater
Radiator Pope Paint Mark
Water Hose Hose ”A”Upper
FR
RH Hose ”B”
RH
FR
Marking 45 ± 10° 45
°
10 °
N06494
AC−28
−
AIR CONDITIONING HEATER UNIT
1355
Author: Date:
1996 LAND CRUISER (RM451U)
HEATER UNIT
REMOVAL
1. REMOVE COOLING UNIT (See page AC−24)
2. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all the coolant.
3. DISCONNECT WATER HOSES FROM HEATER RA- DIATOR PIPES
(a) Grip the claws of the hose clip with pliers and slide the clip
along the hose to a place where it does not clamp the
hose to the pipe.
(b) Disconnect the water hoses.
HINT:
Push the water hose onto the heater radiator pipe as far
as the ridge on the pipe.
Install the hose clip in a position, as shown in the illustra-
tion.
4. REMOVE PIPE GROMMETS
5. REMOVE INSTRUMENT PANEL SAFETY PAD (See page BO−76 )
6. REMOVE INSTRUMENT PANEL REINFORCEMENT
(See page BO−76 )
7. REMOVE HEATER UNIT
(a) Remove the 3 screws and defroster nozzle.(...~---------I I
I II II I
I II IIIv-
N02485
N18179N18181
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AC2RU−01
Z17944
Hose ”A”
Hose ”B”
Z19353
Hose Clip
Heater
Radiator
Pipe Paint
Water Hose Upper Upper
Fr RH
Marking Hose ”A”
Hose ”B”
45°
AC−48
−
AIR CONDITIONING WATER VALVE
1375
Author: Date:
1996 LAND CRUISER (RM451U)
WATER VALVE
REMOVAL
1. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all the coolant.
2. DISCONNECT WATER VALVE CONTROL CABLE
3. DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPE AND WATER VALVE
(a) Grip the claws of the hose clip with pliers and slide the clip
along the hose to a place where it does not clamp the
hose to the pipe.
(b) Disconnect the water hoses.
HINT:
ATt the time of installation, refer to the following procedure.
Push the water hose onto the heater radiator pipe as far
as ridge on the pipe.
Install the hose clip in a position, as shown in the illustra-
tion.
4. REMOVE WIRE HARNESS PROTECTOR
5. REMOVE WATER VALVE
Remove the 2 bolts and water valve.
N02485N18180N18181
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N06549
AC2SH−01
V02084OFFON
103 °C (217° F)
108
°C (226° F)
−
AIR CONDITIONING ENGINE COOLANT TEMPERATURE (ECT) CUT
RELAYAC−67
1394
Author: Date:
1996 LAND CRUISER (RM451U)
ENGINE COOLANT
TEMPERATURE (ECT) CUT RELAY
INSPECTION
INSPECT SWITCH CONTINUITY
Check the continuity betweeen terminals of the switch, as
shown in the chart below.
If continuity is not as specified, replace the switch.
_tf
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BE−4
−
BODY ELECTRICAL BODY ELECTRICAL SYSTEM
1996 LAND CRUISER (RM451U)
Back−
Up light remains on.
1. Park/Neutral Position Switch (A/T)
2. Wire Harness−
−
Only one light does not light up.1. Bulb
2. Wire Harness−
−
STOP LIGHT SYSTEM
SymptomSuspect AreaSee page
Stop light does not light up.
1. STOP Fuse (I/P F/B)
2. Stop Light Switch
3. Bulb
4. Wire Harness−
BE−25 −
−
Stop light remains always on.1. Stop Light Switch
2. Wire HarnessBE−25−
Only one light does not light up.1. Wire Harness
2. Bulb−
−
WIPER AND WASHER SYSTEM
SymptomSuspect AreaSee page
Wipers do not operate or return to off position.
1. WIPER Fuse (I/P F/B)
2. Wiper Switch
3. Wiper Motor
4. Wiper Relay
5. Wire HarnessBE−27
BE−27
BE−27
BE−27
−
Wipers do not operate in MIST.
1. Wiper Switch
2. Wiper Motor
3. Wiper Relay
4. Wire HarnessBE−27
BE−27
BE−27
−
Wipers do not operate in INT.
1. Wiper Switch
2. Wiper Motor
3. Wiper Relay
4. Wire HarnessBE−27
BE−27
BE−27−
Washer does not operate.
1. Washer Hose or Nozzle Clogged
2. Washer Switch
3. Washer Motor
4. Wire Harness−
BE−27
BE−27 −
METER, GAUGES AND ILLUMINATION:
COMBINATION METER
SymptomSuspect AreaSee page
Tachometer, speedometer, engine coolant temperature gauge and
fuel gauge do not operate.1. GAUGE Fuse (I/P F/B)
2. Meter Circuit
3. Wire Harness−
BE−32 −
Speedometer does not operate.
1. No.1 Vehicle Speed Sensor
2. Speedometer Driven Gear and Drive Gear
3. Meter Circuit
4. Wire HarnessBE−34−
BE−32 −
Tachometer does not operate.
1. Meter Circuit
2. Igniter
3. Wire HarnessBE−32−
−
Tachometer does not operate.
1. Meter Circuit
2. Igniter
3. Wire HarnessBE−32−
−
Voltmeter does not operate.1. Voltmeter Receiver Gauge
2. Wire HarnessAT −6
−
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−
BODY ELECTRICAL BODY ELECTRICAL SYSTEM
BE−5
1996 LAND CRUISER (RM451U)
Fuel gauge does not operate or abnormal operation.
1. Fuel Receiver Gauge
2. Fuel Sender Gauge
3. Meter Circuit
4. Wire HarnessBE−34
BE−34
BE−32
−
Engine coolant temperature gauge does not operation or
abnormal operate.
1. Engine Coolant Temperature Receiver Gauge
2. Engine Coolant Temperature Sender Gauge
3. Meter Circuit
4. Wire HarnessBE−34
BE−34
BE−32−
Oil pressure gauge does not operate or abnormal operation.
1. Oil Pressure Receiver Gauge
2. Oil Pressure Sender Gauge
3. Meter Circuit
4. Wire HarnessBE−34
BE−34
BE−34−
All illumination lights do not light up.
1. TAIL Fuse (I/P F/B)
2. Light Control Rheostat
3. Wire Harness−
BE−34 −
Brightness does not change even when rheostat turned.1. Bulb
2. Wire Harness−
−
Only one illumination light does not light up.1. Bulb
2. Wire Harness−
−
WARNING LIGHTS:
COMBINATION METER
SymptomSuspect AreaSee page
Warning lights do not lights up.
(Except discharge, SRS and door open)1. GAUGE Fuse (I/P F/B)
2. Meter Circuit
3. Wire Harness−
BE−32 −
Brake warning light does not light up.
1. Bulb
2. Brake Fluid Level Switch
3. Parking Brake Switch
4. Meter Circuit
5. Wire Harness−
BE−34
BE−34
BE−32 −
Open door warning light does not light up.
1. Bulb
2. Door Courtesy Switch
3. DOME Fuse (No.2 R/B)
4. Meter Circuit
5. Wire Harness−
BE−21
BE−21 −
−
−
SRS warning light does not light up
1. Bulb
2. Airbag Sensor Assembly
3. ECU− B Fuse (I/P F/B)
4. Meter Circuit
5. Wire Harness−
−
−
BE−32 −
Discharge warning light does not light up.
1. Bulb
2. IGN Fuse (No.1 J/B)
3. Generator
4. Meter Circuit
5. Wire Harness−
−
−
BE−32 −
Seat belt warning light does not light up.
1. Bulb
2. Seat Belt Buckle Switch
3. Seat Belt Warning Relay (I/P F/B)
4. Meter Circuit
5. Wire Harness−
BE−34 −
BE−32 −
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