1996 TOYOTA LAND CRUISER Ignition switch

IN0IO−01
BO4111
Negative Cable
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INTRODUCTION FOR ALL OF VEHICLES
IN−9
9
Author: Date:
1996 LAND CRUISER (RM451U)
FOR ALL OF VEHICLES
PRECAUTION
1. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND
SEAT BELT PRETENSIONER
(a) The LAND CRUISER is equipped with an SRS (Supple-
mental Restraint System), such as the driver airbag and
front passenger airbag assembly.
Failure to carry out service operations in the correct se-
quence could cause the supplemental restraint system to
unexpectedly deploy during servicing, possibly leading to
a serious accident.
Further, if a mistake is made in servicing the supplemental
restraint system, it is possible the SRS may fail to operate
when required. Before servicing (including removal or
installation of parts, inspection or replacement), be sure
to read the following items carefully, then follow the cor-
rect procedure described in this manual.
(b) GENERAL NOTICE (1) Malfunction symptoms of the supplemental re-straint system are difficult to confirm, so the diag-
nostic trouble codes become the most important
source of information when troubleshooting. When
troubleshooting the supplemental restraint system,
always inspect the diagnostic trouble codes before
disconnecting the battery (See page DI−240).
(2) Work must be started after 90 seconds from the
time the ignition switch is turned to the ”LOCK” posi-
tion and the negative ( −) terminal cable is discon-
nected from the battery.
(The supplemental restraint system is equipped
with a back−up power source so that if work is
started within 90 seconds of disconnecting the neg-
ative (−) terminal cable from the battery, the SRS
may deploy.)
When the negative (−) terminal cable is discon-
nected from the battery, memory of the clock and
audio systems will be cancelled. So before starting
work, make a record of the contents memorized by
the each memory system. Then when work is fin-
ished, reset the clock and audio systems as before.
To avoid erasing the memory of each memory sys-
tem, never use a back− up power supply from anoth-
er battery.
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IN04S−30
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INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN−17
17
Author: Date:
1996 LAND CRUISER (RM451U)
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
GENERAL INFORMATION
A large number of ECU controlled systems are used in the LAND CRUISER. In general, the ECU controlled
system is considered to be a very intricate system requiring a high level of t\
echnical knowledge and expert
skill to troubleshoot. However, the fact is that if you proceed to inspect the circuits one by one, trou\
bleshoot-
ing of these systems is not complex. If you have adequate understanding of the system and a basic knowl-
edge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the pr\
oblem.
This manual is designed through emphasis of the above standpoint to help service techn\
icians perform ac-
curate and effective troubleshooting, and is compiled for the following major ECU con\
trolled systems:
The troubleshooting procedure and how to make use of it are described on\
the following pages.
SystemPage
1. EngineDI−1
2. Automatic TransmissionDI−129
3. Anti− Lock Brake SystemDI−188
4. Supplemental Restraint SystemDI−238
5. Cruise Control SystemDI−284
FOR USING OBD II SCAN TOOL OR TOYOTA HAND−HELD TESTER
Before using the scan tool or tester, the scan tool’ s instruction book or tester’s operator manual should
be read thoroughly.
If the scan tool or tester cannot communicate with ECU controlled systems \
when you have connected
the cable of the scan tool or tester to DLC3, turned the ignition switch\
ON and operated the scan tool,
there is a problem on the vehicle side or tool side.
(1) If communication is normal when the tool is connected to another vehicle, \
inspect the diagnosis data link line (Bus line) or ECU power circuit of the vehicle.
(2) If communication is still not possible when the tool is connected to anoth\
er vehicle, the problem is probably in the tool itself, so perform the Self Test procedures outline in the Tester Operator’s
Manual.
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V08425
LOCKKNK
E6 Connector
(a) Remove the glove compartment (See page SF− 68).
(b) Disconnect the E6 connector from the ECM.
INSPECTION PROCEDURE
Replace knock sensor.
1 Check continuity between terminal KNK of ECM connector and body ground.
OK:
Check knock sensor (See page SF−61).
Measure
the resistance between terminal KNK of the ECM connec-
tor and body ground.
Resistance: 1 MΩ or higher
Connector being checked is connected.
 Indicates the condition of the connector of ECU during the check.
PREPARATION:
CHECK:
2
Go to step 3.
OK OK
NG
 Indicates the position of the ignition switch during the check.
Check from the connector back side.
(with harness)
Ignition Switch LOCK (OFF) Ignition Switch START
LOCKIgnition Switch ONIgnition Switch ACC
START ON
ACC

 Indicates the place to check the voltage or resistance.
 Indicates the connector position to checked, from the front or back side.
Connector being checked is disconnected.
Check from the connector front side. (without harness)
In this case, care must be taken not to bend the terminals.
E6 Connector
KNK Wire Harness
E6 Connector
KNK
A00255
AB0117
A00265
Inspection Procedure
Use the inspection procedure to determine if
the circuit is normal or abnormal, and, if it is
abnormal, use it to determine whether the
problem is
located in the sensors, actuators,
wire harness or ECU.
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INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN−27
1996 LAND CRUISER (RM451U)
(2)
(2)
~
~
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AC2RW−01
N14296
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AIR CONDITIONING WATER VALVE
AC−49
1996 LAND CRUISER (RM451U)
ADJUSTMENT
ADJUST WATER VALVE CONTROL CABLE
(a) Set the vehicle in these conditions.
Ignition switch on.
Blower speed control switch on.
Temperature control switch to ”COOL” position.
(b) Set the water valve to ”COOL” position, install the control
cable and lock the clamp.
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AC2SI−01
AC−74
−
AIR CONDITIONING AIR CONDITIONING AMPLIFIER
1401
Author: Date:
1996 LAND CRUISER (RM451U)
AIR CONDITIONING AMPLIFIER
ON−VEHICLE INSPECTION
INSPECT AMPLIFIER CIRCUIT
(a) Disconnect the amplifier and inspect the connector on the
wire harness side, as shown in the chart below.
Test conditions:
Ignition switch ON
A/C switch ON
Temperature control lever MAX COOL
Blower control switch HI
Tester connectionConditionSpecifeid condition
6 − GroundConstantContinuity
8 − 9ConstantContinuity
9 − 6ConstantApprox. 1.5 k Ω at 25 ° C (77 °F)
2 − GroundA/C switch ONBattery positive voltage
2 − GroundA/C switch OFFNo voltage
5 − GroundStart engineApprox. 10 to 14 v
5 − GroundStop engineNo voltage
If circuit is as specified, try replacing the amplifier with a new
one. If the circuit is not as specified, inspect the circuits con-
nected to other parts.
(b) Connect the connector to A/C amplifier and inspect wire
harness side connector from the back side, as shown in
the chart below.
Test conditions:
Ignition switch ON
A/C switch ON
Temperature control lever MAX COOL
Blower control switch HI
Tester connectionConditionSpecified Condition
3 − GroundRefrigeration pressure
2.0 − 32 kgf/cm3Battery positive voltage
3 − GroundRefrigeration pressure
less than 2.0 − 32 kgf/cm3 or moreNo voltage
If circuit is not as specified, replace the amplifier.
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AT0YZ−01
Z16651
Key Interlock Solenoid
Stop Light Switch Shift Lock Solenoid
Shift Lock Control Switch
Shift Lock Control ECU
Ignition Switch
Shift Lock
Control ECU
Stop Light
Switch
Shift Lock Solenoid
Key Interlock Solenoid
Shift Lock
Control Switch
Battery Stop
Light
MAIN
FL FL
ALT
FL
AM1
STOP ACC
IG ECU − IG CIG
IG ACC
STP P1
P2
P EKLS
SLS
−
SLS+
AT
−12
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AUTOMATIC TRANSMISSION SHIFT LOCK SYSTEM
796
Author: Date:
1996 LAND CRUISER (RM451U)
SHIFT LOCK SYSTEM
LOCATION
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BE1LT−01
BE−2
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BODY ELECTRICAL BODY ELECTRICAL SYSTEM
1996 LAND CRUISER (RM451U)
PROBLEM SYMPTOMS TABLE
IGNITION SWITCH AND KEY UNLOCK WARNING SWITCH
SymptomSuspect AreaSee page
Ignition switch is not set to each position.5. Ignition SwitchBE−11
”Key unlock warning system” does not operate.
1. GAUGE Fuse (I/P F/B)
2. Key Unlock Warning Switch
3. Door Courtesy Switch
4. Wire Harness−
BE−11
BE−21 −
HEADLIGHT AND TAILLIGHT SYSTEM
SymptomSuspect AreaSee page
Headlight does not light up. (Taillight is normal.)
1. Headlight Bulb
2. MAIN FL
3. HEAD (LH) Fuse (No.2 R/B)
4. HEAD (RH) Fuse (No.2 R/B)
5. Light Control Switch
6. Headlight Dimmer Switch
7. Wire Harness−
−
−
−
BE−14
BE−14
−
Headlight does not light up. (Taillight does not light up.)
1. Headlight Bulb
2. Light Control Switch
3. Headlight Dimmer Switch
4. Wire Harness−
BE−14
BE−14 −
Only one light comes ON.
1. Headlight Bulb
2. HEAD (LH) Fuse (No.2 R/B)
3. HEAD (RH) Fuse (No.2 R/B)
4. Wire Harness−
−
−
−
”Lo− Beam” does not light up.
1. Headlight Bulb
2. Headlight Control Relay (No.2 R/B)
3. Headlight Dimmer Switch
4. Wire Harness−
−
BE−14 −
”Hi− Beam” does not light up.
1. Headlight Bulb
2. Headlight Control Relay (No.2 R/B)
3. Headlight Dimmer Switch
4. Wire Harness−
−
BE−14 −
”Flash” does not light up.
1. Headlight Bulb
2. Headlight Control Relay (No.2 R/B)
3. Headlight Dimmer Switch
4. Wire Harness−
−
BE−14 −
Taillight does not light up. (Headlight is normal.)
1. Taillight Bulb
2. TAIL Fuse (I/P F/B)
3. Light Control Switch
4. Taillight Control Relay (No.2 R/B)
5. Wire Harness−
−
BE−14
BE−14 −
Taillight does not light up. (Headlight does not light up.)
1. Taillight Bulb
2. MAIN FL
3. TAIL Fuse (I/P F/B)
4. Light Control Switch
5. Wire Harness−
−
−
BE−14 −
Headlight and Taillight does not light.1. Light Control Switch
2. Wire HarnessBE−14
−
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BODY ELECTRICAL BODY ELECTRICAL SYSTEM
BE−3
1996 LAND CRUISER (RM451U)
Only one side taillight does not light.
1. Taillight Bulb
2. Wire Harness−
−
Taillight does not light.
(Headlight is normal.)
1. Taillight Bulb
2. TAIL Fuse (No.2 R/B)
3. Taillight Control Relay (No.2 R/B)
4. Light Control Switch
5. Wire Harness−
BE−14
BE−14
BE−14 −
TURN SIGNAL AND HAZARD WARNING SYSTEM
SymptomSuspect AreaSee page
”Hazard” and ”Turn” do not light up.
1. Hazard Warning Switch
2. Turn Signal Flasher (No.1 R/B)
3. Wire HarnessBE−19
BE−19
−
None of blinks for hazard. (Turn is normal.)
1. Bulb
2. Turn Signal Flasher (No.1 R/B)
3. Wire Harness−
BE−19 −
Hazard warning light does not light up. (Turn is normal.)1. HAZ − HORN Fuse (No.2 R/B)
2. Wire HarnessBE−19 −
Hazard warning light does not light up in one direction.1. Hazard Warning Switch
2. Wire HarnessBE−19−
The flashing frequency is abnormal.
1. Bulb
2. Turn Signal Flasher (No.1 R/B)
3. Wire Harness−
BE−19 −
Turn signal does not light up in one direction.1. Turn Signal Switch
2. Wire HarnessBE−19−
Only one bulb does not light up for hazard turn.1. Bulb
2. Wire Harness−
−
Turn signal does not light up.
(Combination meter, wiper and washer do not operate.)
1. Ignition Switch
2. TURN Fuse (I/P F/B)
3. Turn Signal Switch
4. Wire HarnessBE−11
BE−19
BE−19 −
Turn signal does not light up.
(Combination meter, wiper and washer are normal.)1. TURN Fuse (I/P F/B)
2. Turn Signal Switch
3. Wire HarnessBE−19
BE−19−
INTERIOR LIGHT SYSTEM
SymptomSuspect AreaSee page
Room light does not light up.
1. DOME Fuse (No.2 R/B)
2. Door Courtesy Switch
3. Front Personal Light
4. Room Light Assembly
5. Bulb
6. Wire Harness−
BE−21
BE−21
BE−21 −
−
Room light remains always on.1. Door Courtesy Switch
2. Wire HarnessBE−21
−
BACK −UP LIGHT SYSTEM
SymptomSuspect AreaSee page
Back−Up light does not light up.
1. GAUGE Fuse (I/P F/B)
2. Ignition Switch
3. Park/Neutral Position Switch (A/T)
4. Bulb
5. Wire Harness−
BE−11 −
−
−
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