turn signal TOYOTA LAND CRUISER 1996 J80 Workshop Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 1996, Model line: LAND CRUISER, Model: TOYOTA LAND CRUISER 1996 J80Pages: 1399, PDF Size: 41.35 MB
Page 22 of 1399
DIAGNOSTIC TROUBLE CODE CHECK PROCEDURE
Diagnostic Trouble
Code Check (Make a
note of and then clear) Confirmation
of Symptoms
Diagnostic Trouble
Code Check
Problem Condition
Diagnostic Trouble
Code Display Problem symptoms
exist
Same diagnostic
trouble code is
displayed Problem is
still occurring in the diagnostic
circuit
Normal code is
displayed The problem is still occurring in a place
other than in the diagnostic circuit
(The diagnostic trouble code displayed
first is either for a past problem or it is a
secondary problem)
No problem
symptoms exist
The problem occurred in the diagnostic
circuit in the past
Normal Code Display Problem symptoms
existNormal code is
displayed The problem is still occurring in a place
other than in the diagnostic circuit
No problem
symptoms exist
Normal code is
displayed The problem occurred in a place other
than in the diagnostic circuit in the past
IN−20−
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 LAND CRUISER (RM451U)
2. SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE CHECK
The diagnostic system in the LAND CRUISER fulfills various functions. The first functio\
n is the Diagnostic
Trouble Code Check in which a malfunction in the signal circuits to the ECU is stored in co\
de in the ECU
memory at the time of occurrence, to be output by the technician during troubl\
eshooting. Another function
is the Input Signal Check which checks if the signals from various switc\
hes are sent to the ECU correctly.
By using these check functions, the problem areas can be narrowed down qui\
ckly and troubleshooting can
be performed ef fectively. Diagnostic functions are incorporated in the following systems in the LAND CRUIS-
ER.
SystemDiagnostic Trouble
Code CheckInput Signal Check(Sensor Check)Diagnostic Test
Mode (Active Test)
1. Engine
(with Check Mode)
2. Automatic T ransmission
(with Check Mode)
3. Anti− Lock Brake System
4. Supplemental Restraint System
5. Cruise Control System
In diagnostic trouble code check, it is very important to determine whethe\
r the problem indicated by the diag-
nostic trouble code is still occurring or occurred in the past but returned to\
normal at present. In addition,
it must be checked in the problem symptom check whether the malfunction \
indicated by the diagnostic
trouble code is directly related to the problem symptom or not. For this reason, the \
diagnostic trouble codes
should be checked before and after the symptom confirmation to determine the curre\
nt conditions, as shown
in the table below. If this is not done, it may, depending on the case, result in unnecessary troubleshooting
for normally operating systems, thus making it more difficult to locate the problem, or in repairs not pertinent
to the problem. Therefore, always follow the procedure in correct order an\
d perform the diagnostic trouble
code check.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 147 of 1399
−
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 −
−
−
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 162 of 1399
BE1M1−01
BE−18
−
BODY ELECTRICAL TURN SIGNAL AND HAZARD WARNING SYSTEM
1156
Author: Date:
1996 LAND CRUISER (RM451U)
TURN SIGNAL AND HAZARD WARNING SYSTEM
LOCATION
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 163 of 1399
BE27G−01
BE1843
−
BODY ELECTRICAL TURN SIGNAL AND HAZARD WARNING SYSTEM
BE−19
1996 LAND CRUISER (RM451U)
INSPECTION
1. INSPECT HAZARD WARNING SWITCH CONTINUITY
ConditionTester connectionSpecified condition
Switch OFF7 − 10Continuity
Switch ON7 − 8
4 − 5 − 6 − 9Continuity
Illumination circuit2 − 3Continuity
If continuity is not as specified, replace the switch.
2. INSPECT TURN SIGNAL FLASHER OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2 and the negative ( −) lead to terminal 3.
(b) Connect the 2 turn signal light bulbs parallel to each other
to terminals 1 and 3, and check that the bulbs flash.
HINT:
The turn signal lights should flash 60 to 120 times per minute.
If one of the front or rear turn signal lights has an open circuit,
the number of flashes will be more than 140 per minute.
If operation is not as specified, replace the flasher.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 199 of 1399
−
BODY ELECTRICAL POWER DOOR LOCK CONTROL SYSTEM
BE−55
1996 LAND CRUISER (RM451U)9 −
Ground
Driver’s door key lock and unlock switch position
UNLOCK (Door key turned to unlock)Continuity
10 − GroundDoor lock manual switch position OFF or
UNLOCKNo continuity
10 − GroundDoor lock manual switch position LOCKContinuity
11 − Ground
Door lock manual switch and passenger’s door
key lock and unlock switch position OFF or
UNLOCK
No continuity
11 − GroundDoor lock manual switch and passenger’s door
key lock and unlock switch position UNLOCKContinuity
12 − Ground
Driver’s and passenger’s door key lock and
unlock switch position OFF or UNLOCK (Door
key free or turned to unlock)
No continuity
12 − GroundDriver’s or passenger’s door key lock and unlock
switch position LOCK (Door key turned to lock)Continuity
14 − GroundPassenger’s door courtesy switch position OFF
(Door closed)No continuity
14 − GroundPassenger’s door courtesy switch position ON
(Door opened)Continuity
16 − GroundConstantContinuity
1 − GroundIgnition switch position LOCK or ACCNo voltage
1 − GroundIgnition switch position ONBattery positive voltage
8 − GroundConstantBattery positive voltage
If circuit is as specified, inspect the door lock signal.
If the circuit is not as specified, inspect the circuits connected
to other parts.
11. INSPECT DOOR LOCK SIGNAL
HINT:
When the relay circuit is as specified, inspect the door lock sig-
nal.
(a) Connect the connector to the relay.
(b) Connect the positive (+) lead from the voltmeter to termi-
nal 3 and the negative ( −) lead to terminal 4.
(c) Set the door lock manual switch to UNLOCK, and check
that the voltage rises from 0 V to battery positive voltage
for approximately 0.2 seconds.
(d) Reverse the polarity of the voltmeter leads.
(e) Set the door lock manual switch to LOCK, and check that the voltage rises from 0 V to battery positive voltage for
approximately 0.2 seconds.
If operation is not as specified, replace the relay.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 200 of 1399
BE−56
−
BODY ELECTRICAL POWER DOOR LOCK CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
12. NSPECT KEY−OFF POWER WINDOW SIGNAL
HINT:
When the relay circuit is as specified, inspect the key −off power
window signal.
(a) Connect the connector to the relay.
(b) Connect the positive (+) lead from the voltmeter to termi- nal 15 and the negative ( −) lead to terminal 16.
(c) Close the door with ignition switch truned to LOCK or ACC, check that the meter needle indicates battery posi-
tive voltage.
(d) Open the door, check that the meter needle indicates 0 V.
(e) Turn the ignition switch ON, check that the meter needle
indicate battery positive voltage again.
If operation is not as specified, replace the relay.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 442 of 1399
P22215
−
DIAGNOSTICS ENGINE
DI−5
1996 LAND CRUISER (RM451U)
Terminal No.
Connection / Voltage or ResistanceCondition
2Bus
Line / Pulse generationDuring transmission
4Chassis Ground / ↔ Body Ground 1 Ω or lessAlways
5Signal Ground / ↔ Body Ground 1 Ω or lessAlways
16Battery Positive / ↔ Body Ground 9 − 14 VAlways
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of the OBD II scan tool or
TOYOTA hand−held tester to DLC3, turned the ignition switch
ON and operated the scan tool, there is a problem on the ve-
hicle side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool’s instruction manual.
2. INSPECT DIAGNOSIS (NORMAL MODE)
(a) Check the MIL. (1) The MIL comes on when the ignition switch is turnedON and the engine is not running.
HINT:
If the MIL does not light up, troubleshoot the combination meter
(See page BE−2 ).
(2) When the engine started, the MIL should go off. If the lamp remains on, the diagnosis system has de-
tected a malfunction or abnormality in the system
(b) Check the DTC.
NOTICE:
TOYOTA hand−held tester only: When the diagnosis sys-
tem is switched from normal mode to check mode, it
erases all DTCs and freezed frame data recorded in normal
mode. So before switching modes, always check the DTCs
and freezed frame data, and note them down (1) Prepare the OBD II scan tool (complying with SAE
J 1978) or TOYOTA hand−held tester.
(2) Connect the OBD II scan tool or TOYOTA hand− held tester to DLC3 in the fuse box at the lower left
of the instrument panel.
(3) Turn the ignition switch ON and switch the OBD II
scan tool or TOYOTA hand −held tester switch ON.
(4) Use the OBD II scan tool or TOYOTA hand−held tester to check the DTC and freezed frame data,
note them down. (For operating instructions, see
the OBD II scan tool’s instruction book.)
(5) See page DI−13 to confirm the details of the
DTCs.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 444 of 1399
−
DIAGNOSTICS ENGINE
DI−7
1996 LAND CRUISER (RM451U)
(10) After checking the DTC, inspect the applicable cir-
cuit.
(b) Clear the DTC.
The following actions will erase the DTCs and freezed
frame data.
(1) Operating the OBD II scan tool (complying with SAE
J1978) or TOYOTA hand−held tester to erase the
codes. (See the OBD II scan tool’ s instruction book
for operating instructions.)
(2) Disconnecting the battery terminals or EFI fuse.
NOTICE:
If the TOYOTA hand −held tester switches the ECM from
normal mode to check mode or vice −versa, or if the igni-
tion switch is turned from ON to ACC or LOCK during check
mode, the DTCs and freezed frame data will be erased.
4. FAIL−SAFE CHART
If any of the following codes is recorded, the ECM enters fail −safe mode.
DTC No.Fail−Safe OperationFail− Safe Deactivation Conditions
P0100Ignition timing fixed at 5 ° BTDC
Injection method fixed at simultaneous injectionReturned to normal condition
P0110Intake air temp. is fixed at 20° C (68°F)Returned to normal condition
P0115Engine coolant temp. is fixed at 80 °(176°F)Returned to normal condition
P0120VTA is fixed at 0°
The following condition must be repeated at least 2 times
consecutively
When closed throttle position switch is ON:
0.1 V VTA 0.95 V
P0135
P0141The heater circuit in witch an abnormality is detected is
turned offIgnition switch OFF
P0325
P0330Max. timing retardationIgnition switch OFF
P1300Fuel cutIGF signal is detected for 6 consective ignitions
P1605Max. timing retardationReturned to normal condition
5. CHECK FOR INTERMITTENT PROBLEMS
TOYOTA hand−held tester only:
By putting the vehicle’s ECM in check mode, 1 trip detection logic is possible instead of 2 trip detection logic
and sensitivity to detect open circuits is increased. This makes it easier \
to detect intermittent problems.
(1) Clear the DTC (See step 2).
(2) Set the check mode (See step 3).
(3) Perform a simulation test (See page IN−18).
(4) Check the connector and terminal (See page IN−28).
(5) Handle the connector (See page IN−28).
(6) Visual check and contact pressure (See page IN−28).
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 506 of 1399
P22417
Exhaust
Gas
Intake Air
Chamber EGR
Valve
VSV
EGR
Vacuum
Modulator
ECM
Throttle
valve
P22426
BR
From Battery R/B No.2
R−Y
2
222
2
2
Y−R
EFI Main
Y−R
1
2
43
REA2
EZ1
EB12 7
VSV for EGR 21
YYL
−W
EZ14
EGR Gas T emp.
Sensor
21
G−Y
BR−BE7 E4
E4
E5 3
22
19
9
THG
E1
EGR
E2 5V
MRLY
ECM
R
EB
EFI
1
Relay
B+
E01
−
DIAGNOSTICS ENGINE
DI−69
1996 LAND CRUISER (RM451U)
DTC P0401 Exhaust Gas Recirculation Flow Insufficient
Detected
CIRCUIT DESCRIPTION
The EGR system recirculates exhaust gas, which is controlled to the proper \
quantity to suit the driving condi-
tions, into the intake air mixture to slow down combustion, reduce the combust\
ion temp. and reduce NOx
emissions. The amount of EGR is regulated by the EGR vacuum modulator ac\
cording to the engine load.
If even one of the following conditions is fulfilled, the VSV is
turned ON by a signal from the ECM.
This results in atmospheric air acting on the EGR valve, closing
the EGR valve and shutting off the exhaust gas (EGR cut− off).
Under the following conditions, EGR is cut to maintain driveabil-
ity.
Before the engine is warmed up.
During deceleration (throttle valve closed).
Light engine load (amount of intake air very small).
Engine racing.
DTC No.DTC Detecting ConditionTrouble Area
P0401
After the engine is warmed up and run at 80 km/h (50 mph)
for 3 to 5 minutes, the EGR gas temperature sensor value
does not exceed 38° C (100.4°F) above the ambient air tem-
perature. (2 trip detection logic) EGR valve stuck closed
Short in VSV circuit for EGR
Open in EGR gas temp. sensor circuit
EGR hose disconnected
ECM
WIRING DIAGRAM
DI5PK−02
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010
Page 526 of 1399
P22234
From
Air
CleanerSignals ECM IAC ValveValve ShaftRotor
To Cylinders
Throttle Valve
Intake Air
Chamber
Coils
Valve
−
DIAGNOSTICS ENGINE
DI−89
1996 LAND CRUISER (RM451U)
DTC P0505 Idle Control System Malfunction
CIRCUIT DESCRIPTION
The step motor type IAC valve is located in front of the intake
air chamber. Intake air bypassing the throttle valve is directed
to the IAC valve through a passage. A step motor is built into
the IAC valve. It consists of four coils, a magnetic rotor, valve
shaft and valve. When current flows to the coils due to signals
from the ECM, the rotor turns and moves the valve shaft forward
or backward, changing the clearance between the valve and
the valve seat. In this way the intake air volume bypassing the
throttle valve is regulated, controlling the engine speed. There
are 125 possible positions to which the valve can be opened.
DTC No.DTC Detecting ConditionTrouble Area
P0505Idle speed continues to vary greatly from the target speed
(2 trip detection logic)
IAC valve is stuck or closed
Open or short in IAC valve circuit
Open or short in A /C signal circuit
Air intake (hose loose)
DI5PO−02
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010