No spark TOYOTA LAND CRUISER 1996 J80 Workshop Manual

−
INTRODUCTION FOR ALL OF VEHICLES
IN−15
15
Author: Date:
1996 LAND CRUISER (RM451U)
3. FOR VEHICLES EQUIPPED WITH A CATALYTIC CONVERTER
CAUTION:
If large amount of unburned gasoline flows into the converter, it may overheat and create a fire haz-
ard. To prevent this, observe the following precautions and explain them to yo\
ur customer.
(a) Use only unleaded gasoline.
(b) Avoid prolonged idling.
Avoid running the engine at idle speed for more than 20 minutes.
(c) Avoid spark jump test. (1) Perform spark jump test only when absolutely necessary. Perform this test as rapidly as possible.
(2) While testing, never race the engine.
(d) Avoid prolonged engine compression measurement. Engine compression tests must be done as rapidly as possible.
(e) Do not run engine when fuel tank is nearly empty. This may cause the engine to misfire and create an extra load on the con\
verter.
(f) Avoid coasting with ignition turned off.
(g) Do not dispose of used catalyst along with parts contaminated with gasol\
ine or oil.
4. IF VEHICLE IS EQUIPPED WITH MOBILE COMMUNICATION SYSTEM
For vehicles with mobile communication systems such as two− way radios and cellular telephones, observe
the following precautions. (1) Install the antenna as far as possible away from the ECU and sensors of the vehicle’\
s electronic
system.
(2) Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and se\
nsors of the ve- hicle’s electronic systems. For details about ECU and sensors locations, refer\
to the section on
the applicable component.
(3) Avoid winding the antenna feeder together with other wiring as much as possible, and also avoid
running the antenna feeder parallel with other wire harnesses.
(4) Check that the antenna and feeder are correctly adjusted.
(5) Do not install powerful mobile communications system.
5. FOR USING OBD II SCAN TOOL OR TOYOTA HAND −HELD TESTER
CAUTION:
Observe the following items for safety reasons:
Before using the OBD II scan tool or TOYOTA hand −held tester, the OBD II scan tool’s instruc-
tion book or TOYOTA hand −held tester’s operator manual should be read thoroughly.
Be sure to route all cables securely when driving with the OBD II scan too\
l or TOYOTA hand −
held tester connected to the vehicle. (i.e. Keep cables away from feet,\
pedals, steering wheel
and shift lever.)
Two persons are required when test driving with the OBD II scan tool or TOYOTA hand −held
tester, one person to drive the vehicle and the other person to operate the OBD\
II scan tool or
TOYOTA hand−held tester.
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IN−34
−
INTRODUCTION TERMS
34
Author: Date:
1996 LAND CRUISER (RM451U)
CW
Curb W
eight
DCDirect Current
DEFDefogger
DFLDeflector
DIFF.Differential
DIFF. LOCKDifferential Lock
D/INJDirect Injection
DLIDistributorless Ignition
DOHCDouble Over Head Cam
DPDash Pot
DSDead Soak
DSPDigital Signal Processor
EBDElectronic Brake Force Distribution
ECAMEngine Control And Measurement System
ECDElectronic Controlled Diesel
ECDYEddy Current Dynamometer
ECUElectronic Control Unit
EDElectro−Deposited Coating
EDICElectric Diesel Injection Control
EDUElectronic Driving Unit
EFIElectronic Fuel Injection
E/GEngine
EGR−VMExhaust Gas Recirculation −Vacuum Modulator
ELREmergency Locking Retractor
ENGEngine
ESAElectronic Spark Advance
ETCSElectronic Throttle Control System
EVPEvaporator
E−VRVElectric V acuum Regulating V alve
EXHExhaust
FEFuel Economy
FFFront−Engine Front− Wheel−Drive
F/GFuel Gage
FIPGFormed In Place Gasket
FLFusible Link
F/PFuel Pump
FPUFuel Pressure Up
FrFront
FRFront−Engine Rear− Wheel−Drive
F/WFlywheel
FW/DFlywheel Damper
FWDFront−Wheel−Drive
GASGasoline
GSAGear Shift Actuator
GNDGround
HACHigh Altitude Compensator
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P09401
P22893
DI−10
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
OK
Proceed to matrix chart of problem symp-
toms on page DI−19.
7 Check fuel pressure.
PREPARATION:
(a) Be sure that enough fuel is in the tank.
(b) Connect the TOYOTA hand−held tester to the DLC3.
(c) Turn ignition switch ON and push TOYOTA hand −held
tester main switch ON.
(d) Use ACTIVE TEST mode to operate the fuel pump.
(e) If you have no TOYOTA hand−held tester, connect the positive (+) and negative (−) leads from the battery to the
fuel pump connector (See page SF−6).
CHECK:
Check for fuel pressure in the fuel return hose when it is pinched
off.
HINT:
At this time, you will hear a fuel flowing noise.
NG Proceed to page SF−6 and continue to trouble-
shoot.
OK
8 Check for spark.
PREPARATION:
(a) Remove No.2 and No.3 cylinder head cover.
(b) Disconnect high −tension cord from spark plug.
(c) Remove spark plug.
(d) Install the spark plug to the high −tension cord.
(e) Ground the spark plug.
(f) Disconnect injector connector.
CHECK:
Check if spark occurs while engine is being cranked.
NOTICE:
To prevent excess fuel being injected from the injectors
during this test, don’t crank the engine for more than 5 − 10
seconds at a time.
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−
DIAGNOSTICS ENGINE
DI−53
1996 LAND CRUISER (RM451U)
5 Check mass air flow meter and engine coolant temp. sensor
(See page SF−40 , SF−61 ).
NG Repair or replace.
OK
6 Check for spark and ignition (See page IG−1).
NG Repair or replace.
OK
Check and replace ECM (See page IN−28 ).
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A00164P03792
P22893
DI−56
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check spark plug and spark of misfiring cylinder.
PREPARATION:
(a) Remove No.2 and No.3 cylinder head cover.
(b) Disconnect the high −tension cord from spark plug.
(c) Remove spark plug.
CHECK:
(a) Check the carbon deposits on electrode.
(b) Check electrode gap.
OK:
(1) No large carbon deposit present.
Not wet with gasoline or oil.
(2) Electrode gap: 0.8 mm (0.031 in.).
PREPARATION:
(a) Install the spark plug to the high −tension cord.
(b) Ground the spark plug.
(c) Disconnect injector connector.
CHECK:
Check if spark occurs while engine is being cranked.
NOTICE:
To prevent excess fuel being injected from the injectors
during this test, don’t crank the engine for more than 5 − 10
seconds at a time.
OK:
Spark jumps across electrode gap.
NG Replace or check ignition system (See page IG−1).
OK
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P22475
BatteryFusible
Link
FL AM2
F7W−R
EA2
W−R
B−R B−R
EA2
B−R
B−W B−W
W−B
Distributor
Ignition
Coil 4
12
EA2
IH1
W−B
8 1
2
Noise
Filter 45
B 3
Igniter Tr2
2
1
IH2 IH2
B−G
B−G
B−Y B−YE4
E4 IGT
IGF Tr15V
ECM
1 3 11
6
IG Switch
1
EC
17 23
14 13
−
DIAGNOSTICS ENGINE
DI−97
1996 LAND CRUISER (RM451U)
DTC P1300 Igniter Circuit Malfunction
CIRCUIT DESCRIPTION
The ECM determines the ignition timing, turns on Tr1 at a predetermined angle ( °CA) before the desired
ignition timing and outputs and ignition signal (IGT) ”1” to the\
igniter.
Since the width of the IGT signal is constant, the dwell angle control circuit in \
the igniter determines the time
the control circuit starts primary current flow to the ignition coil based \
on the engine rpm and ignition timing
one revolution ago, that is, the time the Tr2 turns on.
When it reaches the ignition timing, the ECM turns Tr1 off and outputs the IGT signal ”O”.
This turns Tr2 off, interrupting the primary current flow and generating a high voltage i\
n the secondary coil
which causes the spark plug to spark. Also, by the counter electromotive forc\
e generated when the primary
current is interrupted, the igniter sends an ignition confirmation signal (IGF)\
to the ECM. The ECM stops fuel
injection as a fail safe function when the IGF signal is not input to the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P1300No IGF signal to ECM for 6 consecutive IGT signals during
engine running Open or short in IGF or IGT circuit from igniter to ECM
 Igniter
 ECM
WIRING DIAGRAM
DI5PQ−02
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A00183
ON(+)
(−)IGF
BE6653
P24673
DI−98
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check for spark (See page IG−1).
NG Go to step 4.
OK
2 Check for open and short in harness and connector in IGF signal circuit \
between ECM and igniter (See page IN−28).
NG Repair or replace harness or connector.
OK
3 Disconnect igniter connector and check voltage between terminal IGF of E\
CM connector and body ground.
PREPARATION:
(a) Disconnect igniter connector.
(b) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
(c) Turn ignition switch ON.
CHECK:
Measure voltage between terminal IGF of ECM connector and
body ground.
OK:
Voltage: 4.5 − 5.5 V
OK Replace igniter.
NG
Check and replace ECM (See page IN−28 ).
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EM0KR−04
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ENGINE MECHANICAL COMPRESSION
EM−3
506
Author: Date:
1996 LAND CRUISER (RM451U)
COMPRESSION
INSPECTION
HINT:
If there is lack of power, excessive oil consumption or poor fuel
economy, measure the compression pressure.
1. WARM UP AND STOP ENGINE
Allow the engine to warm up to normal operating temperature.
2. DISCONNECT DISTRIBUTOR CONNECTOR
3. REMOVE SPARK PLUGS (See page IG−1 )
4. CHECK CYLINDER COMPRESSION PRESSURE
(a) Insert a compression gauge into the spark plug hole.
(b) Fully open the throttle.
(c) While cranking the engine, measure the compression pressure.
HINT:
Always use a fully charged battery to obtain engine speed of
250 rpm or more.
(d) Repeat steps (a) through (c) for each cylinder.
NOTICE:
This measurement must be done in as short a time as pos-
sible. Compression pressure:
1,176 kPa (12.0 kgf/cm
2, 171 psi) or more
Minimum pressure: 883 kPa (9.0 kgf/cm
2, 128 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm
2, 14 psi) or less
If the cylinder compression in one or more cylinders is low, pour
a small amount of engine oil into the cylinder through the spark
plug hole and repeat steps (a) through (c) for cylinders with low
compression.
If adding oil helps the compression, it is likely that
the piston rings and/or cylinder bore are worn or
damaged.
If pressure stays low, a valve may be sticking or
seating is improper, or there may be leakage past
the gasket.
5. REINSTALL SPARK PLUGS (See page IG−1 )
6. RECONNECT DISTRIBUTOR CONNECTOR
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EM1Q4−01
P05120A16078
1 Dot Mark
EM−4
−
ENGINE MECHANICAL VALVE CLEARANCE
507
Author: Date:
1996 LAND CRUISER (RM451U)
VALVE CLEARANCE
INSPECTION
HINT:
Inspect and adjust the valve clearance when the engine is cold.
1. DRAIN ENGINE COOLANT
2. REMOVE THROTTLE BODY (See page SF−45)
3. DISCONNECT ENGINE WIRE AND HEATER VALVE FROM COWL PANEL
(a) Remove the 2 bolts and disc onnect the ground strap and
engine wire.
(b) Remove the 2 bolts and disconnect the heater valve.
4. DISCONNECT HIGH −TENSION CORDS FROM SPARK
PLUGS (See page IG−1 )
5. REMOVE CYLINDER HEAD COVER
Remove the 13 bolts, cylinder head cover and gasket.
6. SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley, and align its groove with the timing mark ”0” of the timing chain cover.
(b) Check that the timing marks (1 and 2 dots) of the camshaft
drive and driven gears are in straight line on the cylinder
head surface as shown in the illustration.If not, turn the
crankshaft 1 revolution (360 °) and align the marks as
above.
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−
ENGINE MECHANICAL VALVE CLEARANCE
EM−5
508
Author: Date:
1996 LAND CRUISER (RM451U)
7. INSPECT VALVE CLEARANCE
(a) Check only the valves indicated.
Using a thickness gauge, measure the clearance
between the valve lifter and camshaft.
Record the out−of−specification valve clearance
measurements. They will be used later to determine
the required replacement adjusting shim.
Valve clearance (Cold):
Intake0.15 − 0.25 mm (0.006 − 0.010 in.)
Exhaust0.25 − 0.35 mm (0.010 − 0.041 in.)
(b) Turn the crankshaft pulley 1 revolution (360 °) and align
the its groove with timing mark ”0” of the timing chain cov-
er.
(c) Check only the valves indicated as shown. Measure the valve clearance (See procedure in step (a) above).
8. Except for rear valves of No. 6 cylinder ADJUST VALVE CLEARANCE
(a) Remove the adjusting shim.
Turn the crankshaft to position the cam lobe of the
camshaft on the adjusting valve upward.
Position the notch of the valve lifter toward the spark
plug side.
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