1996 TOYOTA LAND CRUISER injector

A00165
ON
#10 #20 #40 #50
#30 #60
BE6653
P24661
−
DIAGNOSTICS ENGINE
DI−57
1996 LAND CRUISER (RM451U)
2 Check voltage of ECM terminal for injector of failed cylinder.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between applicable terminal of ECM connec-
tor and body ground.
OK:
Voltage: 9 − 14 V
OK Go to step 4.
NG
3 Check injector of misfiring cylinder (See page SF−29).
NG Replace injector.
OK
Check for open and short in harness and con-
nector between injector and ECM (See page
IN−28 ).
4 Check fuel pressure (See page SF−6 ).
NG Check and repair fuel pump, pressure regulator,
fuel pipe line and filter (See page SF−1).
OK
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DI−58
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
5 Check injector injection (See page SF−29).
NG Replace injector.
OK
6 Check EGR system (See page EC−11 ).
NG Repair EGR system.
OK
7 Check mass air flow meter and engine coolant temp. sensor (See page SF−40 ,
SF−61 ).
NG Repair or replace.
OK
Check engine mechanical systems compression pressure (See page EM−3), valve clearance
(See page EM−4) and valve timing (See page EM−13).
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EM−2
−
ENGINE MECHANICAL CO/HC
505
Author: Date:
1996 LAND CRUISER (RM451U)
6. TROUBLESHOOTING
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
See the table below for possible causes, and then inspect and
correct the applicable causes if necessary.
COHCProblemsCauses
NormalHighRough idle
3. Faulty ignitions:
Incorrect timing
 Fouled, shorted or improperly gapped plugs
 Open or crossed high −tension cords
 Cracked distributor cap
4. Incorrect valve clearance
5. Leaky EGR valve
6. Leaky intake and exhaust valves
7. Leaky cylinders
LowHighRough idle
(Fluctuating HC reading)
1. Vacuum leaks:
 PCV hose
 EGR valve
 Intake manifold
 Air intake chamber
 Throttle body
 IAC valve
 Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)
1. Restricted air filter
2. Faulty SFI systems:
 Faulty pressure regulator
 Clogged fuel return line
 Defective ECT sensor
 Faulty ECM
 Faulty injector
 Faulty throttle position sensor
 Faulty MAF meter
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EM−30
−
ENGINE MECHANICAL CYLINDER HEAD
1996 LAND CRUISER (RM451U)
(b) Disconnect the connectors.
(1) Disconnect the knock sensor connector.
(2) Disconnect the oil level sensor connector.
(3) Disconnect the 2 connectors from the transmission.
(4) Disconnect the starter connector.
(c) Disconnect the 2 heated oxygen sensor connectors.
(d) Disconnect the PNP switch connector.
(e) Remove the 2 bolts and disconnect the engine wire from the intake manifold and cylinder block.
(f) Disconnect the PCV hose from the PCV valve.
(g) Remove the bolt holding the engine wire to the intake manifold.
(h) Disconnect the connectors. (1) Disconnect the connector for the emission controlvalve set assembly.
(2) Disconnect the 3 injector connectors.
(i) Disconnect the engine wire clamp.
(j) Disconnect the engine wire clamp.
(k) Disconnect the connectors.
(1) Disconnect the 3 injector connectors.
(2) Disconnect the EGR gas temp. sensor connector.
(l) Disconnect the clamp of the No. 6 injector wire from the bracket.
(m) Disconnect the engine wire from the cylinder head and in-
take manifold.
25. DISCONNECT NO. 2 WATER BYPASS PIPE
Remove the 3 bolts, and disconnect the bypass pipe from the
cylinder head.
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−
ENGINE MECHANICAL CYLINDER HEAD
EM−61
1996 LAND CRUISER (RM451U)
14. INSTALL HEATER PIPE
Install a new gasket, the heater pipe and ground cable with the
2 bolts and 2 nuts.
Torque:
20 N·m (200 kgf·cm, 14 ft·lbf) for bolt:
21 N·m (210 kgf·cm, 15 ft·lbf) for nut
15. INSTALL NO. 1 AND NO. 2 EXHAUST MANIFOLDS
(a) Install 2 new gaskets, No. 1 exhaust manifold and No. 2
exhaust manifold with the 13 nuts.
Torque: 39 N·m (400 kgf·cm, 29 ft·lbf)
(b) Install the No. 1 heat insulator and No. 2 heat insulator with the 6 bolts.
Torque: 19 N·m (195 kgf·cm, 14 ft·lbf)
16. INSTALL FRONT EXHAUST PIPE
(a) Install 2 new gaskets and the front exhaust pipe with the 4 nuts.
Torque: 63 N·m (630 kgf·cm, 46 ft·lbf)
(b) Install the No. 1 support bracket with the 2 bolts. Torque: 24 N·m (240 kgf·cm, 17 ft·lbf)
(c) Connect the clamp and tighten the clamp bolt.
Torque: 19.5 N·m (195 kgf·cm, 14 ft·lbf)
(d) Connect the front exhaust pipe to the rear TWC with a new gasket, 2 bolts and 2 nuts.
Torque: 46 N·m (470 kgf·cm, 34 ft·lbf)
17. CONNECT NO. 2 WATER BYPASS PIPE
Connect the bypass pipe to the cylinder head with the 3 bolts.
Torque: 20 N·m (200 kgf·cm, 14 ft·lbf)
18. CONNECT ENGINE WIRE
(a) Place the engine wire on the intake manifold.
(b) Connect the connectors. (1) Connect the 3 injector connectors.
(2) Connect the EGR gas temp. sensor connector.
(c) Connect the clamp of the No.6 injector wire to the bracket.
(d) Connect the engine wire clamp.
(e) Connect the engine wire clamp.
(f) Connect the connectors. (1) Connect the connector for the emission control
valve set assembly.
(2) Connect the 3 injector connectors.
(g) Install the bolt holding the engine wire to the intake man- ifold.
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IG0IB−02
SPARK TEST
TRY ANOTHER IGNITERNO
OK
OK
OK
OK
OK
BAD
BAD
BAD
BAD
BAD
BADConnect securely.
Replace the cord(s).
Replace the distributor housing assembly.
Check wiring between ECM, ignition coil and
igniter, and then try another ECM.
CHECK CONNECTION OF IGNITION COIL, IGNITER AND
DISTRIBUTOR CONNECTOR
CHECK RESISTANCE OF HIGH−
TENSION CORD
(See step 8)
Maximum resistance: 25 k Ω per cord
CHECK RESISTANCE OF IGNITION COIL (See step 24)
Resistance: Cold Hot
Primary 0.36 − 0.55 Ω 0.45 − 0.65 Ω
Secondary 9.0 − 15.4 kΩ 11.4 − 18.1 kΩ
CHECK AIR GAP OF DISTRIBUTOR (See step 31)
Air gap: 0.2 − 0.4 mm (0.008 −0.016 in.)
OK
CHECK RESISTANCE OF SIGNAL GENERATOR
(PICKUP COIL) (See step 32)
Resistance: Cold Hot
G1 and G− 185 − 275 Ω 240 − 325 Ω
G2 and G− 185 − 275 Ω 240 − 325 Ω
NE and G − 185 − 275 Ω 240 − 325 Ω
CHECK IGT SIGNAL FROM ECM
(See page DI−93 ) Check
wiring between ignition switch to ignition
coil and igniter.
Replace the ignition coil.
Replace the distributor housing assembly.
BAD
OK
CHECK
POWER SUPPLY TO IGNITION COIL AND IGNITER
1. Turn ignition switch to ON.
2. Check that there is battery voltage at ignition coil positive (+)
terminal.
−
IGNITION IGNITION SYSTEM
IG−1
735
Author: Date:
1996 LAND CRUISER (RM451U)
IGNITION SYSTEM
ON−VEHICLE INSPECTION
1. CHECK THAT SPARK OCCURS
(a) Disconnect the high −tension cords (from the ignition coil)
from the distributor cap.
(b) Hold the end approx. 12.5 mm (0.50 in.) from the body ground.
(c) Check if spark occurs while engine is being cranked.
HINT:
To prevent gasoline from being injected from injectors during
this test, crank the engine for no more than 1 − 2 seconds at a
time.
If the spark does not occur, do the test as follows:
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PP30A−01
−
PREPARATION SFI
PP−13
1996 LAND CRUISER (RM451U)
EQUIPMENT
Carburetor cleanerThrottle body
Graduated cylinderInjector
OBD II scan toolEngine speed
Soft brushThrottle body
Sound scopeInjector
Torque wrench
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P03244Press Down
Lock
P03245Lock Insert
FI2553
SST
SF−2
−
SFI SFI SYSTEM
630
Author: Date:
1996 LAND CRUISER (RM451U)
HINT:
Always check the diagnostic trouble code before disconnecting
the negative ( −) terminal cable from the battery.
(b) When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative ( −) cables.
(c) Do not permit parts to receive a severe impact during re- moval or installation. Handle all SFI parts carefully, espe-
cially the ECM.
(d) Do not be careless during troubleshooting as there are numerous transistor circuits and even slight terminal con-
tact can further troubles.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting on the SFI parts
and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care is required when pulling out and inserting wiring con-
nectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) When inspecting a connector with a volt/ohmmeter (1) Carefully take out the water −proofing rubber if it is
a water−proof type connector.
(2) Insert the test probe into the connector from the wir-
ing side when checking the continuity, amperage or
voltage.
(3) Do not apply unnecessary force to the terminal.
(4) After checking, install the water−proofing rubber on
the connector securely.
(j) Use SST for inspection or test of the injector or its wiring connector.
SST 09842−30070
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