1996 TOYOTA LAND CRUISER coil

−
DIAGNOSTICS ENGINE
DI−101
1996 LAND CRUISER (RM451U)
9 Check ignition coil (See page IG−1).
NG Replace ignition coil.
OK
Replace igniter.
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S00816
BatteryFusible
Link
F8F7
11
W−R
3EA2
W−R11 6
IG Switch B−R
Fuse BlockIGN B−L
22
22 2
2
EFI Main Relay
1
2
3 4
EFI R
−Y
EC
EB
B−R
1EB1
R
Y−R
Y−REA2IH1
22 7
BR−B E4
E7 E7 E7
IGSW
MRLY
+B
E1 B+
ECM
1
3
12
24FL AM2
FL MAIN
W R
R/B No.2 Y
DI−11 0
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
ECM Power Source Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery positive voltage is applied t\
o the coil, closing the contacts of
the EFI main relay (Marking: EFI) and supplying power to the terminals +B\
of the ECM.
WIRING DIAGRAM
DI5PX−02
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P22480
BatteryStarter
FL MAIN
FL AM2EFI
EFI Main Relay
IG Switch IG
ST
Park/Neutral
Position SwitchCircuit Opening
Relay
Fuel Pump Relay
Fuel Pump
From Crankshaft Position
Sensor Fuel Pump
Resistor
(STA Signal)
(NE Signal) MRLY
FC
STA
NE
Tr1
Tr2
ECM
IGN FPR
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DIAGNOSTICS ENGINE
DI−11 5
1996 LAND CRUISER (RM451U)
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
In the diagram below, when the engine is cranked, current flows form terminal ST of the igni\
tion switch to
terminal STA of ECM (STA signal).
When the STA signal and NE signal are input to the ECM, Tr1 is turned ON, current flows to coil of the circuit
opening relay, the relay switches on, power is supplied to the fuel pump and the fuel\
pump operates.
While the NE signal is generated (engine running), the ECM keeps Tr1 ON (circuit opening relay ON) and
the fuel pump also keeps operating.
The fuel pump speed is controlled at 2 levels (high speed or low speed) b\
y the condition of the engine (start-
ing, light load, heavy load). When the engine starts (STA ON), Tr2 in the ECM is OFF, so battery voltage is
applied directry to the fuel pump. Fuel pump operates at high speed.
After the engine starts, during idling or light loads, since Tr2 goes ON, power is supplied to the fuel pump
via the fuel pump resistor.
Fuel pump operates at low speed.
DI5PY−02
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Q07352 AT5605D00084
Rotor
No. 2 Vehicle Speed Sensor Rotor
No. 2 Vehicle Speed Sensor
AT8761
5 V/div.
0 V
2 msec./div.
DI−166
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
DTC P1700 Speed Sensor No. 2 Circuit Malfunction
(No. 2 Vehicle Speed Sensor)
CIRCUIT DESCRIPTION
The No. 2 vehicle speed sensor detects the rotation speed of the transmissi\
on output shaft and sends sig-
nals to the ECM. The ECM determines the vehicle speed based on these signals\
.
An AC voltage is generated in the No. 2 vehicle speed sensor coil as the r\
otor mounted on the output shaft
rotates, and this voltage is sent to the ECM.
The gear shift point and lock −up timing are controlled by the ECM based on the signals from this vehic\
le
speed sensor and the throttle position sensor signal.
If the No. 2 vehicle speed sensor malfunctions, the ECM uses input signa\
ls from the No. 1 vehicle speed
sensor as a back −up signal.
DTC No.DTC Detecting ConditionTrouble Area
P1700
All conditions below are detected 500 times or more continu-
ously (2 trip detection logic)
(a) No signal from No. 2 vehicle speed sensor is input to ECM while 4 pulses of No. 1 vehicle speed sensor signal is sent
(b) Vehicle speed: 9 km/h (5.6 mph) or more for as least 4 sec.
(c) Park/neutral position switch: OFF (Other than P or N posi-
tion)
(d) Transfer position: Other than N position
 Open or short in No. 2 vehicle speed sensor circuit
 No. 2 vehicle speed sensor
 ECM
Reference:
Waveform between terminals SP2
+ and SP2− when the vehicle
speed is approx. 60 km/h (37 mph).
DI5KW−02
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W02193
2
2 1
3
ABS
Battery
W
B−W
W−BID
1
W−B 1
1
W−B 2
2
3 5
4
6
3
4
DLC1
ABS Actuator ABS Control Relay
Motor
Relay
Solenoid
Relay
ABS ECULG
L−R ABS ECU
ABS ECU
3
4
1
1
13
26
SFR
SFL
SRR
A6
A4 A5
A13
A7A6
A6 A6
A4 A4
A5
A5
A13
A13
F6
EA3
L
B−W
B−W
2
2
2
2
EA31
A7 A7
A7
B−RBL
4
1
B−L
AM1
Monitor
R/B
No. 2
B−W
B−W
R/B
No. 2
F00026
1
3
LOCK
7
4
A5
A4
4
DI−208
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check ABS actuator solenoid.
PREPARATION:
Disconnect the 2 connectors from the ABS actuator.
CHECK:
Check the continuity between terminals A4 − 4 and A5−1, 3, 4
of the ABS actuator connector.
OK:
Continuity
HINT:
Resistance of each solenoid coil is 0.8 − 1.6 Ω
NG Replace ABS actuator.
OK
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BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
-V High Speed
Low Speed
Coil
N
S
-
DIAGNOSTICS ANTI-LOCK BRAKE SYSTEM
DI-210
1996 LAND CRUISER (RM451U)
DTC31, 32, 33, 34, 35, 36 Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
the ABS system. The front and rear rotors each have 48 serra-
tions.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.
DTC No.DTC Detecting ConditionTrouble Area
31, 32, 33, 34
Detection of any of conditions (1) through (3):
(1) At vehicle speed of 10 km/h (6 mph) or more, pulses are
not input for 5 sec.
(2) Momentary interruption of the speed sensor signal oc-
curs at least 7 times in the time between switching the igni-
tion switch ON and switching it OFF.
(3) Abnormal fluctuation of speed sensor signals with the
vehicle speed 20 km/h (12 mph) or more.

Right front, left front, right rear and left rear speed sensor

Open or short in each speed sensor circuit

Sensor rotor
35
Speed sensor signal is not input for about 1 sec. while
the left front and right rear speed sensor signals are being
checked with the IG switch ON.

Open in left front or right rear speed sensor circuit
36
Speed sensor signal is not input for about 1 sec. while
the right front and left rear speed sensor signals are being
checked with the IG switch ON.

Open in right front or left rear speed sensor circuit
HINT:

DTC No. 31 is for the right front speed sensor.

DTC No. 32 is for the left front speed sensor.

DTC No. 33 is for the right rear speed sensor.

DTC No. 34 is for the left rear speed sensor.
Fail safe function:
If trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS control (solenoid) relay and
prohibits ABS control.
DI5M3-02
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EM−70
−
ENGINE MECHANICAL ENGINE UNIT
1996 LAND CRUISER (RM451U)
13. DISCONNECT ENGINE WIRE AND HEATER VALVE
FROM COWL PANEL
(a) Remove the 2 bolts and disconnect the engine wire and
ground strap.
(b) Remove the 2 bolts and disconnect the heater valve.
14. DISCONNECT BRAKE BOOSTER VACUUM HOSE
15. DISCONNECT EVAP HOSE
16. DISCONNECT FUEL HOSES
(a) Disconnect the fuel return hose.
(b) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet hose from the fuel filter.
17. DISCONNECT WIRES AND CONNECTORS
(a) Disconnect the 2 heated oxygen sensor connectors.
(b) Disconnect the DLC1 clamp.
(c) Disconnect the 2 oil pressure gauge connectors.
(d) Disconnect the generator wire and connector.
(e) Disconnect the connector on the intake manifold from the
fender apron.
(f) Disconnect the high−tension cord from the ignition coil.
(g) Disconnect the ground strap from the No. 1 engine hang-
er.
(h) Disconnect the ground strap from the air intake chamber.
(i) Disconnect the starter wire.
(j) Disconnect the ground cable from the cylinder block.
18. DISCONNECT A/C COMPRESSOR AND BRACKET
(a) Loosen the idler pulley nut and adjusting bolt, and remove
the drive belt.
(b) Remove the 4 mounting bolts, and disconnect the com-
pressor from the bracket.
HINT:
Put aside the compressor, and suspend it.
(c) Remove the 5 bolts and A/C compressor bracket.
19. REMOVE RADIATOR PIPE
(a) Remove the 2 nuts holding the radiator pipe to the No. 1 oil pan.
(b) Disconnect the No. 2 radiator hose from the water inlet and remove the radiator pipe.
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EM−80
−
ENGINE MECHANICAL ENGINE UNIT
1996 LAND CRUISER (RM451U)
19. CONNECT ENGINE WIRE TO CABIN
(a) Push in the engine wire through the cowl panel.
(b) Connect the connectors.
(1) Connect the 3 connectors to the ECM.
(2) Connect the 2 connectors to the cowl wire.
(c) Connect the A/C amplifier with the screw.
(d) Install the speaker panel with the screw.
(e) Install the glove compartment door with the 2 screws.
20. CONNECT PS RETURN HOSE
Connect the return hose to the PS reservoir tank.
21. CONNECT PS PRESSURE HOSE
Connect the PS pressure hose with 2 new gaskets and the
union bolt. Torque: 56 N·m (575 kgf·cm, 42 ft·lbf)
22. INSTALL RADIATOR PIPE
(a) Connect the No. 2 radiator hose to the water inlet.
(b) Install the 2 nuts holding the radiator pipe to the No. 1 oil pan.
Torque: 21 N·m (210 kgf·cm, 15 ft·lbf)
23. INSTALL A/C COMPRESSOR AND BRACKET
(a) Install the A/C compressor bracket with the 5 bolts.
Torque: 37 N·m (375 kgf·cm, 27 ft·lbf)
(b) Install the A/C compressor with the 4 bolts. Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)
(c) Install and adjust the drive belt (See page CH−2).
24. CONNECT WIRES AND CONNECTORS
(a) Connect the 2 heated oxygen sensor connectors.
(b) Connect the DLC1 clamp.
(c) Connect the 2 oil pressure gauge connectors.
(d) Connect the generator wire and connector.
(e) Connect the connector on the intake manifold to the fend-
er apron.
(f) Connect the high −tension cord to the ignition coil.
(g) Connect the ground strap to the No. 1 engine hanger.
(h) Connect the ground strap to the air intake chamber.
(i) Connect the starter wire.
(j) Connect the ground cable to the cylinder block.
25. CONNECT FUEL HOSES
(a) Connect the fuel inlet hose to the fuel filter with 2 new gas-
kets and the union bolt.
Torque: 29 N·m (300 kgf·cm, 22 ft·lbf)
(b) Connect the fuel return hose.
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