1996 TOYOTA LAND CRUISER relay

DI−124
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
9 Check fuel pump resistor (See page SF−58 ).
NG Replace fuel pump resistor.
OK
Check for open and short in harness and connector between fuel pump relay and fuel\
pump resis-
tor and fuel pump (See page IN−28).
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P22216
Pressure RegulatorVSV
ECM
To Fuel Tank
(Return)
From Delivery Pipe Intake
Manifold
P22482
BRFrom BatteryR/B No.2EB
2
2
2
2
EFI Main
22Y−R
Y−R
EB11
REA27R
R−Y
EZ1
VSV for Fuel21
EZ1
Relay
EFI
12 4
3
1B B3
L−R
Pressure Control E7
E4 3
21 FPU
MRLY
ECM
B+
E01
−
DIAGNOSTICS ENGINE
DI−125
1996 LAND CRUISER (RM451U)
Fuel Pressure Control Circuit
CIRCUIT DESCRIPTION
The ECM turns on a VSV (V acuum Switching Valve) to draw the
air into the diaphragm chamber of the pressure regulator if it de-
tects that the temperature of the engine coolant is too high dur-
ing engine starting.
The air drawn into the chamber increases the fuel pressure to
prevent fuel vapor lock at high engine temperature in order to
help the engine start when it is warm.
Fuel pressure control ends approx. 120 sec. after the engine is
started.
WIRING DIAGRAM
DI5PZ−02
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A00198
ONFPU
(+)
(−)
BE6653
P24688
−
DIAGNOSTICS ENGINE
DI−127
1996 LAND CRUISER (RM451U)
3 Check for open and short in harness and connector between EFI main relay
(Marking: EFI) and ECM (See page IN−28).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−28 ).
OBD II scan tool (excluding TOYOTA hand −held tester)
1 Check VSV for fuel pressure control (See page SF−59 ).
NG Replace VSV for fuel pressure control.
OK
2 Check voltage between terminal FPU of ECM connector and body ground.
PREPARATION:
(a) Remove instrument panel speaker No.1 panel (See page
SF−65 ).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal FPU of ECM connector and
body ground.
OK:
Voltage: 9 − 14 V
NG Check for open and short in harness and con- nector between EFI main relay (Marking: EFI)
and ECM (See page IN−28 ).
OK
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DI−150
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
Chapter 2: On−Vehicle Repair
(  : A340F, A343F Automatic Transmission Repair Manual Pub. No. RM479U)
SymptomSuspect AreaSee page
Vehicle does not move in any forward position and reverse posi-
tion
1. Throttle cable
2. Transmission control rod
3. Manual valve
4. Primary regulator valve
5. Parking lock pawl
6. Off−vehicle repair matrix chartDI−131
DI−131


−
Vehicle does not move in R position1. Off −vehicle repair matrix chart−
Vehicle does not move in a particular position or positions
(Except R position)1. Off −vehicle repair matrix chart−
No up− shift (1st → 2nd)1. 1 −2 shift valve
2. Off −vehicle repair matrix chart
−
No up −shift (2nd → 3rd)1. 2−3 shift valve
2. Off −vehicle repair matrix chart
−
No up− shift (3rd → O/D)1. 3−4 shift valve
2. Off −vehicle repair matrix chart
−
No down− shift (O/D → 3rd)1. 3−4 shift valve
No down −shift (3rd → 2nd)1. 2−3 shift valve
No down −shift (2nd → 1st)1. 1−2 shift valve
2. Off −vehicle repair matrix chart
−
Lock− up does not engage or lock −up does not disengage1. Lock− up relay valve
2. Off −vehicle repair matrix chart
−
Harsh engagement (N → D)1. Accumulator control valve
2. Off −vehicle repair matrix chart
−
Harsh engagement (Lock −up)1. Lock− up control valve
2. Off −vehicle repair matrix chart
−
Harsh engagement (N → R)
1. Accumulator control valve
2. C
2 accumulator
3. Off −vehicle repair matrix chart


−
Harsh engagement (N → L)1. Low coast modulator valve
Harsh engagement (1st → 2nd (D position))1. Accumulator control valve
2. B
2 accumulator


Harsh engagement (1st
→ 2nd (2 position))1. Accumulator control valve
2. B
2 accumulator


Harsh engagement (2nd
→ 3rd → O/D)1. Cut− back valve
Harsh engagement (1st → 2nd → 3rd → O/D)1. Throttle valve
2. Accumulator control valve

Harsh engagement (2nd → 3rd)
3. Accumulator control valve
1. C
2 accumulator
2. Off −vehicle repair matrix chart


−
Harsh engagement (3rd → O/D)
1. Accumulator control valve
2. B
0 accumulator
3. Off −vehicle repair matrix chart


−
Harsh engagement (O/D → 3rd)
1. Accumulator control valve
2. C
0 accumulator
3. Off −vehicle repair matrix chart


−
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Q07464
Solenoid Valve SLTransmission
ECM
B+
R−L
3
EC2
Y 8
E4 SL
R−L
3
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−163
1996 LAND CRUISER (RM451U)
DTC P0773 Shift Solenoid E Electrical Malfunction
(Shift Solenoid Valve SL)
CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hyd\
raulic pressure
acting on the lock−up relay valve, which then controls operation of the lock −up clutch.
Fail Safe Function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL O\
FF.
DTC No.DTC Detecting ConditionTrouble Area
P0773Open or short in shift solenoid valve SL circuit for 1 time
(2 trip detection logic) Open or short in shift solenoid valve SL circuit
 Shift solenoid valve SL
 ECM
WIRING DIAGRAM
DI5KS−02
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DI5LW−03
DI−196
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch OFF.
HINT:
Using SST 09843 −18020, connect the terminals Tc and E1, and remove the short pin.
If any abnormality is not found when inspection parts, inspect the ECU.
If a malfunction code is displayed during the DTC check, check the circu\
it listed that the code. For details
of each code, turn to the page referred to under the ”See page” for respective ”DTC N\
o.” in the DTC chart.
DTC No.
(See page)Detection Item Trouble Area
11
( DI−201 )Open circuit in ABS control (solenoid) relay circuitABS control (solenoid) relay
 Open or short in ABS control (solenoid) relay circuit
12
( DI−201 )Short circuit in ABS control (solenoid) relay circuitABS control (solenoid) relay
 B+ short in ABS control (solenoid) relay circuit
13
( DI−204 )Open circuit in ABS control (motor) relay circuitABS control (motor) relay
 Open or short in ABS control (motor) relay circuit
14
( DI−204 )Short circuit in ABS control (motor) relay circuitABS control (motor) relay
 B+ short in ABS control (motor) relay circuit
21
( DI−207 )Open or short circuit in 3 −position solenoid circuit for right front
wheel ABS actuator
 Open or short in SFR circuit
22
( DI−207 )Open or short circuit in 3− position solenoid circuit for left front
wheel ABS actuator
 Open or short in SFLcircuit
23
( DI−207 )Open or short circuit in 3− position solenoid circuit for rear
wheel ABS actuator
 Open or short in SRR circuit
31
( DI−210 )Right front wheel speed sensor signal malfunction
Right front, left front, right rear and left rear speed sensor
 Open or short in each speed sensor circuit
 Senser rotor32
( DI−210 )Left front wheel speed sensor signal malfunction
33
( DI−210 )Right rear wheel speed sensor signal malfunction
34
( DI−210 )Left rear wheel speed sensor signal malfunction
35
( DI−210 )Open circuit in left front or right rear speed sensor circuitOpen in left front or right rear speed sensor circuit
36
( DI−210 )Open circuit in right front or left rear speed sensor circuitOpen in right front or left rear speed sensor circuit
41
( DI−215 )Low battery positive voltage or abnormally high battery
positive voltageBattery
 IC regulator
 Open or short in power source circuit
43
( DI−218 )Malfunction in deceleration sensorDeceleration sensor
 Wire harness for deceleration sensor circuit
44
( DI−219 )Open or short in deceleration sensor circuitDeceleration sensor
 Open or short in deceleration sensor circuit
48
( DI−221 )Open or short circuit in center differential lock circuit
Center differential is lockingCenter differential lock
 Center differential lock circuit
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DI5LX−02
W03004
Rear Speed Sensor
Rear Speed Sensor Rotor
Front Speed Sensor
Stop Light Switch
ABS Warning Light
Deceleration Sensor
DLC1
ABS ECU
ABS Actuator
ABS Relay
Front Speed Sensor Rotor
DI−198
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
PARTS LOCATION
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DI5M0−02
W02192
22 1
4
ABS
R/B
No. 2
W
B−R
W−B
ID
1 1
1
2
2
2
3
64
4 3
6
3
511
18
G
G−B
G−Y
DLC1 ABS ECU
MR
R−
SR
AST MT
L−Y
L−W
ABS Actuator ABS Control Relay
Motor
Relay
Solenoid
Relay
ABS ECU
A6A4
A13A5
F6
Battery
B−L
2
2
12 B−W
B−W
B−W
EA312
5
A5
A4
A4 A6
A6
A6
A7
A7
A7 A7A13 A13
A13 A13
24
23
B−L
EA312 V 12 V
B−W
AM1
W−B W−B
R/B
No. 2 B−W
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−201
1996 LAND CRUISER (RM451U)
CIRCUIT INSPECTION
DTC 11, 12 ABS Control (Solenoid) Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is\
turned ON, if the initial check is
OK, the relay goes on.
DTC No.DTC Detecting ConditionTrouble Area
11
Conditions (1) and (2) continue for 0.2 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage: Battery positive voltage
2. (2) ABS control (solenoid) relay monitor terminal (AST) voltage: 0 V
ABS control (solenoid) relay
 Open or short in ABS control (solenoid) relay circuit
12
Conditions 1 and 2 continue for 0.2 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
0 V
2. ABS control (solenoid) relay monitor terminal (AST) volt- age: Battery positive voltage
ABS control (solenoid) relay
 B+ short in ABS control (solenoid) relay circuit
Fail safe function:
If trouble in the ABS control (solenoid) relay circuit, the ECU cuts off current to the ABS control (solenoid)
relay and prohibits ABS control.
WIRING DIAGRAM
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