1996 TOYOTA LAND CRUISER BAT

BE6653
R14207 F00034
ON
IG1GNDGND
(+)
(−)
BE6653
R14208 F00035
LOCK
GND
GND
DI−216
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check battery positive voltage.
OK:
Voltage: 10 − 14 V
NG Check and repair charging system.
OK
2 Check voltage between terminals IG1 and GND of ABS ECU connector.
PREPARATION:
Remove the ABS ECU with connectors still connected.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals IG1 and GND of the ABS ECU connector.
OK:
Voltage: 10 − 14 V
OK Check and replace ABS ECU.
NG
3 Check continuity between terminals GND of ABS ECU connector and body ground.
CHECK:
Measure the resistance between terminal GND of the ABS ECU
connector and body ground.
OK:
Resistance: 1 Ω or less
NG Repair or replace harness or connector.
OK
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W02206
Fuse BlockECU−IG
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−217
1996 LAND CRUISER (RM451U)
4 Check ECU −IG fuse.
PREPARATION:
Remove the ECU−IG fuse from the Fuse block.
CHECK:
Check the continuity of the ECU −IG fuse.
OK:
Continuity
NG Check for short in all harness and components connected to ECU −IG fuse (See attached wiring
diagram).
OK
Check for open in harness and connector be-
tween ABS ECU and battery
(See page
IN−28).
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DI−218
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
DTC 43 Malfunction in Deceleration Sensor
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
43
Either of the following 1 or 2 is detected:
1. After the battery terminal is connected, input from the deceleration sensor does not change at one cycle (0
km/h → more than 30 km/h → 0 km/h) for 16 times con-
tinuously
2. When the brake pedal is not depressed at vehicle speed of 5 km/h or more, forward and backward G (more than
0.4 G) is detected for 30 seconds or more
Deceleration sensor
 Wire harness for deceleration sensor system
INSPECTION PROCEDURE
1 Check deceleration sensor (See page DI−190).
NG Replace deceleration sensor.
OK
2 Check for open or short in harness and connector between sensor and ECU \
(See page IN−28 ).
NG Repair or replace harness and connector.
OK
Check and replace ABS ECU.
DI5M6−02
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W02197
Ignition
Switch
Battery
AM1
F61
B−L 2 2
3
4
W
2 12
AM1R/B No. 2
2
BB
EA2
6
B−Y
42
GAUGEY A
A
J1
Junction
Connector
CENTER DIFF. LOCK
Indicator Light Y
C10
P−B
P−B
P−B
C11
5
A1319
EXI
CENTER
DIFF. LOCK
DETECTION
Switch ABS ECU
2
1
3
R/B No. 2
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−221
1996 LAND CRUISER (RM451U)
DTC 48 Center Differential Lock Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
48Open or short circuit in center differential lock circuit
Center differential is lockingCenter differential lock
 Center differential lock circuit
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check the center differential is free (Transfer is in H position).
NG Repair the center differential lock system.
OK
DI5M9−02
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DI−222
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
2 Is DTC output?
Check DTC on page DI−190 .
NO Normal.
YES
3 Check that CENTER DIFF. LOCK indicator light does not go off.
NO Go to step 6.
YES
4 Check that bulb for CENTER DIFF. LOCK indicator light is not burnt out.
YES Replace indicator light.
NO
5 Check for open in harness and connector between battery and CENTER DIFF. LOCK indicator light, and CENTER DIFF. LOCK indicator light and ABS ECU (See
page IN−28 ).
NG Repair or replace harness or connector.
OK
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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
DI−224
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
DTC 51 ABS Pump Motor Lock
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
51Pump motor is not operating normally during initial checkABS pump motor
Fail safe function:
If trouble occurs in the ABS pump motor, the ECU cuts off current to the ABS control (solenoid) relay and
prohibits ABS control.
WIRING DIAGRAM
DI5MB−02
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W02195
ECU−IG
Ignition Switch
GNDABS ECU
B−W
J6
Junction
Connector
W
B−L
6
EA2
AM1
IE
3 4
Deceleration
Sensor
2
2
2
2 2
2
2
A13
A13 A13
Battery
AM1
GND
B−W
B−Y
B
B
BB
B
BR BR
BR
F6 1
1
13
+B
12
15
4 R/B No. 2
R/B No. 2
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−225
1996 LAND CRUISER (RM451U)
DTC Always ON Malfunction in ECU
IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the CPU, and the actuator.
DTC No.DTC Detecting ConditionTrouble Area
Alway ONVoltage of ECU terminal +B remains at more than 17 V or
below 9.5 V
Battery
 IC regulator
 Open or short in power source circuit
 ECU
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS control (solenoid) relay and
prohibits ABS control.
WIRING DIAGRAM
DI5ME−03
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DI−226
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Is DTC output?
Check DTC on page DI−190 .
YES Repair circuit indicated by code output.
NO
2 Is normal code displayed?
YES Check ABS solenoid relay. Check for short in harness and connector between ABS solenoid
relay and DLC1 (See page IN−28 ).
NO
3 Is ABS warning light go off?
YES Check for open or short in harness and connec-
tor between ECU−IG fuse and ECU (See page
IN−28 ).
NO
4 Check battery positive voltage.
PREPARATION:
Start the engine.
CHECK:
Check the battery positive voltage.
OK:
Voltage: 10 − 16 V NG Check and repair charging system.
OK
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Version 1.11 - 03/16/2010