1996 TOYOTA LAND CRUISER wiring

W02200
BR−BE1Tc
3 11
DLC1
B−YIH1 ABS ECU
Tc 12 VA13
5
EC
B−Y
11
F00007
Tc
DLC1
E1
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−233
1996 LAND CRUISER (RM451U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and E1 of the DLC1 causes the ECU to display the DTC by flashing the ABS warni\
ng
light.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Tc and E
1 of the
DLC1.
OK:
Voltage: 10 − 14 V
OK If ABS warning light does not blink even after Tc and E
1 are connected, ECU may be defective.
NG
DI5ML−02
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Version 1.11 - 03/16/2010

W01184
BR−BGR−R
31 6 15
13
Ts
Ts
DLC1 ABS ECU
12 V
E1IH1 A12
EC
GR−R
F00007
Ts
DLC1
E1
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−235
1996 LAND CRUISER (RM451U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detecte\
d with
the DTC check. Connecting terminals Ts and E
1 of the DLC1 in the engine compartment starts the check.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminals Ts and E
1 of the
DLC1.
OK:
Voltage: 10 − 14 V
OK If ABS warning light does not blink even after Ts and E
1 are connected, ECU may be defective.
NG
DI5MN−02
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DI5Q7−03
R16017
Airbag Sensor Assembly
P Squib
D Squib Spiral
Cable W−R
B−R
WB
1
2 1 2
1
2
3
4 P
+
P−
D+
D−
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−247
1996 LAND CRUISER (RM451U)
CIRCUIT INSPECTION
DTC 11 Short in Squib Circuit (to Ground)
CIRCUIT DESCRIPTION
The squib circuit consists of the airbag sensor assembly, spiral cable, steering wheel pad and front passen-
ger airbag assembly. If causes the SRS to deploy when the SRS deployment conditions are sat\
isfied.
For details of the function of each component, see FUNCTION OF COMPONENT\
S on page RS−2.
DTC 11 is recorded when ground short is detected in the squib circuit.
DTC No.DTC Detection ConditionTrouble Area
11
 Short circuit in squib wire harness (to ground)
 Squib malfunction
 Spiral cable malfunction
 Airbag sensor assembly malfunctionSteering wheel pad (D squib)
 Front passenger airbag assembly (P squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
WIRING DIAGRAM
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AB0119
W01931
R14300
H00010
Airbag Sensor
Assembly
Spiral
Cable
ON
P Squib
D Squib D+
D−
(+)
(−)
DI−254
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
DTC 12 Short in Squib Circuit (to B+)
CIRCUIT DESCRIPTION
The squib circuit consists of the airbag sensor assembly, spiral cable, steering wheel pad and front passen-
ger airbag assembly. It causes the SRS to deploy when the SRS deployment conditions are sat\
isfied.
For details of the function of each component, see page FUNCTION OF COMP\
ONENTS on page RS−2.
DTC 12 is recorded when a B+ short is detected in the squib circuit.
DTC No.DTC Detection ConditionTrouble Area
12
 Short circuit in squib wire harness (to B+)
 Squib malfunction
 Spiral cable malfunction
 Airbag sensor assembly malfunctionSteering wheel pad (D squib)
 Front passenger airbag assembly (P squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
WIRING DIAGRAM
Refer to page DI−247 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Preparation. (See step 1 on page DI−271)
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the voltage between
D
+, D− and body ground.
OK:
Voltage: 0 V
NG Go to step 7.
OK
DI5Q8−03
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R15194
Airbag Sensor
Assembly
Spiral
Cable
D Squib
1
2 3 4
W
B D
+
D−
DI−260
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
DTC 14 Open in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and the steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are\
satisfied.
For details of the function of each component, see FUNCTION OF COMPONENT\
S on page RS−2.
DTC 14 is recorded when an open is detected in the squib circuit.
DTC No.DTC Detection ConditionTrouble Area
14
 Open circuit in D+ wire harness or D− wire harness of
squib
 D squib malfunction
 Spiral cable malfunction
 Center airbag sensor assembly malfunctionSteering wheel pad (D squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Preparation. (See step 1 on page DI−271)
DI5Q9−03
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Version 1.11 - 03/16/2010

R15195
Airbag Sensor
Assembly
1 2 12
B−R
W−R
P
+
P−
P Squib
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−267
1996 LAND CRUISER (RM451U)
DTC 54 Open in P Squib Circuit
CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passen\
ger airbag assembly.
It causes the airbag to deploy when the airbag deployment conditions are\
satisfied.
For details of the function of each component, see FUNCTION OF COMPONENT\
S on page RS−2.
DTC 54 is recorded when an open is detected in the P squib circuit.
DTC No.DTC Detection ConditionTrouble Area
54
 Open circuit in P+ wire harness or P− wire harness of
squib
 Squib malfunction
 Airbag sensor assembly malfunctionFront passenger airbag assembly (P squib)
 Airbag sensor assembly
 Wire harness
WIRING DIAGRAM
DI5QB−03
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Version 1.11 - 03/16/2010

R13678
Airbag Sensor
Assembly
Battery F/B
R/B No.2
2
2
1
1
36 4
6 10
9
S4
GR
B
W
L−R
B−L
B−R ACC
IG2
A
IGN
AM1
AM2
FL BLOCK
W−R
B−L
W−R
Ignition
Switch
B
EA2
EA2
4
11 3
CIG
J3 Junction
Connector
GR 4
33
S5 S5
S4
A
2 2
50A AM1
2
2
Short ConnectorGR
B−W
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−271
1996 LAND CRUISER (RM451U)
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage −increase circuit (DC−DC converter) in the airbag sensor assembly in
case the source voltage drops.
When the battery voltage drops, the voltage −increase circuit (DC−DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is different to other circuits −when the SRS warning
light remains lit up and the DTC is a normal code, source voltage drop is ind\
icated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and the source voltage returns to
normal, the SRS warning light automatically goes off.
DTC No.DTC Detection ConditionTrouble Area
NormalSource voltage dorp Battery
 Airbag sensor assembly
WIRING DIAGRAM
DI5QC−03
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R13679
BatteryFL BLOCK 2
MAIN
W
W
ECU−B
1
F/B
S7
B−R
2
3
SRS Warning
Light
8LA
Tc
B−Y8
IH1 Airbag Sensor
Assembly
DLC1
5 W−L
11
GENERATOR
(ALTERNATOR)
W
Cruise Control ECU
W−L
W−L
B−Y
B−Y
IH1 S7 S6
S6
Short Connector
Short Connector W−L
B−L
11
12
3
EA3 11
22
7
DI−274
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
SRS Warning Light System Malfunction (Always lit up, when igni-
tion switch is in LOCK position.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the \
ignition switch is
turned from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to\
inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by the blinking\
of the SRS warn-
ing light.
WIRING DIAGRAM
DI5QD−03
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Version 1.11 - 03/16/2010