warning light TOYOTA LAND CRUISER 1996 J80 Owner's Manual

W02196
BF
6
ECU−IG Y
Junction
Connector ABS ECU
W−B Y−B
4
2 3
1
Deceleration
Sensor
A12
ABS ECU
GS1
GS2 GST
A22
3
B−W
Y
B−W
B−W
A22A22 A22
A22
A12
A12
12
10
12 13 14
15
Y−RY−R
Y−B
B
B
B 12 V
12 V
ID3
ID3
ID3
ID2
3
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−219
1996 LAND CRUISER (RM451U)
DTC 44 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects deceleration on the vehicle. The sensor signal is used in ABS control. If the sensor func-
tions abnormally, the ABS warning light comes on but the ABS still operates.
DTC No.DTC Detecting ConditionTrouble Area
44
Either of the following 1 or 2 is detected:
1. An open or short is detected in circuit GS1 or GS2 for
1sec.
2. After the ignition is turned ON, the test signal is output by GST
During this time, a trouble signal is detected for 0.5 sec.
Deceleration sensor
 Open or short in deceleration sensor circuit
WIRING DIAGRAM
DI5M8−02
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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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−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−227
1996 LAND CRUISER (RM451U)
5 Check ABS warning light.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the ABS ECU.
(c) Turn the ignition switch ON.
CHECK:
Check the ABS warning light goes off.
OK Check and replace ABS ECU.
NG
Check for short in harness and connector between combination meter and ABS EC\
U, and com-
bination meter and DLC1 (See page IN−28).
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W02199
BatteryJunction
Connector
ID
W−B
B−W
ABS Control Relay
1 4
2
6 3
1
4
Motor
Relay
Solenoid
Relay
ABS ECU
ABS ECU
ABS Actuator 4
5
A7
A6
A6 A6
A4 R−L
R−L
DLC1
Short Pin
B−W
IH1
A12
ABS ECU
W
13
C10
GAUGE
2223 ABS
Warning
Light
A
A
J1
C10IH1
20
A7
A7A7
A7
EA3
EA3
2
1 B−W
B−W
B−L OO
O
Y
54
3
23 OY
DI−230
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory. After removing the short pin of the DLC1, connect terminals
Tc and E
1 of the DLC1 to make the ABS warning light blink and output the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
Troubleshooting in accordance with the chart below for each trouble symptom.
ABS warning light does not light upGo to step 1
ABS warning light remains onGo to step 3
1 Check ABS warning light.
See Combination Meter Troubleshooting on page BE−2.
NG Repair bulb or combination meter assembly.
OK
DI5MJ−03
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DI−232
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
3 Is DTC output?
Check DTC on page DI−190 .
YES Repair circuit indicated by code output.
NO
4 Does ABS warning light go off if short pin is removed?
NO Check for short in harness and connector be- tween warning light and DLC1 and ECU (See
page IN−28 ).
YES
5 Check ABS control relay (See step 2).
NG Replace ABS control relay.
OK
Check for short in harness and connector be-
tween DLC1 and ABS control relay (See page
IN−28 ).
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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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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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DI5Q0−02
Vehicle Brought to Workshop
Customer Problem Analysis
Warning Light Check
DTC Check and Recording
DTC ChartDI−243
Circuit Inspection
Remains on
Symptom SimulationDTC Check and Recording
Identification of Problem
Malfunction Code Clearance
Confirmation Test
Malfunction Code
END
Normal Code
Normal Code
1
2
3 7
8
Repair
10 6
5
Step
:Diagnostic steps permitting the use
of the TOYOTA hand−held tester.
3, 4, 5, 10, 11, 12
DI−239
DI−240
DI−271
DI−240
DI−240
DI−240
Malfunction Code Clearance4
DI−240
9
DTC Check11
DI−240
12 Does Not Light Up
Normal Code
Normal
Code
Malfunction Code
Malfunction Code
Malfunction Code
IN−18
DI−238
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
405
Author: Date:
1996 LAND CRUISER (RM451U)
SUPPLEMENTAL RESTRAINT SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Perform troubleshoot in accordance with the procedure on the following page.
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DI5Q1−01
Supplemental Restraint System Check Sheet
Date Problem Dist Occurred
Customer ’s Name
Registration No.
Registration Year
Frame No.
Odometer Reading
Weather
Temperature
Vehicle Operation
Road Conditions
Details Of Problem
Vehicle Inspection, Repair Histo-
ry
Prior to Occurrence of Mal-
function(Including Supplemental
Restraint System)
Diagnosis System Inspection
SRS Warning Light
Inspection
DTC Inspection 1st Time
2nd Time
1st Time
2nd Time Inspector ’s
Name
Fine Cloudy Rainy Snowy Other
Approx.
Starting Idling
Driving [ Constant speed Acceleration Deceleration Other ]
Remains ON Sometimes Light Up Does Not Light Up
Remains ON Sometimes Light Up
Does Not Light Up
Normal Code Malfunction Code
Normal Code Malfunction Code [ Code.
]
[ Code. ]
km
Miles
//
// //
Date V
ehicle Brought In
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−239
1996 LAND CRUISER (RM451U)
CUSTOMER PROBLEM ANALYSIS CHECK
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DI5Q2−02
R13451
R13006
E1Tc
AT0716
Normal Code
ON
OFF 0.25
0.25
DI−240
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
PRE−CHECK
1. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch to ACC or ON and check that the
SRS warning light lights up.
(b) Check that the SRS warning light goes out after approx. 6 seconds.
HINT:
When the ignition switch is at ACC or ON and the SRS
warning light remains on or flashes, the airbag sensor as-
sembly has detected a malfunction code.
If, after approx. 6 seconds have elapsed, the SRS warn-
ing light sometimes lights up or the SRS warning light
lights up even when the ignition switch is OFF, a short in
the SRS warning light circuit can be considered likely.
Proceed to ”SRS warning light system malfunction” on
page DI−274 , DI−276 .
2. DTC CHECK (Using diagnosis check wire)
(a) Output the DTC. (1) Turn the ignition switch to ACC or ON position andwait approx. 20 seconds.
(2) Using SST, connect terminals Tc and E1 of the
DLC1.
SST 09843−18020
(b) Read the DTC. Read the 2− digit DTC as indicated by the number of times
the SRS warning light blinks. As an example, the blinking
patterns, normal, 11 and 31 are as shown on the illustra-
tion.
Normal code indication
The light will blink 2 times per second.
Malfunction code indication
The first blinking output indicates the first digit
of a 2−digit DTC. After a 1.5 second pause,
the second blinking output will indicate the
second digit.
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