Terminal TOYOTA LAND CRUISER 1996 J80 Workshop Manual

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
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

BE6653
R14209
F15325
(−) (+)STP
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−229
1996 LAND CRUISER (RM451U)
2 Check voltage between terminal STP of ABS ECU and body ground.
PREPARATION:
Remove the ABS ECU with connectors still connected.
CHECK:
Measure the voltage between terminal STP of the ABS ECU
and body ground when the brake pedal is depressed.
OK:
Voltage: 8 − 14 V
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−200 ).
NG
3 Check for open in harness and connector between ABS ECU and stop light switch (See page IN−28 ).
NG Repair or replace harness or connector.
OK
Check and replace ABS ECU.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

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
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

R14139
A6A7
Continuity
Continuity Open
1
2
5
6
3
R14140
A7
A6
(−)
(+)
Continuity
Open
1
2
5
6
3
R14144
(+) (−)4
5
A7A6
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−231
1996 LAND CRUISER (RM451U)
2 Check ABS control relay.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connectors from the control relay.
CHECK:
Check the continuity between each terminal of the ABS control
relay.
OK:
Terminals A7 −1 and A6− 3Continuity
(Reference value 80 Ω)
Terminals A7 −5 and A7− 6Continuity
Terminals A7 −2 and A7− 5Open
CHECK:
(a) Apply battery positive voltage between terminals A7 −1
and A6−3.
(b) Check the continuity between each terminal of the ABS control relay.
OK:
Terminals A7 −5 and A7− 6Open
Terminals A7 −2 and A7− 5Continuity
CHECK:
Connect the  test lead to terminal A7−4 and the  test lead
to terminal A7−5. Check continuity between the terminals.
OK:
Continuity
If there is no continuity, connect the  test lead to terminal A7−4
and the  lead to terminal A7 −5. Recheck continuity between
terminals.
NG Replace ABS control relay.
OK
Check for open in harness and connector be-
tween DLC1 and ABS control relay and body
ground (See page IN−28 ).
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

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
Brought to you by BirfMark
Brought to you by BirfMark
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
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

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.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AB0056
Code 11 and 31ON
OFF
0.5 2.5 4.0
1.5 0.5
Code 11 Code 31 Repeat
R13819
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−241
1996 LAND CRUISER (RM451U)
If there are 2 or more codes, there will be a 2.5 second pause
between each codes. After all the codes have been output,
there will be a 4.0 second pause and they will all be repeated.
HINT:
In the event of a number of trouble codes, indication will
start from the smallest numbered code tot he larger.
If it does not output a DTC or outputs a DTC without termi-
nal connection, proceed to the Tc terminal circuit inspec-
tion on page DI−279.
3. DTC CHECK (Using TOYOTA hand −held tester)
(a) Hook up the TOYOTA hand−held tester to the DLC1.
(b) Read the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the T OYOTA hand −held tester operator ’s manu-
al, for further details.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

H00059
TerminalTime of Body Ground
Tc
Tc
ABOFF
AB
Body
GroundON
OFF
Body
Ground
”1”
”2” ”3”
”4””5”
OFF
1 second
( ± 0.5 sec.) 1 second
( ± 0.5 sec.)
Several
seconds
50 m sec.
50 m sec.
R13819
DI−242
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
4. DTC CLEARANCE (Using diagnosis check wire)
(a) Connect the 2 service wires to terminals Tc and AB of
DLC1.
(b) Turn the ignition switch to ACC or ON and wait approx. 6 seconds.
(c) Starting with the Tc terminal, apply body ground alternate-
ly to terminal Tc and terminal AB twice each in cycles of
1.0 seconds. Confirm that body ground is absolute.
Finally, keep applying body ground to terminal Tc.
HINT:
When alternately grounding terminals Tc and AB, release
ground from one terminal and immediately apply it to the other
terminal within an interval of 0.2 second. If DTCs do not clear,
repeat the above procedure until the codes are cleared.
(d) Several seconds after doing the clearing procedure, the SRS waring light will blink in a 50 m sec. cycle to indicate
the codes have been cleared.
5. USING TOYOTA HAND−HELD TESTER
(a) Hook up the TOYOTA hand−held tester to the DLC1.
(b) Clear the DTC by following the prompts on the tester
screen.
HINT:
Please refer to the T OYOTA hand −held tester operator ’s manu-
al for further details.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

DI5Q5−02
W02056
1
2
3
4
567
8910 A
B
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−245
1996 LAND CRUISER (RM451U)
TERMINALS OF ECM
No.SymbolTerminal Name
A−Electrical Connection Check Mechanism
B−Electrical Connection Check Mechanism
1P−Squib  (Passenger)
2P+Squib  (Passenger)
3D−Squib  (Driver)
4D+Squib  (Driver)
5E1Ground
6E2Ground
7TcDiagnosis
8LASRS Warning Light
9IG2Power Source (IGN Fuse)
10ACCPower Source (CIG Fuse)
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010