Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Land Cruiser 1986.1998-2007 Approved 98-07 Diagnostics
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DI-624 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
DICA4-01
DTC Always ON Malfunction in ECU
VSC TRAC Warning Light Circuit
CIRCUIT DESCRIPTION
L Power source circuit
Always ON There is a malfunction in the ECU internal circuit. L Skid control ECU
L VSC TRAC warning light circuit
HINT:
If the fail safe function is activated in the VSC system, "VSC OFF" indicator light lights up.
WIRING DIAGRAM
D4
Detection SW ABS & BA & TRAC
(Center Diff. Lock) & VSC ECU
2
W-B P-B SB
IX1
1 2
Cowl Side J/B RH
Cowl Side J/B RH
4 MET 7
3E 3Q 56 3 3
P-B
3Q 3B A43 EXI
J4
J/C SB
B-R B-R Cowl Side J/B RH
A A
26 14 7
I18 SB L-R
Ignition SW 3Q 3B A43 WT
W-R AM2 IG2
7 6
SB
Combination Meter
Cowl Side J/B LH 8 IX1
41 10 1
2E 2A W-R C15
10
BR
Engine Room J/B C12
1 AM2 9 VSC OFF
1C 1B
B-G
2 MAIN 17
F15 C13
EC FL Block EC
Battery
F17763
2004 LAND CRUISER (RM1071U)
Author : Date : 817
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-625
BRAKE ASSIST (BA) SYSTEM
INSPECTION PROCEDURE
1 Check that the ECU connectors are securely connected to the ECU.
NO Connect the connector to the ECU.
YES
2 Is DTC output for VSC?
Check the DTC on page DI-505 .
YES Repair circuit indicated by the output code.
NO
3 Does VSC TRAC warning light go off?
YES Check for open or short circuit in harness and
connector between ECU-IG fuse and ECU (See
page IN-36 ).
NO
4 Check battery positive voltage.
PREPARATION:
Start the engine.
CHECK:
Check the battery positive voltage.
OK:
Voltage: 10 to 16 V
NG Check and repair the charging system.
OK
2004 LAND CRUISER (RM1071U)
Author : Date : 818
DI-626 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
5 Check operation of the VSC TRAC warning light.
In case of using the hand-held tester:
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand-held tester.
CHECK:
Check that "ON" and "OFF" of the VSC TRAC warning light can be shown on the combination meter on the
hand-held tester.
In case of not using the hand-held tester:
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the skid control ECU.
(c) Turn the ignition switch ON.
CHECK:
Check that the VSC TRAC warning light goes off.
NG Check and replace combination meter (See
page BE-2 ).
OK
6 Check for short circuit in harness and connector between combination meter and skid
control ECU, combination meter and DLC1 (See page IN-36 ).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.
2004 LAND CRUISER (RM1071U)
Author : Date : 819
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-627
BRAKE ASSIST (BA) SYSTEM
DICA5-02
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.
Connect terminals Tc and E1 of the DLC1 or Tc and CG of DLC3 to make the ABS warning light blink and
output the DTC.
WIRING DIAGRAM
Combination Meter ABS & BA & TRAC
& VSC ECU
Cowl Side J/B RH
12 5 4 1
SB R-L
C12 3Q 3A A42 WA
ABS
Cowl Side J/B LH Engine Room J/B
41 10 9 AM2 1
2E 2A W-R 1B 1C
I18
Ignition SW
W-R AM2 IG2 B-R
7 6
10 Cowl Side J/B RH J4
C12 7 MET J/C
4
SB 3Q B-R
3E
A A
1
SB B-G
C15
8
BR IX1 FL Block
EC 2 MAIN Battery
F15
F17718 F18533
2004 LAND CRUISER (RM1071U)
Author : Date : 820
DI-628 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
INSPECTION PROCEDURE
HINT:
Troubleshoot in accordance with the table below for each trouble symptom.
ABS warning light does not light up *1
ABS warning light remains on *2
*1: Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using the hand-held tester.
*2: After inspection with step 4, start the inspection from step 5 in case of using the hand-held tester and
start from step 6 in case of not using hand-held tester.
1 Check operation of the ABS warning light.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand-held tester.
CHECK:
Check that "ON" and "OFF" of the ABS warning light can be shown on the combination meter on the hand-
held tester.
OK Check and replace skid control ECU.
NG
2 Does the warning lights other than ABS warning light come on?
YES Repair ABS warning light bulb or combination
meter assembly.
NO
2004 LAND CRUISER (RM1071U)
Author : Date : 821
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-629
BRAKE ASSIST (BA) SYSTEM
3 Check IG1 No. 1 relay.
PREPARATION:
Remove the IG1 No. 1 relay from the engine room J/B.
2 1 CHECK:
Check continuity between the IG1 No. 1 relay terminals listed
4 3 in the table below.
OK:
Open
Terminals 3 and 4 Continuity
1
Terminals 1 and 2 Open
2
4
Continuity
3
Continuity
1
CHECK:
2 (a) Apply battery positive voltage between terminals 3 and 4.
(b) Check continuity between terminals.
OK:
(-) 4 3
Terminals 1 and 2 Continuity
(+)
F00044
NG Replace IG1 No. 1 relay.
OK
Check for open circuit in harness and connector between IG1 No. 1 relay and combination meter
(See page IN-36 ).
2004 LAND CRUISER (RM1071U)
Author : Date : 822
DI-630 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
4 Check that the ECU connectors are securely connected to the ECU.
NO Connect the connector to the ECU.
YES
5 Check operation of the ABS warning light (See step 1).
OK Check and replace skid control ECU.
NG
6 Is DTC output?
Check the DTC on page DI-505 .
YES Repair circuit indicated by the output code.
NO
7 Check for short circuit in harness and connector between ABS warning light and skid
control ECU (See page IN-36 ).
NG Repair or replace harness or connector.
OK
Check and repair skid control ECU.
2004 LAND CRUISER (RM1071U)
Author : Date : 823
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-621
BRAKE ASSIST (BA) SYSTEM
DICA3-01
DTC Always ON Malfunction in ECU
CIRCUIT DESCRIPTION
DTC No. DTC Detecting Condition Trouble Area
L Battery
Either of the following 1. or 2. is detected:
L IC regulator
Always ON 1. The ECU connectors are disconnected from the ECU.
L Power source circuit
2. There is a malfunction in the ECU internal circuit.
L Skid control ECU
HINT:
The hand-held tester may not be used when the ECU is abnormal.
WIRING DIAGRAM
Combination Meter ABS & BA & TRAC
Cowl Side J/B RH & VSC ECU
12 5 4 1
SB R-L
C12 3Q 3A A42 WA
22
ABS B-R
A44 IG2
Cowl Side J/B RH
10 7 MET
SB
C12 3Q
22 IGN 4
B-R
1 C15 3B 3E
Engine Room J/B
1 AM2 9
SB Cowl Side J/B LH A
1C 1B
10 41 J4
W-R J/C
2A 2E
8 IX1 Cowl Side J/B LH A
L-B
IG1 No.2 Relay 37
2E W-R I18 B-R
1 2 Ignition SW
ECU-IG1 18
2B AM2 IG2
5 3
7 6
BR 1 AM1 39
B-R AM1 IG1
2C 2E
2 4 6
B-W IG1
A42
B-G
1 17
J/B No.2 ALT W-B W-B
F16 A42 GND4
3 W-B 8
2 MAIN W-B W-B
B-G 2A A42 GND3
F15
13 31
W-B W-B
FL Block 2B A41 GND1
EC IF Battery EE IF 6
Cowl Side J/B LH W-B
A41 GND2
F17750 F18532
2004 LAND CRUISER (RM1071U)
Author : Date : 814
DI-622 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
INSPECTION PROCEDURE
1 Check that the ECU connectors are securely connected to the ECU.
NO Connect the connector to the ECU.
YES
2 Is DTC output?
Check the DTC on page DI-505 .
YES Repair circuit indicated by the output code .
NO
3 Does ABS warning light go off?
YES Check for open or short circuit in harness and
connector between ECU-IG fuse and ECU (See
page IN-36 ).
NO
4 Check battery positive voltage.
PREPARATION:
Start the engine.
CHECK:
Check the battery positive voltage.
OK:
Voltage: 10 to 14 V
NG Check and repair the charging system.
OK
2004 LAND CRUISER (RM1071U)
Author : Date : 815
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-623
BRAKE ASSIST (BA) SYSTEM
5 Check operation of the ABS warning light.
In case of using the hand-held tester:
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand-held tester.
CHECK:
Check that "ON" and "OFF" of the ABS warning light can be shown on the combination meter by the hand-
held tester.
In case of not using the hand-held tester:
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the skid control ECU.
(c) Using a service wire, connect terminal WA of the skid control ECU harness side connector and body
ground.
(d) Turn the ignition switch ON.
CHECK:
Check that the ABS warning goes off.
OK Check and replace combination meter (See
page BE-2 ).
NG
6 Check for short circuit in harness and connector between combination meter
and skid control ECU, combination meter and DLC1 (See page
IN-36 ).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.
2004 LAND CRUISER (RM1071U)
Author : Date : 816
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-649
BRAKE ASSIST (BA) SYSTEM
DICAB-01
Brake Warning and VSC Buzzer Circuit
CIRCUIT DESCRIPTION
The brake warning and VSC buzzer sounds while the accumulator pressure is abnormally low or an ab-
normality casing low fluid pressure occurs VSC is activated.
WIRING DIAGRAM
ABS & BA & TRAC
& VSC ECU
Cowl Side J/B LH V8
VSC Warmning Buzzer
ECU-IG1 18 2
B-W L
2B Buzzer A42 BZ
2 1
F09989
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using the hand-held tester.
1 Check operation of the brake warning and VSC buzzer.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand-held tester.
CHECK:
Check that brake warning and VSC buzzer sounds "ON" and "OFF" with the hand-held tester.
OK Check and replace skid control ECU.
NG
2004 LAND CRUISER (RM1071U)
Author : Date : 842
DI-650 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
2 Check brake warning and VSC buzzer.
PREPARATION:
1 Disconnect the brake warning and VSC buzzer connector.
CHECK:
(+) (-) 2
Apply battery positive voltage to terminals 1 and 2 of the brake
warning and VSC buzzer connector. Check that the brake warn-
ing light comes on and the VSC buzzer sounds.
F02192
NG Replace brake warning and VSC buzzer.
OK
3 Check for open and short circuit in harness and connector between skid control
ECU and brake warning and VSC buzzer (See page IN-36 ).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.
2004 LAND CRUISER (RM1071U)
Author : Date : 843
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-635
BRAKE ASSIST (BA) SYSTEM
DICA7-02
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION
The BRAKE warning light lights up while the brake fluid is insufficient and EBD is abnormal.
WIRING DIAGRAM
ABS & BA
& TRAC ABS & BA & TRAC
& VSC Actuator & VSC ECU
Combination Meter Cowl Side J/B RH
19 6 11 5
SB Y-G
C14 3Q 3A A43 BRL
Brake 10 7 MET 4
SB B-R
C12 3Q 3E
1 8
SB SB
C15 IX1
20
C14
SB
Cowl Side J/B LH
2 20 36
Y-G I18
LBL A40 2B 2Q J4
Ignition SW J/C
10 41
W-R B-R
2A 2E
7 6 A A
AM2 IG2
27 4 13
R-W
2K 2B A42 PKB
W-R R-W
Engine Room J/B F15
FL Block
9 AM2 1
B-G
1B 1C BR
2 MAIN
1
P8
Battery Parking EC
Brake
SW
F16083
2004 LAND CRUISER (RM1071U)
Author : Date : 828
DI-636 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
INSPECTION PROCEDURE
1 Check parking brake switch circuit (See page BE-63 ).
NG Repair or replace parking brake switch circuit.
OK
2 Check brake fluid level warning switch circuit (See page BE-63 ).
NG Repair or replace brake fluid level warning
switch circuit.
OK
3 Is DTC output for ABS?
YES Repair circuit indicated by the output code.
NO
4 Do the warning lights other than BRAKE warning light come on?
YES Go to step 6.
NO
2004 LAND CRUISER (RM1071U)
Author : Date : 829
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-637
BRAKE ASSIST (BA) SYSTEM
5 Check IG1 No. 1 relay.
PREPARATION:
Remove the IG1 No. 1 relay from the engine room J/B.
2 1 CHECK:
Check continuity between the IG1 No. 1 relay terminals listed
4 3 in the table below.
OK:
Open
Terminals 3 and 4 Continuity
1
Terminals 1 and 2 Open
2
4
Continuity
3
Continuity
1
CHECK:
2 (a) Apply battery positive voltage between terminals 3 and 4.
(b) Check continuity between terminals.
OK:
(-) 4 3
Terminals 1 and 2 Continuity
(+)
F00044
NG Replace IG1 No. 1 relay.
OK
Check for open circuit in harness and connector between IG1 No. 1 relay and combination meter
(See page IN-36 ).
6 Check that the ECU connectors are securely connected to the ECU.
NO Connect the connector to the ECU.
YES
2004 LAND CRUISER (RM1071U)
Author : Date : 830
DI-638 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
7 Check BRAKE warning light.
Check if that the open circuit in the combination meter circuit (See page BE-58 ).
NG Repair brake warning light bulb or combination
meter assembly.
OK
8 Check for short circuit in harness and connector between brake warning light and skid
control ECU (See page IN-36 ).
NG Repair or replace harness or connector.
OK
Check and repair skid control ECU.
2004 LAND CRUISER (RM1071U)
Author : Date : 831
DI-528 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
DIC95-01
DTC C0226 / 21 - C0256 / 24 ABS Solenoid Circuit
CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel
cylinders thus controlling the braking force.
DTC No. DTC Detecting Condition Trouble Area
Open or short in SFRH or SFRR circuit continues for 0.015 L Hydraulic brake booster
C0226 / 21
sec. or more. L SFRH or SFRR circuit
Open or short in SFLH or SFLR circuit continues for 0.015 L Hydraulic brake booster
C0236 / 22
sec. or more. L SFLH or SFLR circuit
Open or short in SRRH or SRRR circuit continues for 0.015 L Hydraulic brake booster
C0246 / 23
sec. or more. L SRRH or SRRR circuit
Open or short in SRLH or SRLR circuit continues for 0.015 L Hydraulic brake booster
C0256 / 24
sec. or more. L SRLH or SRLR circuit
2004 LAND CRUISER (RM1071U)
Author : Date : 721
DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) & DI-529
BRAKE ASSIST (BA) SYSTEM
WIRING DIAGRAM
ABS & BA & TRAC ABS & BA & TRAC
& VSC Actuator & VSC ECU
8 21
Y
SFLH A39 A41 SFLH
7 7
SFLR A39 B-Y
A41 SFLR
10 16
LG
SFRH A39 A44 SFRH
9 8
B-W
SFRR A39 A44 SFRR
4 7
R-W
SRLH A39 A44 SRLH
3 1
SRLR A39 R-G
A44 SRLR
2 8
W
SRRH A39 A41 SRRH
1 9
B-O
SRRR A39 A41 SRRR
1 6
R-Y
AST A38 A44 AST
19
G-Y
A41 SR
Engine Room R/B
ABS
SOL Relay
4
L-B
BS A37 1 1
3 1
1
P
1 1 A41 R1+
6 4
B-R
Engine Room J/B and
FL Block Engine Room R/B
Batter MAIN 2 1 ABS No.1
B-R
F15 1C 1
1 2
F17705
2004 LAND CRUISER (RM1071U)
Author : Date : 722
DI-530 DIAGNOSTICS - ABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
INSPECTION PROCEDURE
1 Check hydraulic brake booster solenoid.
LOCK A45 PREPARATION:
2 Disconnect the 2 connectors from the hydraulic brake booster.
3 1 CHECK:
4
Check continuity between terminals A43 - 4 and A45 - 1, 2, 3,
A43 4, 7, 8, 9 and 10 of the hydraulic brake booster connector.
7 OK:
10 9 8 Continuity
HINT:
4
F02855 Resistance of each solenoid at 20 ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo