1998 TOYOTA LAND CRUISER relay

F00044
1
2
3 4
(+) (-) Continuity1 2
3 4
1
2
3 4 Open
Continuity
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-637
830 Author
: Date
:
2004 LAND CRUISER (RM1071U)
5 Check IG1 No. 1 relay.
PREPARATION:
Remove the IG1 No. 1 relay from the engine room J/B.
CHECK:
Check continuity between the IG1 No. 1 relay terminals listed
in the table below.
OK:
Terminals 3 and 4Continuity
Terminals 1 and 2Open
CHECK:
(a) Apply battery positive voltage between terminals 3 and 4.
(b) Check continuity between terminals.
OK:
Terminals 1 and 2Continuity
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

F17705
SFLH
SFLR
SFRH
SFRR
SRLH
SRLR
SRRH
SRRR
AST
BS
BatterFL Block
MAINABS No.1 ABS
SOL Relay Engine Room R/B ABS & BA & TRAC
& VSC ActuatorABS & BA & TRAC
& VSC ECU
SFLH
SFLR
SFRH
SFRR
SRLH
SRLR
SRRH
SRRR
AST A398
A4121
A44 16 A39
A39
A39
A39
A39
A39
A39
A38
A37A41
A41
A41
A41
A41 7
10
9
4
3
2
1
1
47
8
7
1
9 8
6
19
1 A44
A44
A44
A44 Y
B-Y
LG
B-W
R-W
R-Y
G-Y
P
B-R L-BB-O R-G
W
1
11
1 1
1
1 1 3
6
4
2 Engine Room J/B and
Engine Room R/B
1C B-R
F152SR
R1+
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-529
722 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-531
724 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTCC0278 / 11, C0279 / 12ABS Solenoid Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.DTC Detecting ConditionTrouble Area
C0278 / 11
Conditions 1. and 2. continue for 0.2 sec. or more:
1. ECU terminal IG1 voltage is 9.5 V to 17.0 V and the
solenoid relay is ON, however, the contact point of the
solenoid relay is OFF.
2. With solenoid relay ON, ECU terminal IG1 voltage be-
comes 9.5 V or less and the contact point of the sole-
noid relay does not become ON.

ABS solenoid relay

ABS solenoid relay circuit
C0279 / 12
Immediately after ECU terminal IG1 becomes ON, and
solenoid relay is OFF, however, when the condition that
the solenoid relay due to the contact point is ON continues
for 0.2 sec. or more.
WIRING DIAGRAM
Refer to DTC C0226/21 on page DI-528.
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 ABS solenoid relay operation.
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 the operation sound of the ABS solenoid relay when operating it with the hand-held tester.
OK:
The operation sound of the ABS solenoid relay should be heard.
OK Go to step 6.
NG
DIC98-02

F04447
(-) (+) 1
2
Engine Room J/B
F00042
1 34
6 Open
(+)(-)1 2 3
4
4 5 6
1 2
3
2 5 6
5 Continuity
ContinuityContinuity
Open
DI-532- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
725 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2 Check voltage between terminals 1 and 2 of engine room J/B (for ABS solenoid
relay).
PREPARATION:
Remove the ABS solenoid relay from the engine room J/B.
CHECK:
Measure the voltage between terminals 1 and 2 of the engine
room J/B (for ABS solenoid relay).
OK:
Voltage: 10 to 14 V
NG Check and repair harness or connector.
OK
3 Check ABS solenoid relay.
CHECK:
Check continuity between each terminal of the ABS solenoid
relay.
OK:
Terminals 4 and 6Continuity
(Reference value 80 W)
Terminals 2 and 3Continuity
Terminals 1 and 3Open
CHECK:
(a) Apply battery positive voltage between terminals 4 and 6.
(b) Check continuity between each terminal of the ABS sole-
noid relay.
OK:
Terminals 2 and 3Open
Terminals 1 and 3Continuity
NG Replace ABS solenoid relay.
OK

F02839
ECU ABS Solenoid
Relay
Brake
Booster
3
4
AST
A43
A44
1
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-533
726 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check continuity between terminals 3 of ABS solenoid relay and terminal AST of
skid control ECU.
CHECK:
Check continuity between terminal 3 of the ABS solenoid relay
and terminal AST of the skid control ECU.
OK:
Continuity
HINT:
There is resistance of 33 ± 3 W between terminals 4 of connec-
tor A43 and terminal 1 of connector A44.
NG Repair or replace harness, connector or hy-
draulic brake booster.
OK
5 Check for open and short circuit in harness and connector between ABS sole-
noid relay and skid control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection. If the connections are normal, the ECU may be defective.

F17708
ABS & BA & TRAC
& VSC ECU ABS & BA & TRAC
& VSC Actuator
Engine Room R/B
Engine Room J/B and
Engine Room R/B
FL Block
BatterySTR
SA3
SA2
SA1
SR A41
A41
A41
A41
A41
R1+
A411192 3 4 5
G-Y
G-W
B
G A396
5
A39
11
A39
12
A39
A374 STR
SA3
SA2
SA1
BSL-B
1 ABS SOL Relay
1
1131
4 6
1
1 1C1 ABS No.1
F15 MAINB-GB-RP G-Y
2
2 B-G DI-544
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
737 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

F17753
ABS & BA & TRAC
& VSC ECU C17
Combination Meter
B-R B-W14
A43
23
A43
1
F16 SS1+
SS1-
IG1
ESS3
11
1
2W
GWW
G
G
6II3 27
IG1 15
IG1 16
IH2II3
L-B
W-B SB2C1 39
16
37 2E
2E 2Q
3
215B-GSS1+
SS1-
Battery
IFIF
2Q Cowl Side J/B LHIH29 42IG1
AM1
ALTFL Block AM1
ECU-IG1 26
23Cowl Side J/B LH
IG1 No.2 Relay
I18
Ignition SW SB
J/B No.2
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-547
740 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

F17758
Cowl Side J/B LH BatteryEngine Room J/B
Cowl Side J/B LH
Cowl Side J/B RH J4
J/C
Cowl Side J/B LH
IG1 No. 2 Relay
ECU-IG1
AM1
ALT
MAINFL Block
EE IFIG2
IG1
GND4
GND3
GND1
GND2 A44
A42
A42 A42
A41
A41 2A
2B3
13 J/B No. 2
IFF15 F16
2 12C1
2E 2E
2B
3918 37
12
533B 3E22 4IGN2A
2E41 10 1
1C 1B9 AM2
W-R
B-R B-R
B-R B-G
W-R
L-B
B-R
AA
B-G
W-B B-W
W-B
W-B 4
62
7 IG1
AM1
AM2 IG2
W-B
22
6
17
8
31
6 ABS & BA & TRAC
& VSC ECU
W-B
W-B
W-B
W-B
W-B I18
Ignition SW
DI-558- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
751 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC C1241 / 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1241 / 41
Detection of any of the conditions 1. through 4.:
1. Vehicle speed is 1.9 mph (3 km/h) or more and voltage
of ECU terminal IG remains below 9.5 V for more than
10 sec.
2. While the condition that the solenoid relay is ON contin-
ues, ECU terminal IG1 voltage becomes 9.5 V or less,
and the condition that the contact point of the solenoid
relay is OFF continues for 0.2 sec. or more.
3. The condition that ECU terminal IG1 voltage is more
than 17.0 V continues for 1.2 sec. or more.
4. While the solenoid relay outputs ON signal, ECU termi-
nal IG1 voltage becomes more than 17.0 V, and the
condition that the contact point of the solenoid relay is
OFF continues for 0.2 sec. or more.

Battery

IC regulator

Power source circuit
WIRING DIAGRAM
DIC9N-01