TOYOTA LAND CRUISER 1998 Factory Repair Manual

Manufacturer: TOYOTA, Model Year: 1998, Model line: LAND CRUISER, Model: TOYOTA LAND CRUISER 1998
Pages: 3115, PDF Size: 54.88 MB

Page 841 of 3115

F04446
(+)
(-) Engine Room J/B
11
ABS
Motor2
Relay
ABS Motor1 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-589
782 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check voltage between terminal 1 of engine room J/B (for ABS motor 1 relay and
ABS motor 2 relay) and body ground.
PREPARATION:
Remove the ABS motor 1 relay and ABS motor 2 relay from the
engine room J/B.
CHECK:
Measure voltage between terminal 1 of the engine room J/B (for
ABS motor 1 relay and ABS motor 2 relay) and body ground.
OK:
Voltage: 10 to 14 V
NG Check and repair harness or connector.
OK
4 Check ABS motor 1 relay and ABS motor 2 relay.
PREPARATION:
Remove the ABS motor 1 relay and ABS motor 2 relay from the
engine room J/B.
CHECK:
Check continuity between the motor relay terminals listed in the
table below.
OK:
Terminals 3 and 4Continuity
(Reference value *1)
Terminals 1 and 2Open
*1: ABS motor 1 relay: 54 W
ABS motor 2 relay: 62 W
CHECK:
(a) Apply battery positive voltage between terminals 3 and 4.
(b) Check continuity between terminals.
OK:
Terminals 1 and 2Continuity

Page 842 of 3115

F02840
ABS Motor 1
Relay
2
2ABS
Motor 2
Relay
Motor Relay322
3
ECU7
MT
DI-590- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
783 Author: Date:
2004 LAND CRUISER (RM1071U)
NG Replace ABS motor 1 relay or ABS motor 2
relay.
OK
5 Check continuity between terminal MT of the ABS & BA & TRAC & VSC ECU and
terminals BM1 and BM2, respectively.
PREPARATION:
Disconnect the 2 connectors from the hydraulic brake booster.
CHECK:
(a) Check continuity between terminal BM1 of the ABS motor
2 relay and terminal MT of the ABS & BA & TRAC & VSC
ECU.
(b) Check continuity between terminal BM2 of the ABS motor
1 relay and terminal MT of the ABS & BA & TRAC & VSC
ECU.
OK:
Continuity
HINT:
There is resistance of 33 ± 3 W between terminal BM1or BM2
and MT of the hydraulic brake booster.
NG Repair or replace harness, connector or hy-
draulic brake booster.
OK

Page 843 of 3115

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-591
784 Author: Date:
2004 LAND CRUISER (RM1071U)
6 Check for open and short circuit in harness and connector between ABS motor1
and ABS motor2 relay and ABS & BA & TRAC & VSC ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
Check and replace ABS & BA & TRAC & VSC
ECU.

Page 844 of 3115

F17713
ABS & BA & TRAC
& VSC ECU ABS & BA & TRAC
& VSC Actuator
Engine Room R/B
Cowl Side J/B LHFL Block
Battery ABS MTR2 Relay
ABS MTR1 RelayPH A4111
PL A449
MR2 A442 O
W
Y-B A373
A384 PH
PL
3
A38
BM2
2
A37
BM1
A375
PHG
1
A37 GND1
1
A40 GND
2
A38 PLG
6
A38 GND2
EE
IF L-R
R
W-B
W-B
W-B
W-B
W-B
W-BW-B
W-B
W-B W-B W-B
2A3 2B 13
F152A41 MR129 A41R1+ 1 A44 R2+3
1
1
1C
1 1
2ABS No.2
3 4 2
1 1
2 43 1
1
1
1B-G
MAIN RW-L
P DI-592
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
785 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC C1254 / 54 Pressure Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1254 / 54
Either of the following 1. or 2. is detected:
1. After turning the ignition switch ON, short or open circuit
in pressure switch (PL) continued for more than 1 sec.
2. After turning the ignition switch ON, open in pressure
switch (PH) continued for more than 1 sec.
Pressure switch (PH or PL)
Pressure switch circuit
WIRING DIAGRAM
DIC9W-01

Page 845 of 3115

F09987
LOCK
PLGPL
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-593
786 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check pressure switch (PL) resistance.
PREPARATION:
(a) Disconnect the connector (8P) from the hydraulic brake
booster.
(b) With the ignition switch OFF, depress the brake pedal
more than 40 times to decrease the accumulator pres-
sure.
HINT:
When pressure in the power supply system is released, reac-
tion force becomes light and stroke becomes longer.
CHECK:
Measure resistance between terminals PL and PLG of the hy-
draulic brake booster connector.
OK:
Resistance: 5.1 to 6.3 kW
HINT:
After inspection, connect the connector and clear the DTC (See
page DI-505).
NG Replace hydraulic brake booster assembly.
OK

Page 846 of 3115

F06043
LOCK
PH
PHG
DI-594- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
787 Author: Date:
2004 LAND CRUISER (RM1071U)
2 Check pressure switch (PH) resistance.
PREPARATION:
(a) Disconnect the connector (5P) from the hydraulic brake
booster.
(b) With the ignition switch OFF, depress the brake pedal
more than 40 times to decrease the accumulator pres-
sure.
HINT:
When pressure in the power supply system is released, reac-
tion force becomes light and stroke becomes longer.
CHECK:
Measure resistance between terminals PH and PHG of the hy-
draulic brake booster connector.
OK:
Resistance: 0.9 to 1.1 kW
HINT:
After inspection, connect the connector and clear the DTC (See
page DI-505).
NG Replace hydraulic brake booster assembly.
OK
3 Check for open and short circuit in harness and connector between pressure
switch and skid control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.

Page 847 of 3115

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-595
788 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC C1256 / 56 Accumulator Low Pressure Malfunc-
tion
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1256 / 56
Any of the following 1. through 7. is detected:
1. With the vehicle running, when the pressure switch (PL)
detects high pressure, although ABS, TRAC or VSC
does not control, the pressure switch (PL) detects low
pressure for more than 1.4 sec.
2. With the vehicle running, when the pressure switch
(PL) detects high pressure, although ABS, TRAC or
VSC controls, the pressure switch (PL) detects low
pressure for more than 0.2 sec.
3. After the ignition switch is turned ON, the pressure
switch (PL) detects low pressure for more than 64 sec.
4. With the vehicle running, after ignition switch has been
ON, the pressure switch (PL) detects low pressure for
more than 0.2 sec. although ABS, TRAC, or VSC does
not control and when the pressure switch is ON and
stuck under high pressure.
5. With the vehicle running, after ignition switch is ON,
the pressure switch (PL) detects low pressure for more
than 0.2 sec. when ABS, TRAC or VSC controls, the
pressure switch is ON and stuck under high pressure.
6. With the vehicle running, after ignition switch is ON, the
pressure switch (PL) is stuck to under low pressure
although ABS, TRAC or VSC does not control for more
than 1.4 sec.
7. With the vehicle running, after ignition switch is ON, the
pressure switch (PL) is stuck under low pressure when
ABS, TRAC or VSC controls for more than 0.2 sec.
Accumulator
Pressure switch (PH or PL)
Hydraulic brake booster pump motor
DIC9X-02

Page 848 of 3115

Page 849 of 3115

F02859
(-)
(+)
(-)
(+)
BM2
BM1EM1 EM2
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-597
790 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check accumulator operation.
PREPARATION:
(a) Turn the ignition switch OFF, and depress the brake pedal 40 times or more.
HINT:
When pressure in the power supply system is released, reaction force becomes light and stroke becomes
longer.
(b) Install the LSPV gauge (SST) to the rear brake caliper and bleed air.
SST 09709-29018
CHECK:
Depress the brake pedal with a force of more than 294 N (30 kgf, 66 lbf) and turn the ignition switch ON, then
check the rear brake caliper pressure when an increase of pressure changes from acutely to mildly.
OK:
5,099 to 8,924 kPa (52 to 91 kgf/cm2, 740 to 1,294 psi) at 20°C (68°F)
HINT:
If the value is not within the standard, cool the engine room and check it again.
NG Replace accumulator.
OK
2 Check operation of hydraulic brake booster pump motor.
PREPARATION:
Disconnect the 2 connectors from the hydraulic brake booster.
CHECK:
Connect the battery positive lead to BM1 or BM2 terminal
and the battery negative lead to EM1 or EM2 terminal of the
hydraulic brake booster (pump motor) connector.
OK:
The operation sound of the pump motor should be
heard.
NG Go to step 7.
OK

Page 850 of 3115

F04506
LOCKON
PH
PHG
F06043
LOCK
PH
PHG
DI-598- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
791 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check pressure switch (PH) operation.
PREPARATION:
(a) Turn the ignition switch OFF, and depress the brake pedal
40 times or more.
HINT:
When pressure in the power supply system is released, reac-
tion force becomes light and stroke becomes longer.
(b) Install the LSPV gauge (SST) to the rear brake caliper
and bleed air.
SST 09709-29018
CHECK:
While checking the voltage between terminals PH and PHG of
the hydraulic brake booster, depress the brake pedal with a
force of more than 294 N (30 kgf, 66 lbf) and turn the ignition
switch ON, then check the rear wheel cylinder pressure when
voltage changes from 6 V to 0 V.
OK:
12,553 to 20,104 kpa (128 to 205 kgf´cm2, 1,820 to
2,916 psi)
PREPARATION:
Turn the ignition switch OFF and disconnect the connector (5P)
from the hydraulic brake booster.
CHECK:
While checking the resistance between terminals PH and PHG,
depress the brake pedal changing the force in a range of 197
N (20 kgf, 44 lbf) to 294 N (30 kgf, 66 lbf) and check the rear
wheel cylinder pressure when resistance changes from 0 kW to
1 kW between PH and PHG.
OK:
11,964 to 18,240 kpa (122 to 186 kgf´cm2, 1,735 to
2,645 psi)
HINT:
After inspection, connect the connector, fill brake reservoir with
brake fluid and clear the DTC (See page DI-505).
OK Go to step 5.
NG

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