Page 789 of 3115
F17613
Normal Signal Waveform
1 V /
Division
2 m/s / DivisionGND
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-537
730 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check skid control ECU communication.
(REFERENCE) INSPECTION USING OSCILLOSCOPE
PREPARATION:
(a) Remove the skid control ECU.
(b) Connect the oscilloscope to each of terminal ENG+ or
TRC+ and GND of the skid control ECU.
CHECK:
Start the engine, and check the signal waveform.
NG Check and replace skid control ECU.
OK
2 Check for open and short circuit in harness and connector between each of ter-
minals ENG+, ENG-, TRC+, TRC- of skid control ECU and ECM (See page
IN-36).
NG Repair or replace harness or connector.
OK
Check and replace ECM.
Page 800 of 3115
F17609
ESS (-)
IG (+)
BAT (+)
DI-548- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
741 Author: Date:
2004 LAND CRUISER (RM1071U)
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 output value of the steering angle sensor.
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 DATALIST mode on the hand-held tester.
CHECK:
Check that the steering wheel turning angle value of the steering angle position sensor displayed on the
hand-held tester is changing when turning the steering wheel.
HINT:
After certifying ºZeroº point calibration of the steering angle sensor (Speed: 21 mph (35 km/h), driving straight
ahead for 10 sec. or more), the value will change.
OK:
Steering wheel turning angle value must be changing.
OK Go to step 5.
NG
2 Check input voltage of the steering angle sensor.
PREPARATION:
Remove the column lower cover.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals 1 and 2, 2 and 9 of
the combination switch wire harness side connector.
OK:
Voltage: 10 to 14 V
NG Check and replace harness and connector.
OK
Page 803 of 3115
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-551
744 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC C1232 / 32 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1232 / 32
Detection of either of the conditions 1. or 2.:
1. At a vehicle speed of 6 mph (10 km/h) or more, when
the condition that ECU terminal GL1 signal change
range is less than 20 mV, and ECU terminal GL2 signal
change range swings by 468 mV or more occurs for 30
sec. or more.
2. At a vehicle speed of 6 mph (10 km/h) or more, when
the condition that ECU terminal GL2 signal change
range is less than 20 mV, and ECU terminal GL1 signal
change range swings by 468 mV or more occurs for 30
sec. or more.
Deceleration sensor
Deceleration sensor circuit
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 output value of the yaw rate (deceleration) sensor.
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 DATALIST mode on the hand-held tester.
CHECK:
Check that the deceleration value of the deceleration sensor displayed on the hand-held tester is changing
when tilting the vehicle.
OK:
Deceleration value must be changing.
OK Check and replace ABS & BA & TRAC & VSC
ECU.
NG
DIC9K-02
Page 817 of 3115
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-565
758 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step1 in case of using the hand-held tester and start from step 2 in case of not using
the hand-held tester.
1 Check output value of the yaw rate (deceleration) sensor.
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 DATALIST mode on the hand-held tester.
CHECK:
Check that the deceleration value of the deceleration sensor displayed on the hand-held tester is changing
when tilting the vehicle.
OK:
Deceleration value must be changing.
OK Check and replace skid control ECU.
NG
Page 823 of 3115
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-571
764 Author: Date:
2004 LAND CRUISER (RM1071U)
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 output value of the master cylinder pressure sensor.
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 DATA LIST mode on the hand-held tester.
CHECK:
Check that the brake fluid pressure value of the master cylinder pressure sensor displayed on the hand-held
tester is changing when depressing the brake pedal.
OK:
Brake fluid pressure value must be changing.
OK Go to step 4.
NG
2 Check master cylinder pressure sensor.
PREPARATION:
(a) Install the LSPV gauge to the front caliper bleeder plug portion, and bleed the LSPV gauge.
SST 09709-29018
(b) Remove the air cleaner inlet and battery clamp cover.
CHECK:
Start the engine and depress the brake pedal, then check the relation between the fluid pressure and voltage
of PMC and E2 terminals of the skid control ECU with connectors still connected.
OK:
Front brake caliper fluid pressureVoltage
0 kPa (0 Kgf/cm2, 0 psi)0.37 to 0.63 V
5,883 kPa (60 kgf/cm2, 853 psi)1.57 to 1.83 V
11,768 kPa (120 kgf/cm2, 1,706 psi)2.77 to 3.03 V
HINT:
Voltage between terminals VCM and E2: 4.7 to 5.3 V
NG Replace master cylinder pressure sensor.
OK
Page 840 of 3115
DI-588- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
781 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1, in case of using the hand-held tester and start from step 3, in case of not
using hand-held tester.
1 Check ABS motor 1 and ABS motor 2 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 motor relays individually when operating it with the hand-held tester.
OK:
The operation sound of the ABS motor 1 relay and ABS motor 2 relay should be heard.
NG Go to step 3.
OK
2 Check for short circuit (to B+) in harness and connector between MT of hydrau-
lic brake booster and skid control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.
Page 870 of 3115
F04508
LOCK
12
12RH Side LH Side
2
4
4 2
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-617
810 Author: Date:
2004 LAND CRUISER (RM1071U)
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 output value of speed sensor.
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 DATALIST mode on the hand-held tester.
CHECK:
Check that there is no difference between the speed value output from the speed sensor displayed on the
hand-held tester and the speed value displayed on the speedometer when driving the vehicle.
OK:
There is almost no difference from the displayed speed value.
HINT:
There is tolerance of ± 10 % in the speedometer indication.
OK Go to step 4.
NG
2 Check speed sensor.
Front:
PREPARATION:
(a) Make sure that there is no looseness at the connector's
locking part and connecting part of the connector.
(b) Disconnect the speed sensor connector.
CHECK:
LH side:
Measure resistance between terminals 2 and 4 of the
speed sensor connector.
RH side:
Measure resistance between terminals 1 and 2 of the
speed sensor connector.
OK:
Resistance: 0.92 to 1.22 kW
CHECK:
LH side:
Measure resistance between terminals 2 and 4 of the
speed sensor connector and body ground.
RH side:
Measure resistance between terminals 1 and 2 of the
speed sensor connector and body ground.
Page 882 of 3115
F17760
ABS & BA & TRAC
& VSC ECU J/B No. 7 D1
DLC1
Cowl Side J/B LH Cowl Side
J/B RHTS TS
E1
TS
CGA42 7D
7B
IF
2D II EB3BW
W-BW W
W-B W-B
W-B
1D7
DLC3
18
4 166
2
512
3
127D
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-653
846 Author: Date:
2004 LAND CRUISER (RM1071U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected by the
DTC check.
Connecting terminals Ts and E
1 of the DLC1 starts the check.
WIRING DIAGRAM
DICAD-01
