1986 TOYOTA LAND CRUISER brake light

F02201
DLC1 E1
TcTs
BR3904
0.13 sec. 0.13 sec.
ON
OFF
F02135
Start Position
End PositionWithin ± 5° DI-514
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
707 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(a) Procedures for test mode:
(1) Turn the ignition switch OFF.
(2) Check that the shift lever is in the P position, and
turn the steering wheel to the neutral position.
(3) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843-18020
(4) Start the engine.
(5) Check that the VSC TRAC warning light blinks.
HINT:
If the VSC TRAC warning light does not blink, inspect the VSC
TRAC warning light circuit and Ts terminal circuit (See page
DI-631 and DI-653).
Turn the steering wheel either to the left or right 450° or
more from the vehicle stationary condition, and turn back
the steering wheel to the straight ahead position.
(b) Keep the vehicle stationary on a level place for 1 sec. or
more.
(c) Check the yaw rate sensor.
Shift the shift lever to the D position and drive the vehicle
at a vehicle speed of approx. 5 km/h (3 mph), turn the
steering wheel either to the left or right 90° or more, and
maintain this angle until the vehicle has turned 180°.
Stop the vehicle and shift the shift lever to the P
position. Check that the VSC buzzer sounds for 3
sec.
If the VSC buzzer sounds, the sensor check is in normal
completion.
If the VSC buzzer does not sound, do the sensor check again.
If the VSC buzzer still does not sound, check the VSC buzzer
circuit, then do the sensor check again.
Trouble AreaSee page
VSC buzzer circuitDI-649
HINT:

Make a 180° turn. At the end of the turn, the direction of
the vehicle should be within 180°± 5° of its start position.

Do not spin the wheels.
(d) Read the DTC.
(1) Using SST, connect terminals Tc and E
1 of the
DLC1 or Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
(2) Read the number of times the VSC TRAC warning
light blinks.
HINT:

See the list of DTC shown on the next page.

If every sensor is normal, a normal code is output. (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated.)

F02201
DLC1
E
1
Ts DI-516
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
709 Author
: Date
:
2004 LAND CRUISER (RM1071U)
8. IF NECESSARY, PERFORM ZERO POINT CALIBRA-
TION OF YAW RATE AND DECELERATION SENSORS
HINT:

When having replaced the yaw rate sensor, deceleration
sensor or/and the ECU, make sure to perform a yaw rate
and deceleration sensors zero point calibration.

This operation is also required when the deceleration
sensor or yaw rate sensor has been replaced since the
calibrated zero point of both sensors will be erased.
NOTICE:

While obtaining the zero point, do not vibrate the ve-
hicle by tilting, moving or shaking it and keep it in a
stationary condition. (Do not start the engine.)

Be sure to do this on a level surface (within an inclina-
tion of 1 %).
(a) Clear the zero point of the yaw rate and deceleration sen-
sors.
(1) Shift the shift lever to P range.
(2) Turn the ignition switch ON in a stationary condition.
(3) With the ignition switch ON, using SST, repeat a
cycle of short and open between terminals Ts and
E
1 of the DLC1 4 times or more within 8 sec. Check
that the VSC warning light is lit indicating the re-
corded zero point is erased.
SST 09843-18020
(4) Turn the ignition switch OFF.
(b) Obtain the zero point of the yaw rate sensor.
(1) Disconnect terminals Ts and E
1 of the DLC1.
(2) Turn the ignition switch ON.
HINT:
The vehicle should be in a stationary condition with the shift le-
ver in the P position.
(3) Check that the lighted VSC warning light goes off
about 15 sec. after the ignition switch is turned ON.
HINT:
Even if the ignition is not turned OFF in step (a)-(4) and remains
ON, a yaw rate sensor zero point calibration can be completed.
In this case, the VSC warning light is lit about 15 sec. and starts
blinking. (Normal code)
(4) After ensuring that the VSC warning light remains
OFF for 2 sec., turn the ignition switch OFF.
HINT:
If the ignition switch is not turned OFF in step (a)-(4), ensure
the blinking of the VSC warning light for 2 sec. and turn the igni-
tion switch OFF.

F02201
DLC1
E
1
Ts
BR3904
0.13 sec. 0.13 sec.
ON
OFF
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-517
710 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(c) Perform a deceleration sensor zero point calibration.
NOTICE:
After step (b) (a yaw rate sensor zero point calibration), the
VSC warning light goes off. At this time, if the vehicle is
driven without performing step (c) (a deceleration sensor
zero point calibration), deceleration sensor zero point cal-
ibration malfunction will be detected and the VSC warning
light will light up. Therefore, perform step (c) right after step
(b).
(1) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843-18020
(2) Turn the ignition switch ON.
HINT:
Keep the vehicle in a stationary condition with the shift lever in
the P position.
(3) After turning the ignition switch ON, check that the
VSC warning light is lit for about 4 sec. and then
starts quick blinking at 0.13 sec. intervals.
(4) After ensuring the blinking of the VSC warning light
for 2 sec., turn the ignition switch OFF.
(5) Remove the SST and disconnect terminals Ts and
E1 of the DLC1.
SST 09843-18020

DIC91-01
DI-526- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
719 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
NOTICE:
When replacing the skid control ECU, sensor, etc., turn the ignition switch OFF.
SymptomSuspected AreaSee page
ABS does not operate
BA does not operate
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Reconfirm the DTC and check that the normal code is
output.
2. IG power source circuit
3. Speed sensor circuit
4. Check the hydraulic brake booster with a checker or
hand-held tester.
If abnormal, check the hydraulic circuit for leakage (See
page DI-655).
DI-505
DI-558
DI-615
BR-40
ABS does not operate efficiently
BA does not operate
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Reconfirm the DTC and check that the normal code is
output.
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the hydraulic brake booster with a checker or
hand-held tester.
If abnormal, check the hydraulic circuit for leakage (See
page DI-655).
DI-505
DI-615
DI-573
BR-40
ABS warning light abnormal1. ABS warning light circuit
2. Skid control ECUDI-627
IN-36
DTC check cannot be done
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. ABS warning light circuit
2. VSC OFF indicator light, center diff. lock indicator switch
circuit
3. Center diff. lock indicator switch circuit
4. Tc terminal circuit
DI-627
DI-645
DI-612
DI-651
Speed sensor signal check cannot be done1. Ts terminal circuit
2. Skid control ECUDI-653
IN-36
TRAC does not operate
Only when 1. to 4. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Check the DTC, reconfirming that the normal code is
output.
2. IG power source circuit
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
DI-505
DI-558
DI-655
DI-615
VSC does not operate
Only when 1. to 7. are all normal and the problem is still
occurring, replace the skid control ECU.
1. Check the DTC, reconfirming that the normal code is
output.
2. IG power source circuit
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
5. Deceleration sensor circuit
6. Yaw rate sensor circuit
7. Steering angle sensor circuit
DI-505
DI-558
DI-655
DI-615
DI-570
DI-553
DI-605

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-527
720 Author
: Date
:
2004 LAND CRUISER (RM1071U) VSC TRAC warning light abnormal
1. VSC TRAC warning light circuit
2. Skid control ECUDI-631
IN-36
BRAKE warning light abnormal1. BRAKE warning light circuit
2. Skid control ECUDI-635
IN-36
SLIP indicator light abnormal1. SLIP indicator light circuit
2. Skid control ECUDI-639
IN-36
VSC OFF indicator abnormal1. VSC OFF indicator light, center diff. lock switch circuit
2. Skid control ECUDI-645
IN-36
TRAC indicator light abnormal1. TRAC indicator light circuit
2. Skid control ECUDI-642
IN-36

DIC8Z-01
F02094
A44 A43
A42A41
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-523
716 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
SA1 (A41 - 2) - GND (A41 - 6,
31, A42 - 8, 17)G - W-BIG switch ON, ABS warning light OFF10 to 14 V
SA2 (A41 - 3) - GND (A41 - 6,
31, A42 - 8, 17)B - W-BIG switch ON, ABS warning light OFF10 to 14 V
SA3 (A41 - 4) - GND (A41 - 6,
31, A42 - 8, 17)G-W - W-BIG switch ON, ABS warning light OFF10 to 14 V
STR (A41 - 5) - GND (A41 - 6,
31, A42 - 8, 17)G-Y - W-BIG switch ON, ABS warning light OFF10 to 14 V
SFLR (A41 - 7) - GND (A41 -
6, 31, A42 - 8, 17)B-Y - W-BIG switch ON, ABS warning light OFF10 to 14 V
SRRH (A41 - 8) - GND (A41 -
6, 31, A42 - 8, 17)W - W-BIG switch ON, ABS warning light OFF10 to 14 V
SRRR (A41 - 9) - GND (A41 -
6, 31, A42 - 8, 17)B-O - W-BIG switch ON, ABS warning light OFF10 to 14 V
VCM (A41 - 10) - GND (A41 -
6, 31, A42 - 8, 17)B - W-BIG switch ON4.5 to 5.5 V
PH (A41 - 11) - GND (A41 - 6,OWBIG switch ON, pressure switch (PH) ONBelow 0.9 VPH (A41 11 ) GND (A41 6,
31, A42 - 8, 17)O - W-BIG switch ON, pressure switch (PH) OFF5 to 8 V
FR+ (A41 - 14) - FR- (A41 -
13)L - PIG switch ON, slowly turn right front wheelAC generation
FL+ (A41 - 16) - FL- (A41 -
15)R - GIG switch ON, slowly turn left front wheelAC generation
SR (A41 - 19) - R1+ (A41 - 1)G-Y - PIG switch ON, ABS warning light OFF10 to 14 V
SFLH (A41 - 21) - GND (A41 -
6, 31, A42 - 8, 17)Y - W-BIG switch ON, ABS warning light OFF10 to 14 V
PMC (A41 - 22) - E2 (A41 -
12)R - WIG switch ON, stop light switch OFF0.3 to 0.7 V
E2 (A41 - 12) - GND (A41 - 6,
31, A42 - 8, 17)W - W-BIG switch OFFContinuity
MTT (A41 - 27) - GND (A41 -
6, 31, A42 - 8, 17)B-R - W-BIG switch ON (Motor relay is OFF)Below 1.5 V
MT+ (A41 - 28) - MT- (A41 -
18)L - GRIG switch ON (Motor relay is ON)Below 1.5 V
MR1 (A41 - 29) - R1+ (A41 -
1)R - PIG switch ON, hydraulic brake booster pump motor running10 to 14 V
WA (A42 - 1) - GND (A41 - 6,
31, A42 - 8, 17)R-L - W-BIG switch ON, ABS warning light OFFBelow 2.0 V

DI-524- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
717 Author
: Date
:
2004 LAND CRUISER (RM1071U) BZ (A42 - 2) - GND (A41 - 6,
31, A42 - 8, 17)
L - W-BIG switch ON, VSC buzzer sound can be heardBelow 1.5 V
D/G (A42 - 3) - GND (A41 - 6,
31, A42 - 8, 17)V-W - W-BIG switch ON10 to 14 V
P (A42 - 5) - GND (A41 - 6,
31, A42 - 8, 17)G-W - W-BIG switch ON, shift lever is in P position10 to 14 V
IG1 (A42 - 6) - GND (A41 - 6,
31, A42 - 8, 17)B-W - W-BIG switch ON10 to 14 V
NEO (A42 - 7) - GND (A41 -
6, 31, A42 - 8, 17)W - W-BEngine idlingPulse generation
STP (A42 - 10) - GND (A41 -GW WBStop light switch pushed in10 to 14 VSTP (A42 10) GND (A41
6, 31, A42 - 8, 17)G-W - W-BStop light switch released2 to 5 V
Tc (A42 - 11) - GND (A41 - 6,PB WBIG switch ON and terminals Tc-E1 of DLC1 connectedBelow 1.0 VTc (A42 11 ) GND (A41 6,
31, A42 - 8, 17)P-B - W-BIG switch ON and terminals Tc-E1 of DLC1 not connected10 to 14 V
Ts (A42 - 12) - GND (A41 - 6,WWBIG switch ON and terminals Ts-E1 of DLC1 connectedBelow 1.0 VTs (A42 12) GND (A41 6,
31, A42 - 8, 17)W - W-BIG switch ON and terminals Ts-E1 of DLC1 not connected10 to 14 V
PKB (A42 - 13) - GND (A41 -RW WBIG switch ON, parking brake switch ONBelow 1.5 VPKB (A42 13) GND (A41
6, 31, A42 - 8, 17)R-W - W-BIG switch ON, parking brake switch OFF10 to 14 V
ENG+ (A42 - 14) - ENG -
(A42 - 22)R - GIG switch ONPulse generation
RL+ (A42 - 18) - RL- (A42 -
19)R - GIG switch ON, slowly turn left rear wheelAC generation
RR+ (A42 - 20) - RR- (A42 -
21)B - WIG switch ON, slowly turn right rear wheelAC generation
TRC+ (A42 - 24) - TRC- (A42
- 16)Y - LIG switch ONPulse generation
EXI2 (A43 - 2) - GND (A41 -BL WBIG switch ON, transfer in L4 position8 to 14 VEXI2 (A43 2) GND (A41
6, 31, A42 - 8, 17)B-L - W-BIG switch ON, transfer in any position except L4Below 1.5 V
EXI (A43 - 3) - GND (A41 - 6,PB WBIG switch ON, center diff. lock switch ONBelow 2.0 VEXI (A43 3) GND (A41 6,
31, A42 - 8, 17)P-B - W-BIG switch ON, center diff. lock switch OFF10 to 14 V
VSCW (A43 - 4) - GND (A41 -LW WBIG switch ON, VSC TRAC warning light ONBelow 2.0 VVSCW (A43 4) GND (A41
6, 31, A42 - 8, 17)L-W - W-BIG switch ON, VSC TRAC warning light OFF10 to 14 V
BRL (A43 - 5) - GND (A41 - 6,YG WBIG switch ON, BRAKE warning light ON10 to 14 VBRL (A43 5) GND (A41 6,
31, A42 - 8, 17)Y-G - W-BIG switch ON, BRAKE warning light OFFBelow 2.0 V
IND (A43 - 6) - GND (A41 - 6,LB WBIG switch ON, SLIP indicator light ONBelow 2.0 VIND (A43 6) GND (A41 6,
31, A42 - 8, 17)L-B - W-BIG switch ON, SLIP indicator light OFF10 to 14 V
WT (A43 - 7) - GND (A41 - 6,LR WBIG switch ON, VSC OFF indicator light ONBelow 2.0 VWT (A43 7) GND (A41 6,
31, A42 - 8, 17)L-R - W-BIG switch ON, VSC OFF indicator light OFF10 to 14 V
VYS (A43 - 9) - GYAW (A43 -
27)B - W-RIG switch ON4.5 to 5.5 V
GL2 (A43 - 10) - GYAW (A43 -
27)Y - PIG switch ON, vehicle is placed on the horizontal surface2.0 to 3.0 V
SS1+ (A43 - 14) - SS1- (A43 -
23)W - GEngine idling, slowly turn steering wheelPulse generation
(See page DI-546)
INFR (A43 - 15) - GND (A41 -BR WBIG switch ON, ACTIVE TRAC indicator light ONBelow 1.5 VINFR (A43 15) GND (A41
6, 31, A42 - 8, 17)B-R - W-BIG switch ON, ACTIVE TRAC indicator light OFF10 to 14 V
YD (A43 - 19) - GND (A41 - 6,
31, A42 - 8, 17)L - W-BApprox. 1 sec. after IG switch ON4.5 to 5.3 V

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-525
718 Author
: Date
:
2004 LAND CRUISER (RM1071U) GL1 (A43 - 22) - GYAW (A43 -
27)
G-RIG switch ON, vehicle is placed on the horizontal surface2.0 to 3.0 V
GYAW (A43 - 27) - GND (A41
- 6, 31, A42 - 8, 17)R - W-BIG switch OFFContinuity
YAW (A43 - 28) - GYAW (A43
- 27)W - RIG switch ON, vehicle is in stationary condition2 to 3 V
SRLR (A44 - 1) - GND (A41 -
6, 31, A42 - 8, 17)R-G - W-BIG switch ON, ABS warning light OFF10 to 14 V
MR2 (A44 - 2) - R2+ (A44 - 3)Y-B - W-LIG switch ON, hydraulic brake booster pump motor running10 to 14 V
AST (A44 - 6) - GND (A41 - 6,
31, A42 - 8, 17)R-Y - W-BIG switch ON, ABS warning light OFF10 to 14 V
SRLH (A44 - 7) - GND (A41 -
6, 31, A42 - 8, 17)R-W - W-BIG switch ON, ABS warning light OFF10 to 14 V
SFRR (A44 - 8) - GND (A41 -
6, 31, A42 - 8, 17)B-W - W-BIG switch ON, ABS warning light OFF10 to 14 V
PL (A44 - 9) - GND (A41 - 6,WWBIG switch ON, pressure switch ON3 to 5 VPL (A44 9) GND (A41 6,
31, A42 - 8, 17)W - W-BIG switch ON, pressure switch OFF7 to 11 V
TRIG (A44 - 20) - GND (A41 -
6, 31, A42 - 8, 17)L - RIG switch ON, ABS warning light OFF10 to 14 V
+BO (A44 - 21) - GND (A41 -
6, 31, A42 - 8, 17)LG - LIG switch ON10 to 14 V
SFRH (A44 - 16) - GND (A41
- 6, 31, A42 - 8, 17)LG - W-BIG switch ON, ABS warning light OFF10 to 14 V
IG2 (A44 - 22) - GND (A41 -
6, 31, A42 - 8, 17)B-W - W-BIG switch ON10 to 14 V