1998 TOYOTA LAND CRUISER brake

- 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

DI-424
- DIAGNOSTICSAUTOMATIC TRANSMISSION
617 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0724 Brake Switch ºBº Circuit High
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock-up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signal to ECM. Then the ECM cancels operation of
the lock-up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P0724Stop light switch always turn on even vehicle is driver Go and
Stop 10 times. (2-trip detection logic)
Short in stop light switch signal circuit

Stop light switch

ECM
MONITOR DESCRIPTION
When the stop light switch remains ON during ºstop and goº driving, the ECM interprets this as a fault in the
stop light switch and the MIL comes on and the ECM stores the DTC. The vehicle must stop and go (3 km/h
(2 mph) to 30 km/h (19 mph)) ten times for two driving cycles in order to detect malfunction.
MONITOR STRATEGY
Related DTCsP0724Stop light switch/Range check/Rationality
Rid /C tMainStop light switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
DurationGO and STOP 10 times
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
The stop light switch remains on during GO and STOP 10 times.
GO and STOP are defined as follows;
GO: Vehicle speed30 km/h (19 mph) or more-
STOP: Vehicle speed-Less than 3 km/h (2 mph)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Brake switch statusON stuck
WIRING DIAGRAM
See page DI-278.
DIB37-02

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-433
626 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0751 Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor and direct clutch speed sensor to detect the actual
gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule
in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic
transmission (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0751The gear required by the ECM does not match the actual gear
when driving (2-trip detection logic)
Shift solenoid valve S1 is stuck open or closed

Valve body is blocked up or stuck

Automatic transmission (clutch, brake or gear etc.)
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº. According to the input shaft
revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th
gear position. When the gear position commanded by the ECM and the actual gear position are not same,
the ECM illuminates the MIL.
MONITOR STRATEGY
RltdDTCP0751Shift solenoid valve S1/OFF malfunctionRelated DTCsP0751Shift solenoid valve S1/ON malfunction
MainShift solenoid valve S1
Required sensors/ComponentsSubVehicle speed sensor, Throttle position sensor, Speed sensor (NT), Speed
sensor (NO)
Frequency of operationContinuous
OFF malfunction (A) and (B)0.4 sec.
OFF malfunction (C)Immediate
DurationON malfunction (A), (B) and
(C)0.4 sec.
ON malfunction (D)3 sec.
ON malfunction (E)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The following conditions are common to all conditions below:
Off malfunction (A), (B), (C) and ON malfunction (A), (B), (C), (D), (E)
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
DIC31-01

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-437
630 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0756 Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor and direct clutch speed sensor to detect the actual
gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule
in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic
transmission (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0756The gear required by the ECM does not match the actual gear
when driving (2-trip detection logic)
Shift solenoid valve S2 is stuck open or closed

Valve body is blocked up or stuck

Automatic transmission (clutch, brake or gear etc.)
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº. According to the input shaft
revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th
gear position). When the gear position commanded by the ECM and the actual gear position are not same,
the ECM illuminates the MIL.
MONITOR STRATEGY
RltdDTCP0756Shift solenoid valve S2/OFF malfunctionRelated DTCsP0756Shift solenoid valve S2/ON malfunction
MainShift solenoid valve S2
Required sensors/ComponentsSubVehicle speed sensor, Throttle position sensor, Speed sensor (NT), Speed
sensor (NO)
Frequency of operationContinuous
OFF malfunction (A), (B), (C)0.4 sec.
OFF malfunction (D)Immediate
DurationON malfunction (A) and (B)0.4 sec.Duration
ON malfunction (C)3 sec.
ON malfunction (D)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The following conditions are common to all conditions below:
OFF malfunction (A), (B), (C), (D) and ON malfunction (A), (B), (C), (D)
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
DIC32-01

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-441
634 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0771 Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor and direct clutch speed sensor to detect the actual
gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule
in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic
transmission (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0771The gear required by the ECM does not match the actual gear
when driving (2-trip detection logic)

Shift solenoid valve SR is stuck open or closed

Shift solenoid valve SL1 is stuck open or closed

Valve body is blocked up or stuck

Automatic transmission (clutch, brake or gear etc.)
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº. According to the input shaft
revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th
gear position). When the gear position commanded by the ECM and the actual gear position are not same,
the ECM illuminates the MIL and stores the DTC.
MONITOR STRATEGY
Related DTCsP0771Shift solenoid valve SR/Rationality check
Rid /C tMainShift solenoid valve SRRequired sensors/ComponentsSubSpeed sensor (NT), Speed sensor (NO), Crankshaft position sensor (NE)
Frequency of operationContinuous
OFF malfunction (A)0.4 sec.
DurationOFF malfunction (B) and (C)ImmediateDuration
ON malfunction0.15 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The following items are common to all condition below: OFF malfunction (A), (B), (C) and ON malfunction
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
DIB3A-02