1998 TOYOTA LAND CRUISER warning light

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

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-483
676 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P2740 Transmission Fluid Temperature Sensor ºBº
Circuit
DTC P2742 Transmission Fluid Temperature Sensor ºBº
Circuit Low Input
DTC P2743 Transmission Fluid Temperature Sensor ºBº
Circuit High Input
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into a resistance value which is input in to the ECM.
ATF temperature sensor No.2 is on the transmission and just before the oil cooler inlet pipeline.
If ECM detects the abnormally high temperature of ATF by this sensor, it draws driver's attention by illuminat-
ing the warning lamp.
HINT:

The temperature of ATF easily raises when towing, climbing hills and in traffic, etc.

If the ATF temperature sensor No.2 shorts, the signal that indicates the ATF temperature is 150C
(302F) or higher is input in ECM.
Vehicle conditions when sensor is in normal and when the vehicle is in short are indicated in the table
below.
ATF temperature No.2 Sensor
StateDetection ConditionSymptomRecovery Condition
Sensor is normal

AT fluid temp. more than 150C
(302F).
AT Oil Temp. warning light re-
mains on
AT fluid temp. less than 135C
(275F). *1
Sensor is normal
AT fluid temp. more than 130C
(266F).
Shift point too high.
AT fluid temp. less than 110C
(230F).
Sensor is in short
Any conditions.

AT Oil Temp. warning light re-
mains on

Shift point too high.

Symptoms still occur
HINT:
*1: When AT fluid temperature is in normal range, it decreases to less than 135C within 5 minutes with the
shift lever in P or N position in a idling state.
DTC No.DTC Detecting ConditionTrouble Area
P2740
(a) and (b) is detected momentary within 0.5 sec. when neither
P2742 or P2743 is not detected (1-trip detection logic)
(a) ATF temperature sensor resistance is less than 79 W.
(b) ATF temperature sensor resistance is more than 156 kW.
HINT:
Wthin 0.5 sec. the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor No. 2 circuit

ATF temperature sensor No. 2
P2742ATF temperature sensor resistance is less than 79 W. for 0.5
sec. or more (1-trip detection logic)
ECM
P2743
DTC is detected for 0.5 sec. or more (1-trip detection logic)
ATF temperature sensor resistance is more than 156 kW. after
started engine for 15 minutes or more
DIC33-01

DI3BR-05
D13102
Combination Meter
DLC3 Stop Light SwitchECM
Transmission Control
Switch
(2 e L Position)
Pattern Select Switch
Park/Neutral Position Switch
Speed Sensor SP2
Shift Solenoid Valve S1
Shift Solenoid Valve SR
Shift Solenoid Valve SLU
Shift Solenoid Valve SL2 ATF Temperature
Sensor No. 2Speed Sensor NT
Indicator Switch
(Transfer Neutral Position Switch)
Indicator Switch
(Transfer L4 Position Switch)
Transmission Control
Switch
(D e 4 Position)
MIL

ECT PWR Indicator Light

2nd STRT Indicator Light

A/T. P. Indicator Light
Shift Solenoid
Valve SL1
Shift Solenoid
Valve SLT
ATF Temperature
Sensor No. 1
Shift Solenoid Valve S2

AT Oil Temp warning Light DI-392
- DIAGNOSTICSAUTOMATIC TRANSMISSION
585 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PARTS LOCATION

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-397
590 Author
: Date
:
2004 LAND CRUISER (RM1071U) Shift point too high or too low
1. Shift solenoid valve (SLT) circuit *1
2. Speed sensor NT circuit *1
3. Speed sensor SP2 circuit *1
4. Throttle position sensor circuit *1
5. ATF temperature sensor circuit *1
6. Pattern select switch circuit (PWR mode switch)
7. Transfer L4 position switch circuit *1
8. ECM
DI-479
DI-418
DI-421
DI-36
DI-410
DI-495
DI-472
IN-36
Up-shift to 5th from 4th while shift lever is 4 position1. Transmission control switch circuit (D - 4) *1
2. ECM
DI-402
IN-36
Up-shift to 5th from 4th while engine is cold1. Engine coolant temp. sensor circuit *1
2. ECM
DI-36
IN-36
Up-shift to 4th from 3rd while shift lever is 3 position1. Park/neutral position switch circuit *1
2. ECM
DI-402
IN-36
Up-shift to 3rd from 2nd while shift lever is 2 position1. Park/neutral position switch circuit *1
2. ECM
DI-402
IN-36
Up-shift to 2nd from 1st while shift lever is L position1. Transmission control switch circuit (2 - L) *1
2. ECM
DI-402
IN-36
Harsh engagement (N " D)
1. Speed sensor NT circuit *1
2. Shift solenoid valve (SL1) circuit *1
3. Shift solenoid valve (SLT) circuit *1
4. ECM
DI-418
DI-426
DI-479
IN-36
Harsh engagement (Lock-up)
1. Speed sensor NT circuit *1
2. Speed sensor SP2 circuit *1
3. Shift solenoid valve (SLU) circuit *1
4. ECM
DI-418
DI-421
DI-491
IN-36
Harsh engagement (Any driving position)ECMIN-36
Poor acceleration1. ATF temperature sensor No.2 circuit *1
2. ECM
DI-483
IN-36
No engine brakingECMIN-36
No kick-downECMIN-36
Engine stalls when starting off or stoppingECMIN-36
No pattern select (PWR)1. Pattern select switch circuit (PWR mode switch)
2. ECMDI-495
IN-36
No 2nd start
1. Pattern select switch circuit (2nd start switch)
2. Transmission control switch circuit (2 - L) *1
3. ECM
DI-497
DI-402
IN-36
AT Oil Temp. warning light remains on*1Lock-up at 3rd gear1. ATF temperature sensor No.2 circuit *1
2 ECM
DI-483
IN 36Shift point too high2. ECMIN-36
A/T.P. indicator light does not light up
1. A/T.P. indicator light circuit
2. Combination meter circuit
3. ECMDI-500
BE-58
IN-36

H21247
Airbag Sensor
Assembly
C26IG2 5
B-R
3F3 IGN
3E4Cowl Side J/B RH
AB-R
AJ4
J/C
B-R
6 7
W-RCowl Side J/B LH
2E
2A 41 10
BatteryF15
FL Block
MAINB-G Engine Room J/B
1C 1B1 9AM2
W-R I18
Ignition SW
2 AM2 IG2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-923
111 6 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the airbag sensor assembly in
case the source voltage drops.
When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is differ from the other circuits in that when the SRS
warning light remains on and the DTC shows a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and when the source voltage returns
to normal, the SRS warning light automatically goes off.
DTC No.Diagnosis
(Normal)Source voltage drop
WIRING DIAGRAM
DI8FC-09

H01249
ON
DI-926
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
111 9 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Does SRS warning light turn off?
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Connect the steering wheel pad connector.
(c) Connect the front passenger airbag assembly connector.
(d) w/ Side airbag:
Connect the side airbag assembly connectors.
(e) Connect the seat belt pretensioner connectors.
(f) Connect the airbag sensor assembly connectors.
(g) Connect the front airbag sensor connectors.
(h) w/ Side airbag:
Connect the side and curtain shield airbag sensor assem-
bly connectors.
(i) w/ Side airbag:
Connect the curtain shield airbag assembly connectors.
(j) w/ Side airbag:
Connect the curtain shield airbag sensor assembly con-
nectors.
(k) Connect the seat position sensor assembly connector.
(l) Connect the front seat inner belt LH connector.
CHECK:
(a) Turn the ignition switch to ON.
(b) Operate electric system (defogger, wiper, headlight, heat-
er blower, etc.) and check that SRS warning light goes off.
NO Check for DTCs. If a DTC is output, perform trou-
bleshooting for the DTC. If a normal code is out-
put, replace airbag sensor assembly.
YES
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.