TOYOTA LAND CRUISER 1998 Factory Repair Manual

C42919C00038
GND 5V1ms
C00035
GND 1V 2ms
C13480C00036
GND 2V 20ms
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-395
588 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Pulse generation 4
Reference:
ItemCondition
TerminalSL1+ - SL1-
Tool setting5V/DIV, 1ms/DIV
Vehicle conditionEngine idle speed
Pulse generation 5
Reference:
ItemCondition
TerminalNT+ - NT-
Tool setting1V/DIV, 2ms/DIV
Vehicle conditionEngine idle speed
Pulse generation 6
Reference:
ItemCondition
TerminalSP2+ - SP2-
Tool setting2V/DIV, 20ms/DIV
Vehicle conditionVehicle speed 20 km/h (12 mph)

I25774
C18
Combination Switch
45
CRUISE CANCEL SET/COASTRES/ACC
BRLL L294
55
BR SB BRBR II3Id3
IH2 IX224
E8
1
E7 E1CCS
ECECM DI-998
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1191 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Main Switch Circuit (Cruise Control Switch)
CIRCUIT DESCRIPTION
This circuit carries the -/SET, +/RESUME and Cancel signals (each voltage) to the ECM.
WIRING DIAGRAM
DIB6C-01

I25004
CCS
I24843
+/RES
ON-
OFF
-/SET
CANCEL
45
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-999
1192 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check voltage between terminal CCS of ECM connector and body ground.
PREPARATION:
(a) Remove the ECM with connector still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal CCS of ECM connector and
body ground, when each of the -/SET, +RES and CANCEL is
turned ON.
OK:
Switch PositionVoltage
Neutral9 - 14 V
+/RES2.1 - 4 V
-/SET4 - 7.1 V
CANCEL6 - 10.1 V
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI-991).
NG
2 Check main switch continuity.
PREPARATION:
(a) Remove steering wheel center pad (See page SR-9).
(b) Disconnect the control switch connector.
CHECK:
(a) Measure resistance between terminals 4 and 5 of cruise
control switch connector when control switch is operated.
Switch positionResistance (W)
Neutral8(No continuity)
+/RES210 - 270
-/SET560 - 700
CANCEL1380 - 1700
(b) Check continuity between terminals 4 and 5 of control
switch connector when main switch is held on and off.
OK:
Switch positionTester connectionSpecified condition
OFF4 - 5No continuity
ON4 - 5Continuity

DI-1000
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1193 Author
: Date
:
2004 LAND CRUISER (RM1071U)
NG Replace control switch.
OK
3 Check harness and connector between ECM and cruise control switch, cruise
control switch and body ground (See page IN-26).
NG Repair or replace harness or connector.
OK
4 Check cruise control indicator light (See combination meter.)
NG Replace combination meter.
OK
Check and replace ECM (See page IN-36).

DI3CI-14
DI-992
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1185 Author
: Date
:
2004 LAND CRUISER (RM1071U)
CIRCUIT INSPECTION
DTC P0500/21 Vehicle Speed Sensor ºAº
DTC P0503/23 Vehicle Speed Sensor ºAº Intermittent/Errat-
ic/High
CIRCUIT DESCRIPTION
See page .DI-274
DTC No.DTC Detection ConditionTrouble Area
P0500/21
P0503/23
No vehicle speed sensor signal to ECM under following condi-
tions (a) and (b): (2 trip detection logic)
(a) Park/neutral position switch is OFF
(b) Vehicle is being driven
Combination meter

Open or short in vehicle speed sensor circuit

Vehicle speed sensor

ECM
WIRING DIAGRAM
See page .DI-274
INSPECTION PROCEDURE
See page .DI-274

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-993
1186 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0571/52 Brake Switch ºAº Circuit
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to the ECM. When the ECM receives
this signal, it cancels the cruise control.
A fail-safe function is provided so that the cancel functions normally, even if there is a malfunction in the stop
light signal circuit.
The cancel condition is that battery positive voltage is supplied to terminal STP.
When the brake is on, battery positive voltage is normally applied through the STOP fuse and stop light
switch to terminal STP of the ECM, and the ECM turns the cruise control OFF.
If the harness connected to terminal STP has an open circuit, terminal STP will have battery positive voltage
and the cruise control will be turned OFF.
DTC No.Detection ItemTrouble Area
P0571/52Stop light switch circuit.

Stop light switch

Harness or connector between ECM and stop light switch
circuit

ECM
DIB6A-01

I25773
S5 Stop Light Switch Cowl Side J/B LH Cowl Side J/B RHEngine Control Model
Cowl Side J/B RHCenter J/B
S5 Stop Light Switch
Engine Room J/B
Fusible Link BlockI18 Ignition Switch J4
J/C 21
G-W
G-R
W-R2D35
2D 31
2A10STOP2E 26
2C1
2E41G-WG-W 3M4
3M5
E8 19
STP
ST1- E8 12
R-G 4C9
4E15 4E13
4D9
3 4
B-R R-G 3E4
3E8
B-R B-R A
A
B-R
W-R 7 6
IG2 AM2
1C1
1B9 AM2
B-G
F161
F152J/B No. 2
Battery B-G
IGN
ALT
MAIN DI-994
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1187 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-995
1188 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
In case of using the hand-held tester, start the inspection from step 1 and in case of not using the hand-held
tester, start from step 2.
1 Check stop light switch using hand-held tester.
PREPARATION:
Connect the hand-held tester to the DLC3.
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main SW ON.
CHECK:
Select the item ºSTOP LIGHT SWº in the DATA LIST and read its valve displayed.
OK:
Brake pedal depressed: ON
Brake pedal released: OFF
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI-991).
NG
2 Check operation of stop light.
CHECK:
Check that stop light comes on when brake pedal is depressed, and turns off when brake pedal is released.
NG Check stop light system (See page BE-49).
OK

I25004
STP
STI-
DI-996
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1189 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check voltage between terminal STP/STI- of ECM connector and body ground.
PREPARATION:
(a) Remove the ECM with connectors still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal STP/STI- of ECM connec-
tor and body ground when the brake pedal is depressed and re-
leased.
OK:
Depressed10 - 14 V
ReleasedBelow 1 V
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI-991).
NG
4 Check wire harness and connector between terminal STP of ECM and stop light
switch, and terminal STI- of ECM and stop light switch (See page IN-36).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN-36
).

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-997
1190 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0607/54 Control Module Performance
CIRCUIT INSPECTION
This DTC expresses the internal abnormalities of ECM.
DTC No.Detection ItemTrouble Area
P0607/54
Cruise control input signal abnormal.

Stop light switch input signal abnormal.
ECM
INSPECTION PROCEDURE
Check and replace ECM (See page IN-36).
DIB6B-01