Page 1065 of 3115
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 drivenCombination 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
Page 1066 of 3115

- 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
Page 1067 of 3115
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
Page 1068 of 3115
- 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
Page 1069 of 3115
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
).
Page 1070 of 3115
- 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
P0607/54Cruise control input signal abnormal.
Stop light switch input signal abnormal.ECM
INSPECTION PROCEDURE
Check and replace ECM (See page IN-36).
DIB6B-01
Page 1071 of 3115
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-1001
1194 Author: Date:
2004 LAND CRUISER (RM1071U)
CRUISE MAIN Indicator Light Circuit
CIRCUIT DESCRIPTION
When the cruise control main switch is turned ON, CRUISE MAIN indicator light lights up.
INSPECTION PROCEDURE
1 Perform Active Test of hand-held tester.
PREPARATION:
Connect the hand-held tester to the DLC3.
CHECK:
Check the cruise indicator of the combination meter using Active Test.
OK:
DescriptionTester displayCheck condition
CRUISE Indicator lightCRUISE INDICON/OFF
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI-991).
NG
Check and replace combination meter.
(See page IN-36).
DIB6D-01
Page 1072 of 3115

DI26S-20
CRUISE CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date of VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Condition of
Problem Occurrence
Date of Problem
Frequency
Occurrence
Problem Occurs?
Vehicle Speed when
Problem Occurred / /
Continuous Intermittent ( Times a day)
km
Mile Brought in
Auto cancel
occurs Driving condition
City driving Freeway Up hill Down hill
After cancel occurred, did the driver activate cruise control
again?
Yes No
Cancel does not
occur With brake ON
Except D position shift
When control SW turns to CANCEL position
Cruise control
malfunction Slip to acceleration side
Slip to deceleration side
Hunting occurs
O/D cut off does not occur
O/D does not return
Switch
malfunction SET ACCEL COAST RESUME CANCEL
Remains ON Does not light up Blinks Symptoms
DTC Check1st Time2nd Time
Normal Code Malfunction Code (Code )
Normal Code Malfunction Code (Code ) Cruise main
indicator light DI-980
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1173 Author: Date:
2004 LAND CRUISER (RM1071U)
CUSTOMER PROBLEM ANALYSIS CHECK