Page 1073 of 3115
DI26U-32
DI-988
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1181 Author: Date:
2004 LAND CRUISER (RM1071U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below and proceed to the appropriate page.
DTC No.
(See Page)Circuit InspectionTrouble Area
P0500/21
(DI-992)Vehicle Speed Sensor ºAºCombination meter
Open or short in vehicle speed sensor circuit
P0503/23
(DI-992)Vehicle Speed Sensor ºAº Intermittent/Erratic/High
Oen or short in vehicle s eed sensor circuit
Vehicle speed sensor
ECM
P0571/52
(DI-993)Brake Switch ºAº Circuit
Short in stop light switch circuit
Stop light switch
ECM
P0607/54
(DI-997)Control Module PerformanceECM
Page 1074 of 3115
DI26R-35
Customer Problem Analysis
Check and Clear DTC (Pre check)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
DTC CheckNormal code
DTC Chart
Problem Symptom Table
Circuit InspectionInput Signal Check
Parts Inspection
Identification of Problem
Repair
Confirmation Test
EndItems inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations. 1
2
34
5
6
7
89
10
Step 2, 5, 8, 10: Diagnostic steps permitting the use
of the hand-held tester. P. DI-980
P. DI-981
P. DI-981
P. DI-988
P. IN-26
P. DI-991
P. DI-992 - DI-1001
OKNG
Symptom occurs
Malfunction code
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-979
1172 Author: Date:
2004 LAND CRUISER (RM1071U)
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.
Page 1075 of 3115
DI3CG-08
I25789
Cruise main SWECM
Stop Light SW
Engine Room R/B
AM2 Fuse
Fusible Link Block
Cowl Side J/B LH
STOP FuseCombination Meter Assy
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-989
1182 Author: Date:
2004 LAND CRUISER (RM1071U)
PARTS LOCATION
Page 1076 of 3115

DIB69-01
I24672
Hand-held tester
DLC3
A04550
DLC3
10 11 12 13 14 15 16 12345678
9
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-981
1174 Author: Date:
2004 LAND CRUISER (RM1071U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Description
ECM controls the function of cruise control on this vehicle.
Data of the cruise control or DTC can be read from DLC3
of the vehicle. When a trouble occurs on cruise control,
Check CRUISE MAIN indicator does not light up but DTC
inspection is performed.
Therefore when there seems to be a trouble on cruise
control, use hand-held tester or SST to check and trou-
bleshoot it.
(b) Check the DLC3.
The vehicle's ECM uses ISO 9141-2 for communication.
The terminal arrangement of DLC3 complies with SAE
J1962 and matches the ISO 9141-2 format.
Terminal No.Connection/Specified ConditionCondition
4Chassis Ground e Body Ground/1 or lessAlways
13TC e Body Ground/9 - 14 VAlways
HINT:
If your display shows ºUNABLE TO CONNECT TO VEHICLEº
when you have connected the cable of the hand-held tester to
DLC3, turned the ignition switch ON and operated the hand-
held tester, there is a problem on the vehicle side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool's instruction manual.
Page 1077 of 3115

I24683
ºCRUISE
MAINº
Indicator
light
BE4034
Indicator Light
1.5 sec.0.5 sec.
ON
OFF
A04550
10 11 12 13 14 15 16 12345678
9
TCCG
I03610
Normal Code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF
2.5 sec. 0.5 sec.1.5 sec.
Malfunction codes 52
Code 52
0.5 sec.
DI-982
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1175 Author: Date:
2004 LAND CRUISER (RM1071U)
(c) Check the indicator.
(1) Turn the ignition switch to ON.
(2) Check that the CRUISE MAIN indicator light comes
on when the cruise control main switch is turned
ON, and that the indicator light goes off when the
main switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page BE-2) for the combination meter
section.
(d) Check the DTC.
HINT:
If a malfunction occurs in the speed sensor or stop light switch,
etc. during cruise control driving, the ECM actuates AUTO
CANCEL of the cruise control and turns ON and OFF the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stored in memory as
a diagnostic trouble code.
(e) Output DTC using diagnosis check wire.
(1) Turn the ignition switch ON.
(2) Using SST, connect terminals Tc and CG of DLC3.
SST 09843-18040
(3) Read the DTC on the CRUISE MAIN indicator light.
HINT:
If the DTC is not output, inspect the diagnosis circuit.
As an example, the blinking patterns for codes; normal 52
are shown in the illustration.
Page 1078 of 3115

I24672
Hand-held tester
DLC3
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-983
1176 Author: Date:
2004 LAND CRUISER (RM1071U)
2. USING HAND-HELD TESTER
(a) Hook up the hand-held tester to the DLC3.
(b) Monitor the ECU data by following the prompts on the tes-
ter screen.
HINT:
Hand-held tester has a ºSnapshotº function which records the
monitored data.
Please refer to the hand-held tester operator's manual for fur-
ther details.
3. DTC CLEARANCE
(a) The following actions will erase the DTCs and freeze
frame data.
(1) Operating the hand-held tester to erase the codes
(See the hand-held tester instruction book for oper-
ating instructions.).
(2) Disconnecting the battery terminals or EFI fuse.
(b) After completing repairs, the DTC retained in memory can
be cleared by removing the EFI fuse for 10 seconds or
more with the ignition switch off.
(c) Check that the normal code is displayed after connecting
the fuse.
4. DATA LIST
HINT:
According to the DATA LIST displayed by the hand-held tester,
you can read the value of the switch, sensor, actuator and so
on without parts removal. Reading the DATA LIST as a first step
of troubleshooting is one of the method to shorten the labor
time.
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on tester, read the ºDATA LISTº.
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
VEHICLE SPD
Vehicle speed/
min.: 0 km/h (0 mph)max.: 255
km/h (158 mph)
Actual vehicle speed-
MEMORY SPD
Vehicle speed/
min.: 0 km/h (0 mph)max.: 255
km/h (158 mph)
Actual vehicle speed-
THROTTLE
Throttle operating angle/
min.: 0 km/h (0 mph)max.: 125
km/h ( mph)
Actual vehicle speed-
CRUISE CONTROLCruise controlON: Cruise control is SET
OFF: Cruise control is UNSET-
MAIN SW (MAIN)Main switch
(Main CPU)
ON: Main switch (Main CPU) is
SET
OFF: Main switch (Main CPU) is
UNSET
-
Page 1079 of 3115

I24838
(1)
(3) DI-984
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1177 Author: Date:
2004 LAND CRUISER (RM1071U)MAIN SW (SUB)
Main switch
(Sub CPU)
ON: Main switch (Sub CPU) is
SET
OFF: Main switch (Sub CPU) is
UNSET
-
CCS READY MSwitch ready
(Main CPU)
ON: Switch ready (Main CPU) is
SET
OFF: Switch ready (Main CPU) is
UNSET
-
CCS READY SSwitch ready
(Sub CPU)
ON: Switch ready (Sub CPU) is
SET
OFF: Switch ready (Sub CPU) is
UNSET
-
CCS INDICATOR MSwitch indicator
(Main CPU)
ON: Switch indicator (Main CPU)
is ON
OFF: Switch indicator (Main CPU)
is OFF
-
CCS INDICATOR SSwitch indicator
(Sub CPU)
ON: Switch indicator (Sub CPU) is
ON
OFF: Switch indicator (Sub CPU)
is OFF
-
CANCEL SWCANCEL switchON: CANCEL switch is SET
OFF: CANCEL switch is UNSET-
SET/COAST SWSET/COAST switch
ON: SET/COAST switch is SET
OFF: SET/COAST switch is UN-
SET
-
RES/ACC SWRES/ACC switchON: RES/ACC switch is SET
OFF: RES/ACC switch is UNSET-
STP LIGHT SW2-MStop light SW signal (Main CPU)ON: Brake pedal depressed
OFF: Brake pedal released-
STP LIGHT SW2-SStop light SW signal (Sub CPU)ON: Brake pedal depressed
OFF: Brake pedal released-
STP LIGHT SW1-MStop light SW signal (Sub CPU)ON: Brake pedal depressed
OFF: Brake pedal released-
SHIFT D POSShift D positionON: Shift is D position
OFF: Shift is except D position-
5. PROBLEM SYMPTOM CONFIRMATION (ROAD TEST)
(a) Inspect the SET switch.
(1) Push the main switch ON.
(2) Drive at a desired speed [40 km/h (25 mph) or high-
er].
(3) Press the control switch to the -/SET.
(4) After releasing the switch, check that the vehicle
cruises at the desired speed.
Page 1080 of 3115

I24838
(1) (3)
I24838
(1)
(3)
I24838
(1)
(3)
- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-985
1178 Author: Date:
2004 LAND CRUISER (RM1071U)
(b) Inspect the ACCEL switch.
(1) Push the main switch button to ON.
(2) Drive at a desired speed [40 km/h (25 mph) or high-
er].
(3) Check that the vehicle speed increases while the
control switch is pulled up to +/RES, and that the ve-
hicle cruises at the set speed when the switch is re-
leased.
(4) Momentarily press the control switch upward to the
+/RES and then immediately release it. Check that
the vehicle speed increases by about 1.5 km/h
(Tap-up function).
(c) Inspect the COAST switch.
(1) Push the main switch button to ON.
(2) Drive at a desired speed [40 km/h (25 mph) or high-
er].
(3) Check that the vehicle speed decreases while the
control switch is push down to -/SET, and the ve-
hicle cruises at the set speed when the switch is re-
leased.
(4) Momentarily press the control switch downward to
-/SET , and then immediately release it. Check that
the vehicle speed decreases by about 1.5 km/h
(Tap-down function).
(d) Inspect the CANCEL switch.
(1) Push the main button to ON.
(2) Drive at a desired speed [40 km/h (25 mph) or high-
er].
(3) When operating one of the followings, check that
the cruise control system is cancelled and that the
normal driving mode is reset.
Depress the brake pedal
Shift to except D position
Push the main switch button to OFF