2001 TOYOTA SEQUOIA DLC3 Ts

A08841
Hand±held Tester
DLC3
DIDEZ±01
A04550
DLC3 1 2345678
9
10 11 12 1314 15 16
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1543
1737 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSIS SYSTEM
1. DESCRIPTION
The ECM controls the cruise control system of the vehicle. The
data and DTCs relating to the cruise control system can be read
from the DLC3 of the vehicle. If no DTCs are output when
checking for DTCs, there may be a problem with the combina-
tion meter or the multiplex communication system.
Use the hand±held tester or SST to check and solve the prob-
lem.
SST 09843±18040
2. CHECK THE DLC3
The vehicle's ECM uses ISO 9141±2 for communication. The
terminal arrangement of the DLC3 complies with SAE J1962
and matches the ISO 9141±2 format.
Symbols (Terminals No.)Terminal DescriptionConditionSpecified Condition
SIL(7) ± SG(5)Bus º+º lineDuring transmissionPulse generation
CG(4) ± Body groundChassis groundAlwaysBelow 1 W
SG(5) ± Body groundSignal groundAlwaysBelow 1 W
BAT(16) ± Body groundBattery positiveAlways11 to 14 V
HINT:
If the display shows ºUNABLE TO CONNECT TO VEHICLEº af-
ter connecting the hand±held tester to the DLC3, turning the
ignition switch to the ON position and operating the tester, there
is a problem on either the vehicle side or the tool side.

If communication is normal when the tool is connected to
another vehicle, inspect the DLC3 on the original vehicle.

If communication is still impossible 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.

DIDF0±01
A04550
TC CG
1 2345678
9
10 11 12 1314 15 16
I11929
CRUISE Main
Indicator Light
I28693
Normal System Code:
ON
OFF
Code 52
Code 21 0.25 sec.
0.25 sec.
ON
OFFDiagnostic Trouble Code:
4.5 sec. 2.5 sec. 1.5 sec. 0.5 sec.
0.5 sec.
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1545
1739 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
1. DTC CHECK (USING SST CHECK WIRE)
(a) Using SST check wire, connect terminals TC and CG
of
the DLC3.
SST 09843±18040
(b) Turn the ignition switch to the ON position.
(c) Read and record DTCs from the CRUISE main indicator
light on the combination meter. As examples, refer to the
chart below for the blinking patterns of the normal system
code, and diagnostic trouble codes 21 and 52.
(d) Refer to the Diagnostic Trouble Code Chart (see page
DI±1549) for DTC information.
2. DTC CLEAR (USING SST CHECK WIRE)
Remove the EFI No.1 and ETCS fuses from the engine room
J/B for more than 60 seconds, or disconnect the battery termi-
nal for more than 60 seconds.

A08841DLC3
Hand±held Tester
DI±1546
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1740 Author: Date:
2005 SEQUOIA (RM1146U)
3. DTC CHECK (USING HAND±HELD TESTER)
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Read the DTCs on the tester screen.
4. DTC CLEAR (USING HAND±HELD TESTER)
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Clear the DTCs following the prompts on the tester
screen.

DIDF2±01
A08841DLC3
Hand±held Tester
DI±1548
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1742 Author: Date:
2005 SEQUOIA (RM1146U)
DATA LIST / ACTIVE TEST
DATA LIST
HINT:
According to the DATA LIST displayed by the the hand±held
tester, you can read the values of the switches, the sensors and
so on without parts removal. Reading the DATA LIST as a first
step in troubleshooting is one of the methods to shorten labor
time.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on the tester, read the ºDATA
LISTº.
CCS (ECM):
ItemMeasurement Item
/Display (Range)Normal ConditionDiagnostic Note
VEHICLE SPDVehicle speed/min.: 0 km/h (0
mph), max.: 255 km/h (158 mph)Actual vehicle speed±
MEMORY SPD
Cruise control memorized speed
/min.: 36 km/h (22.5 mph), max.:
200 km/h (125 mph)
Actual stored vehicle speed±
THROTTLERequired throttle opening angle
/min.: 0
, max.: 125
Actual required throttle opening
angle±
CRUISE CONTROLCruise control system active
condition/ON or OFFON: Cruise control activated
OFF: Cruise control inactivated±
MAIN SW (MAIN)Main SW signal (Main CPU)
/ON or OFFON: Main SW ON (Pushed on)
OFF: Main SW OFF (Pushed off)±
MAIN SW (SUB)Main SW signal (Sub CPU)
/ON or OFFON: Main SW ON (Pushed on)
OFF: Main SW OFF (Pushed off)±
CCS INDICATORCruise indicator signal (Main CPU)
/ON or OFFON: ºCRUISE main indicatorº ON
OFF: ºCRUISE main indicatorº
OFF
±
CCS INDICATOR SCruise indicator signal (Sub CPU)
/ON or OFFON: ºCRUISE main indicatorº ON
OFF: ºCRUISE main indicatorº
OFF
±
CANCEL SWCANCEL SW signal/ON or OFFON: CANCEL SW ON
OFF: CANCEL SW OFF±
SET/COAST SW±/SET SW signal/
ON or OFFON: ±/SET SW ON
OFF: ±SET OFF±
RES/ACC SW+/RES SW signal/ON or OFFON: +/RES SW ON
OFF: +/RES SW OFF±
STP LIGHT SW2 MStop light SW signal (Main CPU)
/ON or OFFON: Brake pedal depressed
OFF: Brake pedal released±
STP LIGHT SW2 SStop light SW signal (Sub CPU)
/ON or OFFON: Brake pedal depressed
OFF: Brake pedal released±
STP LIGHT SW1 SStop light SW signal (Sub CPU)
/ON or OFFON: Brake pedal depressed
OFF: Brake pedal released±
SHIFT D POSPNP SW signal (D position)
/ON or OFFON: Shift position D
OFF: Any shift position except D±

DI3CG±10
I28396
DLC3
Instrument Panel J/B
Ignition SwitchECM Cruise Control Switch
Stop Light Switch

STOP Fuse

IGN1 Fuse

AM1 Fuse

GAUGE FuseCombination Meter

CRUISE Main Indicator Light
Spiral Cable Sub±assy
DI±1550
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1744 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LOCATION

± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1553
1747 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from step 1 and when not using the hand±held tester,
start from step 2.
1 Read value on hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position, and turn the hand±held tester main switch on.
(c) Select the item ºSTP LIGHT SW2 Mº, ºSTP LIGHT SW2 Sº and ºSTP LIGHT SW1 Sº in the DATA LIST,
and read its value displayed on the hand±held tester.
CHECK:
Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal
is released.
CCS (ECM):
ItemMeasurement Item
/Display (Range)Normal ConditionDiagnostic Note
STP LIGHT SW2 MStop light SW signal (Main CPU)
/ON or OFFON: Brake pedal depressed
OFF: Brake pedal released±
STP LIGHT SW2 SStop light SW signal (Sub CPU)
/ON or OFFON: Brake pedal depressed
OFF: Brake pedal released±
STP LIGHT SW1 SStop light SW signal (Sub CPU)
/ON or OFFON: Brake pedal depressed
OFF: Brake pedal released±
OK:
When the brake pedal is operated, the normal conditions listed above are shown on the display.
RESULT:
NGA
OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE)B
OK (When troubleshooting according to the DTC chart)C
B Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1541).
C Replace ECM (See page IN±35).
A

DI±1558
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1752 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from 1 and when not using the hand±held tester, start
from step 2.
1 Read value on hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the hand±held tester main switch on.
(c) Select the item below in the ºDATA LISTº, and read the display on the hand±held tester.
CHECK:
Check that the CRUISE main indicator light comes on when the cruise main switch is ON, and goes off when
the cruise main switch is OFF.
CCS (ECM):
ItemMeasurement Item
/Display (Range)Normal ConditionDiagnostic Note
CCS INDICATORCruise indicator signal (Main CPU)
/ON or OFFON: ºCRUISE main indicatorº ON
OFF: ºCRUISE main indicatorº
OFF
±
CCS INDICATOR SCruise indicator signal (Sub CPU)
/ON or OFFON: ºCRUISE main indicatorº ON
OFF: ºCRUISE main indicatorº
OFF
±
OK:
When the cruise control main switch is operated, the normal conditions listed above are shown
on the display.
NG Go to step 2.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1541).

I24838
ON±OFF
SET/COAST
RES/ACC
CANCEL
DI±1562
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1756 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from step 1 and when not using the hand±held tester,
start from step 2.
1 Read value on hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) According to the display on the tester, read the ºDATA
LISTº.
CCS (ECM):
ItemMeasurement Item
/Display (Range)Normal ConditionDiagnostic Note
MAIN SW (MAIN)Main SW signal (Main CPU)
/ON or OFFON: Main SW ON (Pushed on)
OFF: Main SW OFF (Pushed off)±
MAIN SW (SUB)Main SW signal (Sub CPU)
/ON or OFFON: Main SW ON (Pushed on)
OFF: Main SW OFF (Pushed off)±
CANCEL SWCANCEL SW signal
/ON or OFFON: CANCEL SW ON
OFF: CANCEL SW OFF±
SET/COAST SWSET/COAST SW signal
/ON or OFFON: SET/COAST SW ON
OFF: SET/COAST OFF±
RES/ACC SWRES/ACC SW signal
/ON or OFFON: RES/ACC SW ON
OFF: RES/ACC SW OFF±
OK:
When the cruise control main switch is operated, the normal conditions listed above are shown
on the display.
RESULT:
OKA
NG (All items are defective.)B
NG (One to four items are defective.)C
B Go to step 2.
C Replace cruise control main switch.
A