Page 1745 of 4323

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.
Page 1746 of 4323
I11929
CRUISE Main
Indicator Light
BE4034
Indicator Light
1.5 secs.0.5 secs.
ON
OFF DI±1544
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1738 Author: Date:
2005 SEQUOIA (RM1146U)
3. CHECK THE INDICATOR
(a) Turn the ignition switch to the ON position.
(b) Check that the CRUISE main indicator light comes on
when the cruise control main switch ON±OFF button is
pushed on, and that the indicator light goes off when the
ON±OFF button is pushed off.
HINT:
If there is a problem with the indicator, inspect the cruise main
indicator light circuit (see page DI±1557).
HINT:
If a malfunction occurs in the vehicle speed sensors, stop lamp
switch assy, or other related parts during cruise control driving,
the ECM will actuate AUTO CANCEL of the cruise control. The
CRUISE main indicator light will then start to blink, informing the
driver of the malfunction. At the same time, data concerning the
malfunction is stored as a diagnostic trouble code (DTC).
Page 1747 of 4323

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.
Page 1748 of 4323
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.
Page 1749 of 4323
DIDF1±01
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1547
1741 Author: Date:
2005 SEQUOIA (RM1146U)
FAIL±SAFE CHART
If the following condition is detected while the cruise control is in operation, the system will clear
the stored vehicle speed in the ECM and cancel the cruise control operation.
Vehicle ConditionAuto Cancel ConditionRe±operation Condition
The CRUISE main indicator light blinks.
There is an open or short in the stop light switch
circuit.
There is a problem with the vehicle speed sig-
nal.
There is a problem with the throttle position sen-
sor and motor.
There is a problem with the input circuit of the
stop light switch circuit.
There is a problem with the cancel circuit.
Push the ON±OFF button of the cruise control
main switch on again.
Turn the ignition switch off.
Page 1750 of 4323

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.: 125Actual 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±
Page 1751 of 4323
DI26U±39
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1549
1743 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, check the circuit listed for that code. For details of each
code, refer to the ºSee pageº under the respective ºDTC No.º in the DTC chart.
DTC No.
(See Page)Detection ItemTrouble Area
P0500/21
(DI±1551)Vehicle Speed Sensor Circuit Malfunction
Vehicle speed sensor
Vehicle speed sensor signal circuit
ECM
P0503/23
(DI±1551)Vehicle Speed Sensor Circuit Malfunction
Vehicle speed sensor
Vehicle speed sensor signal circuit
ECM
P0571/52
(DI±1552)Stop Light Switch Circuit Malfunction
Stop light switch assy
Stop light switch assy circuit
ECM
P0607/54
(DI±1556)Input Signal Circuit MalfunctionECM
Page 1752 of 4323
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