TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1559
1753 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check combination meter assy.
CHECK:
Check if other functions in the combination meter (speedometer, indicator, etc.) operate normally.
OK:
The other functions operate normally.
NG Go to combination meter system
(See page DI±1610).
OK

I28461
ECM Wire Harness View:
E5
PI
I27704
C5
Combination Meter
Wire Harness View:
C5±2
DI±1560
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1754 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (Combination meter assy ± ECM).
PREPARATION:
Disconnect the combination meter and ECM connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connection
(Symbol)ConditionSpecified condition
C5±2 ± E5±18 (PI)AlwaysBelow 1 W
C5±2 ± Body groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1541).

I28463
BR Spiral Cable Sub±assy
CANCEL ±SET +RES ON±OFF 1ECM
4CCS E5
IG4
3
CCSBRR±Y
Cruise Control Main Switch4 5
5
A
AC9
C9
B
BECC2
EB 14
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1561
1755 Author: Date:
2005 SEQUOIA (RM1146U)
Control Switch Circuit (Cruise Control Switch)
CIRCUIT DESCRIPTION
The cruise control main switch operates seven functions: SET, COAST, TAP±DOWN, RESUME, ACCEL,
TAP±UP, and CANCEL. The SET, TAP±DOWN and COAST functions, and the RESUME, ACCEL and TAP±
UP functions are operated with the same switch. The cruise control main switch is an automatic return type
switch which turns on only while operating it in each arrow direction and turns off after releasing it. The inter-
nal contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads
the CCS terminal voltage value that has been changed by the switch operation to control SET, COAST, RE-
SUME, ACCEL and CANCEL.
WIRING DIAGRAM
DIDF4±01

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

I28553
+/RES
CANCEL±/SETON±
OFF
312
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1563
1757 Author: Date:
2005 SEQUOIA (RM1146U)
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1541).
2 Check cruise control switch continuity.
PREPARATION:
(a) Remove the steering wheel center pad.
(b) Disconnect the cruise control switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Switch conditionTester connectionSpecified condition
Neutral1 ± 3Below 1 W
RES/+1 ± 3210 to 270 W
SET/±1 ± 3560 to 700 W
CANCEL1 ± 31,380 to 1,700 W
Main Switch OFF1 ± 310 kW or higher
Main Switch ON1 ± 3Below 1 W
NG Replace cruise control switch.
OK

I28695
A
B
DI±1564
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1758 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (Cruise control switch ± spiral cable sub±assy).
PREPARATION:
Disconnect the spiral cable connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified condition
A±5 ± B±3AlwaysBelow 1 W
A±4 ± B±1AlwaysBelow 1 W
NG Repair or replace harness or connector.
OK

I28696
Cruise Control Main Switch Side:
A
C9
Vehicle Side:
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1565
1759 Author: Date:
2005 SEQUOIA (RM1146U)
4 Inspect spiral cable sub±assy.
PREPARATION:
Disconnect the vehicle side spiral cable connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified condition
A±5 ± C9±5AlwaysBelow 1 W
A±4 ± C9±4AlwaysBelow 1 W
NG Replace spiral cable sub±assy.
OK

I28461
E5
CCS
ECM Wire Harness View:
I28554
C9
Vehicle Side Connector Front View:
12
3456
78101112 9
DI±1566
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1760 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check harness and connector (ECM ± spiral cable sub±assy).
PREPARATION:
Disconnect the ECM connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connection
(Symbol)ConditionSpecification
C9±5 ± E5±2 (CCS)AlwaysBelow 1 W
C9±4 ± Body groundAlways10 kW or higher
C9±5 ± Body groundAlwaysBelow 1 W
NG Repair or replace harness or connector.
OK
Replace ECM (See page IN±35
).

I28464
ECM
Sub J/B No.4
23
E4
1328
T5
15
A205
4E
TC
TC5
4B
5
4C 5
4D
5
4A 15
1F 9
1A
J43
J/C12
T17 P±B P±B Translate ECU
TCP±B
P±B
O
O 4 TC
CG D6
DLC3 Airbag Sensor
Assembly
Instrument Panel J/BTire Pressure
ECU
P±B
G
A A
IGTC
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1567
1761 Author: Date:
2005 SEQUOIA (RM1146U)
Diagnosis circuit
CIRCUIT DESCRIPTION
Making a short circuit between terminals TC and CG of the DLC3 will output DTCs from the DLC3.
WIRING DIAGRAM
HINT:
When a particular warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an
internal ground short in the relevant ECU is suspected.
DIDF5±01

I28460
E4
TC
ECM Wire Harness View:
C00083
TCD6DLC3:
DI±1568
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1762 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check harness and connector (TC of DLC3 ± ECM).
PREPARATION:
Disconnect the E4 connector from the ECM.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)ConditionSpecified condition
TC (E4±23) ± TC (D6±13)AlwaysBelow 1 W
NG Repair or replace harness or connector.
OK