2001 TOYOTA SEQUOIA Page 18

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.

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 Malfunction
ECM

DI3CI±19
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1551
1745 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
DTC P0500/21 Vehicle speed sensor circuit malfunction
DTC P0503/23 Vehicle speed sensor circuit malfunction
CIRCUIT DESCRIPTION
See page DI±278.
DTC No.DTC Detection ConditionTrouble Area
P0500/21
This trouble code is output when the vehicle speed signal from
the vehicle speed sensor is cut for 0.14 sec. or more while the
cruise control is in operation.
Vehicle speed sensor

Vehicle speed sensor signal circuit

ECM
P0503/23
Momentary interruption and noise are detected when a rapid
change of vehicle speed occurs while the cruise control is in
operation.
Vehicle speed sensor

Vehicle speed sensor signal circuit

ECM
WIRING DIAGRAM
See page DI±278.
INSPECTION PROCEDURE
See page DI±278.

± 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

I28460
Wire Harness View:
E4
STP ST1±
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1555
1749 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check harness and connector (Stop light switch ± battery).
CHECK:
Measure the voltage according to the value(s) in the table below.
OK:
Tester connectionConditionSpecified condition
S14±4 ± Body groundAlways10 to 14 V
S14±2 ± Body groundIgnition SW ON10 to 14 V
NG Repair or replace harness or connector.
OK
5 Check voltage between terminals STP and ST1± of ECM connector and body
ground.
PREPARATION:
(a) Reconnect the stop light switch connector.
(b) Disconnect the ECM connector.
(c) Turn the ignition switch to the ON position.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connection
(Symbol)ConditionSpecified condition
E4±15 (STP) ±
Body groundBrake pedal depressed10 to 14 V
E4±15 (STP) ±
Body groundBrake pedal releasedBelow 1 V
E4±16 (ST1±) ±
Body groundBrake pedal depressedBelow 1 V
E4±16 (ST1±) ±
Body groundBrake pedal released10 to 14 V
NG Repair or replace harness or connector.
OK
Replace ECM (See page IN±35
).

DI±1556
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1750 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0607/54 Input signal circuit malfunction
CIRCUIT DESCRIPTION
This DTC indicates the internal abnormalities of the ECM.
DTC No.Detection ItemTrouble Area
P0607/54
The ECM has a supervisory CPU and a control ECU inside.
When each input STP signal is different for 0.15 sec. or more,
this trouble code is output.
This trouble code is output after 0.4 sec. has passed from the
time the cruise cancel input signal (STP input) is input into the
ECM.

ECM
HINT:
The ECM receives signals from each sensor to control all the functions of the cruise control with the micro-
computer.
When a trouble code is detected, fail safe remains on until the ignition switch is turned off.
INSPECTION PROCEDURE
Replace ECM (See page IN±35).
DIAB7±04

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).

± 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