Toyota Sequoia (2005). Manual - part 437

A08841

Hand–held Tester

DLC3

DIDEZ–01

A04550

DLC3

1 2 3 4 5 6 7 8

9

10 11 12 1314 1516

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

DI–1543

1737

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 Description

Condition

Specified Condition

SIL(7) – SG(5)

Bus ”+” line

During transmission

Pulse generation

CG(4) – Body ground

Chassis ground

Always

Below 1 

Ω

SG(5) – Body ground

Signal ground

Always

Below 1 

Ω

BAT(16) – Body ground

Battery positive

Always

11 to 14 V

HINT:
If the display shows ”UNABLE TO CONNECT TO VEHICLE” 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.

I11929

CRUISE Main 
Indicator Light

BE4034

Indicator Light

1.5 secs.

0.5 secs.

ON

OFF

DI–1544

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

1738

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).

DIDF0–01

A04550

TC

CG

1 2 3 4 5 6 7 8

9

10 11 12 1314 1516

I11929

CRUISE Main 
Indicator Light

I28693

Normal System Code:

ON

OFF

Code 52

Code 21

0.25 sec.

0.25 sec.

ON

OFF

Diagnostic Trouble  Code:

4.5 sec.

2.5 sec.

1.5 sec.

0.5 sec.

0.5 sec.

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

DI–1545

1739

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.

A08841

DLC3

Hand–held Tester

DI–1546

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

1740

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.