Toyota Sequoia (2005). Manual - part 436

DIDEY–01

I24838

(1)

(3)

I24838

(4)

(1)

(3)

I24838

(1)

(3)

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

DI–1539

1733

ROAD TEST

1.

PROBLEM SYMPTOM CONFIRMATION

(a)

Inspect the SET function.
(1)

Push the ON–OFF button on.

(2)

Drive at the required speed (40 km/h (25 mph) or
higher).

(3)

Push the cruise control main switch to –/SET.

(4)

Check that the vehicle cruises at the set speed.

(b)

Inspect the ACC function.
(1)

Push the ON–OFF button on.

(2)

Drive at the required speed (40 km/h (25 mph) or
higher).

(3)

Push the cruise control main switch to –/SET.

(4)

Check that vehicle speed increases while the cruise
control main switch is pushed to +/RES, and that the
vehicle cruises at the newly set speed when the
switch is released.

(5)

Momentarily push the cruise control main switch to
+/RES and then immediately release it. Check that
vehicle speed increases by approximately 1.6 km/h
(1.0 mph) (Tap–up  function).

(c)

Inspect the COAST function.
(1)

Push the ON–OFF button on.

(2)

Drive at the required speed (40 km/h (25 mph) or
higher).

(3)

Push the cruise control main switch to –/SET.

(4)

Check that vehicle speed decreases while the
cruise control main switch is pushed to –/SET, and
that the vehicle cruises at the newly set speed when
the switch is released.

(5)

Momentarily push the cruise control main switch to
–/SET, and then immediately release it. Check that
vehicle speed decreases by approximately 1.6
km/h (1.0 mph) (Tap–down  function).

I24838

(4)

(1)

(3)

I24838

(5)

(1)

(3)

DI–1540

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

1734

(d)

Inspect the CANCEL function.
(1)

Push the ON–OFF button on.

(2)

Drive at the required speed (40 km/h (25 mph) or
higher).

(3)

Push the cruise control main switch to –/SET.

(4)

When doing any one of the following, check that the
cruise control system deactivates and that the nor-
mal driving mode is reset.

Depressing the brake pedal

Moving the shift lever to any position except
D

Pushing the ON–OFF button off

Pulling the cruise control main switch to CAN-
CEL

Reference: Cruise control will deactivate if VSC starts op-
eration while driving.

(e)

Inspect the RES (RESUME) function.
(1)

Push the ON–OFF button on.

(2)

Drive at the required speed (40 km/h (25 mph) or
higher).

(3)

Push the cruise control main switch to –/SET.

(4)

When doing any one of the following, check that the
cruise control system deactivates and that the nor-
mal driving mode is reset.

Depressing the brake pedal

Moving the shift lever to any position except
D

Pulling the cruise control main switch to CAN-
CEL

(5)

After pushing the cruise control main switch to
+/RES while driving, check that the vehicle resumes
the speed set prior to the cancellation.

DI26X–44

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

DI–1541

1735

PROBLEM SYMPTOMS TABLE

If a normal system code is displayed during the DTC check but the problem still occurs, check the circuits
for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting
page.
HINT:
Inspect the ”Fuse” and ”Relay” before confirming the suspected areas shown in the table below.
Inspect each suspected area in numerical order, in relation to the corresponding symptom.
If the malfunction still exists after checking and confirming that all the circuits are normal, replace the ECM.

Symptom

Suspected Area

See page

Main switch cannot be turned ON.
(Cruise indicator light in combination meter does not come on.)

1. Cruise control switch circuit

2. CRUISE main indicator light circuit

3. Combination meter system

4. ECM

DI–1561

DI–1557

DI–1608

IN–35

Vehicle speed setting cannot be done.
(Although indicator light in combination meter comes on when
main switch is turned ON, it goes off when vehicle speed is set.)

1. Cruise control switch circuit

2. ECM

DI–1561

IN–35

Setting cannot be done.
(Indicator light in combination meter comes on when main switch
is turned ON and it remains ON while setting.)

1. Cruise control switch circuit

2. Vehicle speed sensor circuit (DTC P0500)

3. Stop light switch circuit (DTC P0571)

4. Park/neutral position switch circuit (DTC P0705)

5. O/D main switch circuit

6. Combination meter system

7. ECM

DI–1561

DI–278

DI–1552

DI–576

DI–688

DI–1610

IN–35

While vehicle is driven with cruise control, set control is cancelled.
(Indicator light and CRUISE remain ON.)

1. Cruise control switch circuit

2. Vehicle speed sensor circuit (DTC P0500)

3. Stop light switch circuit (DTC P0571)

4. CRUISE main indicator light circuit

5. Park/neutral position switch circuit (DTC P0705)

6. Combination meter system

7. ECM

DI–1561

DI–278

DI–1552

DI–1557

DI–576

DI–1608

IN–35

Hunting
(Speed is not constant.)

1. Vehicle speed sensor circuit (DTC P0500)

2. ECM

DI–278

IN–35

Setting cannot be cancelled.
(When coast, acceleration, resume, or set speed change function
is operated with control switch.)

1. Cruise control switch circuit

2. ECM

DI–1561

IN–35

DTC is not output, or is output when it should not be.

1. Diagnosis circuit

DI–1567

CRUISE main indicator light does not come on.

1. Cruise control switch circuit

2. CRUISE main indicator light circuit

3. Combination meter system

4. ECM

DI–1561

DI–1557

DI–1610

IN–35

DI3CH–22

I28458

E8

E7

E6

E5

E4

DI–1542

–

DIAGNOSTICS

CRUISE CONTROL SYSTEM

1736

TERMINALS OF ECM

Symbols (Terminals No.)

Wiring Color

Terminal Description

Condition

Specified Condition

TC (E4–23) – E1 (E6–1)

P–B – BR

DTC output signal

Ignition switch on

10 to 14 V

TC (E4–23) – E1 (E6–1)

P–B – BR

DTC output signal

Ignition switch on, connect terminals

TC and CG of DLC3

Below 1 V

ST1– (E4–16) – E1 (E6–1)

L–B – BR

Cruise cancel input signal

Ignition switch on, depress brake

pedal

Below 1 V

ST1– (E4–16) – E1 (E6–1)

L–B – BR

Cruise cancel input signal

Ignition switch on, release brake

pedal

10 to 14 V

STP (E4–15) – E1 (E6–1)

G–Y – BR

Stop light switch input sig-

nal

Ignition switch on, depress brake

pedal

10 to 14 V

STP (E4–15) – E1 (E6–1)

G–Y – BR

Stop light switch input sig-

nal

Ignition switch on, release brake

pedal

Below 1 V

CCS (E5–2) – E1 (E6–1)

R–Y – BR

Cruise control main

switch input circuit

Ignition switch on

10 to 14 V

CCS (E5–2) – E1 (E6–1)

R–Y – BR

Cruise control main

switch input circuit

Ignition switch on, CANCEL switch

held ON

6.6 to 10.1 V

CCS (E5–2) – E1 (E6–1)

R–Y – BR

Cruise control main

switch input circuit

Ignition switch on, +/RES switch

held ON

4.5 to 7.1 V

CCS (E5–2) – E1 (E6–1)

R–Y – BR

Cruise control main

switch input circuit

Ignition switch on, –/SET switch

held ON

2.3 to 4.0 V

CCS (E5–2) – E1 (E6–1)

R–Y – BR

Cruise control main

switch input circuit

Ignition switch on, MAIN switch held

ON

Below 1 V

SPD (E5–8) –E1 (E6–1)

G–O – BR

Speed signal

Ignition switch on, rotate driving

wheel slowly

Pulse generation

(see page 

DI–278

)

D (E5–21) –E1 (E6–1)

W–R – BR

D shift position switch in-

put signal

Ignition switch on, shift lever D posi-

tion

10 to 14 V

D (E5–21) –E1 (E6–1)

W–R – BR

D shift position switch in-

put signal

Ignition switch on, shift lever any

position except D

Below 1 V

PI (E5–18) –E1 (E6–1)

LG–R – BR

Cruise indication signal

Ignition switch on, MAIN switch

OFF

10 to 14 V

PI (E5–18) –E1 (E6–1)

LG–R – BR

Cruise indication signal

Ignition switch on, MAIN switch on

Below 1 V