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
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
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
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
Hunting
(Speed is not constant.)
1. Vehicle speed sensor circuit (DTC P0500)
2. ECM
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
DTC is not output, or is output when it should not be.
1. Diagnosis circuit
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
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
)
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
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