Toyota Sienna Service Manual: Road test
1. PROBLEM SYMPTOM CONFIRMATION
HINT:
The dynamic laser cruise control system has two cruise
control modes: the constant speed control mode and
vehicle-to-vehicle distance control mode.
- The vehicle-to-vehicle distance control mode is
always selected when starting up the dynamic laser
cruise control system.
- Operation of the constant speed control mode is the
same as that for a conventional cruise control system.

- Inspect the SET function.
- Turn the main switch on.
- Drive at the required speed (45 km/h (28 mph)
or higher).
- Push the cruise control main switch to -
(COAST)/SET.
- After releasing the switch, check that the vehicle
cruises at the set speed.

- Inspect the + (ACCEL) function.
- Turn the main switch on.
- Drive at the required speed (45 km/h (28 mph)
or higher).
- Push the cruise control main switch to -
(COAST)/SET.
- Check that vehicle speed increases while the
cruise control main switch is pushed to +
(ACCEL)/RES (RESUME), and that the vehicle
cruises at the newly set speed when the switch
is released.
- Push the cruise control main switch to +
(ACCEL)/RES (RESUME) and then release it
immediately. Check that vehicle speed
increases* (tap-up control).
HINT:
*: Constant speed control mode: increases by
1.6 km/h (1.0 mph); vehicle-to-vehicle distance
control mode: increases by 5 mph (for USA) or 5
km/h (for Canada).

- Inspect the - (COAST) function.
- Turn the main switch on.
- Drive at the required speed (45 km/h (28 mph)
or higher).
- Push the cruise control main switch to -
(COAST)/SET.
- Check that vehicle speed decreases while the
cruise control main switch is pushed to -
(COAST)/SET, and that the vehicle cruises at
the newly set speed when the switch is released.
- Push the cruise control main switch to -
(COAST)/SET, and then release it immediately.
Check that vehicle speed decreases* (tap-down
control).
HINT:
*: Constant speed control mode: decreases by
1.6 km/h (1.0 mph); vehicle-to-vehicle distance
control mode: decreases by 5 mph (for USA) or
5 km/h (for Canada).

- Inspect the CANCEL function.
- Turn the main switch on.
- Drive at the required speed (45 km/h (28 mph)
or higher).
- Push the cruise control main switch to -
(COAST)/SET.
- When performing any one of the following,
check that the cruise control system is canceled
and that the normal driving mode is reset.
- Depressing the brake pedal
- Moving the shift lever from the D or 4 to the
N, 3, 2 or L position
- Turning the main switch off (the stored
vehicle speed in the ECM is not maintained.)
- Pulling the cruise control main switch to
CANCEL

- Inspect the RES (RESUME) function.
- Turn the main switch on.
- Drive at the required speed (45 km/h (28 mph)
or higher).
- Push the cruise control main switch to -
(COAST)/SET.
- Cancel the cruise control system by performing
any of the above operations (other than turning
the main switch off).
- After pushing the cruise control main switch to +
(ACCEL)/RES (RESUME) at a driving speed of
more than 40 km/h (25 mph), check that the
vehicle resumes the speed set prior to the
cancellation.
HINT:
The stored vehicle speed is retained even if
vehicle speed drops below 40 km/h (25 mph)
once. The previously stored vehicle speed can
be resumed by pushing the cruise control main
switch to + (ACCEL)/RES (RESUME) when
vehicle speed returned to approximately 40 km/h
(25 mph) or more.
HINT:
Use the following procedures to troubleshoot the dynamic
laser cruise control system.
*: Use the intelligent tester
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALY ...
1. INPUT SIGNAL CHECK
Connect the intelligent tester to the DLC3.
Check the cruise control main switch using the
DATA LIST function in the intelligent tester (ONOFF,
CANCEL, ...
Other materials:
A/F Sensor Circuit Slow Response
HINT:
DTC P2A00 indicates malfunctions related to the bank 1 A/F sensor.
DTC P2A03 indicates malfunctions related to the bank 2 A/F sensor.
Bank 1 refers to the bank that includes cylinder No. 1.
Bank 2 refers to the bank that includes cylinder No. 2.
Sensor 1 refers to the sensor mo ...
Illumination Circuit
DESCRIPTION
The Multiplex network body ECU controls illumination light as shown in the
chart below.
Room light assembly (Interior light, luggage component light) and
courtesy light with DOOR position
Map light assembly (Personal light)
Transponder key amplifier (Ignition ke ...
No. 1 Speaker with box
COMPONENTS
ON-VEHICLE INSPECTION
1. INSPECT NO.1 SPEAKER WITH BOX
HINT:
Remove interior parts so that the No.1 speaker with box
can be seen.
Check the speaker installation.
OK:
The speaker is securely installed.
If the result is not as specified, reinstall the No.1
s ...