Last Modified: 11-29-2007 1.6 D
Service Category: Engine/Hybrid System Section: Cruise Control
Model Year: 2008 Model: Sequoia Doc ID: RM000000V0L010X
Title: CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: ROAD TEST (2008 Sequoia)

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.

(a) Inspect the SET function.

(1) Turn the main switch on.

(2) Drive at the required speed (45 km/h (27 mph) or higher).

(3) Push the cruise control main switch to - (COAST)/SET.

(4) After releasing the switch, check that the vehicle cruises at the set speed.

(b) Inspect the + (ACCEL) function.

(1) Turn the main switch on.

(2) Drive at the required speed (45 km/h (27 mph) or higher).

(3) Push the cruise control main switch to - (COAST)/SET.

(4) 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.

(5) 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 km/h (5 mph).

(c) Inspect the - (COAST) function.

(1) Turn the main switch on.

(2) Drive at the required speed (45 km/h (27 mph) or higher).

(3) Push the cruise control main switch to - (COAST)/SET.

(4) 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.

(5) 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 km/h (5 mph).

(d) Inspect the CANCEL function.

(1) Turn the main switch on.

(2) Drive at the required speed (45 km/h (27 mph) or higher).

(3) Push the cruise control main switch to - (COAST)/SET.

(4) 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
  • The shift lever is moved from D to N or the transmission is shifted to the 3rd, 2nd, or 1st gear with the shift lever in S.
  • Turning the main switch off (the stored vehicle speed in the ECM is not maintained.)
  • Pulling the cruise control main switch to CANCEL

(e) Inspect the RES (RESUME) function.

(1) Turn the main switch on.

(2) Drive at the required speed (45 km/h (27 mph) or higher).

(3) Push the cruise control main switch to - (COAST)/SET.

(4) Cancel the cruise control system by performing any of the above operations (other than turning the main switch off).

(5) 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.