Road Test

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: ROAD TEST

1. PROBLEM SYMPTOM CONFIRMATION

HINT
The dynamic radar cruise control system has two cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.

* Vehicle-to-vehicle distance control mode is always selected when starting up the dynamic radar cruise control system.
* Operation of constant speed control mode is the same as that for a conventional cruise control system.

(a) Inspect the SET function.

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(1) Turn the cruise control switch (ON-OFF button) on.

(2) Check that the cruise control indicator light illuminates on the combination meter assembly.

(3) Drive at a speed between 50 km/h (30 mph) and 170 km/h (105 mph).

(4) Push the cruise control switch to -/SET.

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(5) Check that cruise control SET indication and the cruise control set speed are displayed on the multi-information display.

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

(b) Inspect the + (ACCEL) function.

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(1) Turn the cruise control switch (ON-OFF button) on.

(2) Drive at a speed between approximately 50 km/h (30 mph) and 170 km/h (105 mph).

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

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

(5) Push the cruise control switch to +/RES and then release it immediately. Check that the vehicle speed increases* (tap-up control).

HINT
*: Constant speed control mode: increases by approximately 1.6 km/h (1 mph); vehicle-to-vehicle distance control mode: increases by approximately 1 km/h (1 mph).

(c) Inspect the - (COAST) function.

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(1) Turn the cruise control switch (ON-OFF button) on.

(2) Drive at a speed between approximately 50 km/h (30 mph) and 170 km/h (105 mph).

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

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

(5) Push the cruise control switch to -/SET, and then release it immediately. Check that the vehicle speed decreases* (tap-down control).

HINT
*: Constant speed control mode: decreases by approximately 1.6 km/h (1 mph); vehicle-to-vehicle distance control mode: decreases by approximately 1 km/h (1 mph).

(d) Inspect the CANCEL function.

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(1) Turn the cruise control switch (ON-OFF button) on.

(2) Drive at a speed between approximately 50 km/h (30 mph) and 170 km/h (105 mph).

(3) Push the cruise control switch to -/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

* Moving the shift lever from D to any other position

* Pulling the cruise control switch to CANCEL

* Turning the cruise control switch off (the stored vehicle speed in the driving support ECU is not maintained)

(e) Inspect the RES (RESUME) function.

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(1) Turn the cruise control switch (ON-OFF button) on.

(2) Drive at a speed between approximately 50 km/h (30 mph) and 170 km/h (105 mph).

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

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

(5) After pushing the cruise control switch to +/RES at a driving speed of more than approximately 40 km/h (25 mph), check that the vehicle resumes the speed set prior to the cancellation and that "SET" is also displayed on the multi-information display.

HINT
The stored vehicle speed is retained even if vehicle speed drops below approximately 40 km/h (25 mph) once. The previously stored vehicle speed can be resumed by pushing the cruise control switch to +/RES when the vehicle speed has returns to approximately 40 km/h (25 mph) or more.