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 on using the main switch.

(2) Check that the cruise main 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 main switch to - SET.

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(5) Check that "SET" is indicated on the combination meter.

(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 on using the main switch.

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

(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) Push the cruise control main switch to + RES 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 1 km/h or 1 mph.

(c) Inspect the - (COAST) function.

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(1) Turn the cruise control on using the main switch.

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

(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 the vehicle cruises at the newly set speed when the switch is released.

(5) Push the cruise control main switch to - 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 1.6 km/h or 1 mph.

(d) Inspect the CANCEL function.

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(1) Turn the cruise control on using the main switch.

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

(3) Push the cruise control main 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 N or D to B

Turning the main switch off

Pulling the cruise control main switch to CANCEL

(e) Inspect the RES (RESUME) function.

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(1) Turn the cruise control on using the main switch.

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

(3) Push the cruise control main switch to - 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 "+ RES" at a driving speed of more than 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 combination meter.

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 + RES when vehicle speed returns to approximately 40 km/h (25 mph) or more.