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OPERATION

OPERATION

GENERAL

The on-board diagnosis function of the cruise control system uses the Vehicle Diagnostic Interface.

The on-board diagnosis function operates in two categories, which are used depending on the type of problems;

Cruise cancel conditions diagnosis:

This category of diagnosis requires actual vehicle driving in order to determine the cause, (as when cruise speed is cancelled during driving although cruise cancel condition is not entered).

Cruise control memory of ECM stores the cancel condition (Code No.) which occurred during driving. When there are plural cancel conditions (Code No.), they are shown on the Vehicle Diagnostic Interface.

Important
• The cruise control memory stores not only the cruise “cancel” which occurred (although “cancel” operation is not entered by the driver), but also the “cancel” condition input by the driver.

• The content of memory is cleared when ignition switch or cruise control main switch is turned OFF.


Real-time diagnosis:

The real-time diagnosis function is used to determine whether or not the input signal system is in good order, according to signal emitted from switches, sensors, etc.

Vehicle cannot be driven at cruise speed because problem occurs in the cruise control system or its associated circuits.

Monitor the signal conditions from switches and sensors.

CRUISE CANCEL CONDITIONS DIAGNOSIS

Prepare the Vehicle Diagnostic Interface kit.

Connect the diagnosis cable to Vehicle Diagnostic Interface.

Connect the Vehicle Diagnostic Interface to data link connector.

Data link connector is located in the lower portion of the instrument panel (on the driver’s side).


Connect the diagnosis cable to data link connector.

Start the engine and turn the cruise control main switch to ON.

Start the Vehicle Diagnostic Interface.

On the Main Menu display screen, select the {2. Each System Diagnosis}.

Select the {Engine} on the System Selection display screen. Select the {OK} after the engine type displayed.

Drive the vehicle at least 40 km/h (25 MPH) with cruise speed set.

If the cruise speed is canceled itself (without doing any cancel operations), a DTC will appear on the display after {Cancel Code(s) Display} is selected on the Engine Diagnosis display screen.

Important
• When performing diagnostics, observe the legal speed of the road.

• A DTC will also appear when cruise cancel is effected by driver. Do not confuse.

• Have a co-worker ride in the vehicle to assist in diagnosis during driving.


Note

DTC will be cleared by turning the ignition switch or cruise control main switch to OFF.


REAL-TIME DIAGNOSIS

Connect the Vehicle Diagnostic Interface.

Turn the ignition switch and cruise control main switch to ON.

Turn the Vehicle Diagnostic Interface switch to ON.

On the Main Menu display screen, select the {2. Each System Check}.

On the System Selection display screen, select the {Engine}.

Select the {OK} after the information of engine type has been displayed.

On the Cruise Control Diagnosis display screen, select the {Current Data Display & Save}.

Make sure that normal indication is displayed when operated as indicated below:


• Depress/release the brake pedal. (Stop light switch and brake switch turn ON.)

• Turn ON the “SET/COAST” switch.

• Turn ON the “RES/ACC” switch.

• Turn ON the “CANCEL” switch. (The “SET/COAST” and “RES/ACC” switch are turned ON at same time.)

• Depress/release the clutch pedal. (MT model)

• Set the shift lever to any position other than neutral. (MT model)

• Place the select lever in any position other than “P” or “N”. (AT model)


Note
• For detailed operation procedure, refer to the Vehicle Diagnostic Interface OPERATION MANUAL.

• For details concerning DTCs, refer to the List of DTC.