Auto-Cruise Control - Lancer Evolution: Overview Mitsubishi Lancer X

GENERAL INFORMATION

By using the cruise control system, the driver can drive at preferred speeds in a range of approximately 40 to 200 km/h (25 to 125 mph) without depressing the accelerator pedal.

For this cruise control system, in conjunction with the electronic throttle valve control system, the engine control module (ECM) electronically controls the throttle valve.

Scheme 1

INTRODUCTION TO CRUISE CONTROL SYSTEM DIAGNOSIS

The cruise control system allows driving without stepping on the accelerator pedal by setting a random speed between approximately 40 km/h (25 mph) and 200 km/h (125 mph). Malfunctions in this system can be investigated by the following methods.

CIRCUIT OPERATION

This circuit judges the signals of each switch ("ON/OFF", "CANCEL", "COAST/SET" and "ACC/RES") of the cruise control switch. The ECM detects the state of the cruise control switch by sensing the voltages shown below.

1. When all switches are released: 4.7 - 5.0 volts
2. When the "ON/OFF" switch is pressed: 0 - 0.5 volt
3. When the "CANCEL" switch is pressed: 1.0 - 1.8 volts
4. When the "COAST/SET" switch is pressed: 2.3 - 3.0 volts
5. When the "ACC/RES" switch is pressed: 3.5 - 4.2 volts

1. As for the stoplight switch, when the brake pedal is depressed, the stoplight switch ON signal is transmitted from the ETACS-ECU to the ECM via CAN bus line.
2. As for the brake switch, when the brake pedal is depressed, battery positive voltage is supplied to the stoplight switch (terminal number 3), and when the brake pedal is not depressed, the voltage of ECM (terminal number 108) will indicate 0 volt.

This circuit indicates the operation status of the clutch switch. When the clutch switch is ON (clutch pedal is depressed), the voltage of ECM terminal number 42 will indicate 0 volt.

When the shift lever is in the "N" position, the signal is transmitted from the shift lever ECU to the ECM via CAN bus line.

The ECM detects "ON/OFF" switch "ON" signal to illuminate the "CRUISE" indicator light on the combination meter.

The "CRUISE" indicator light illuminate signal is transmitted from the ECM to the combination meter via CAN bus line.

See also:
• ENGINE CONTROL MODULE (ECM)
• DRIVER'S AIR BAG MODULE INSPECTION
• DATA LIST REFERENCE TABLE