DRIVE-BY-WIRE CONTROL OPERATION [MZR 1.8, MZR 2.0, MZR 2.5]

id0140d7170600

Brake Override System (From GH1***-429761,GH1***-442043,GH10**-206766,GH10**-210449,GH****-210421)

Operation of brake override system

•  In the event of any malfunction in the accelerator system, the vehicle is equipped with a sub-system that prioritizes the brake operation over the accelerator pedal operation. Specifically, the sub-system functions to close throttle valve when the brake pedal is depressed while the accelerator pedal is depressed to safely decelerate the vehicle to a full stop.

Brake override operation conditions

•  If either one of the following conditions is met with the brake pedal depressed for 1 s or more while the accelerator pedal is depressed, the PCM adjusts the throttle valve opening angle so that the engine speed is the specification*. While driving vehicle ―  Accelerator pedal opening angle: 5% or more from fully-closed ―  Vehicle speed: 10 km/h {6.2 mph} or more ―  In gear ―  Engine speed: 1,150 rpm or more While vehicle stopped ―  Accelerator pedal opening angle: 5% or more from fully-closed ―  Shift lever position: neutral (MTX) ―  Selector lever position: N position (ATX) ―  Engine speed: 1,150 rpm or more

End brake override operation

•  To return the throttle to normal operation, the following conditions must be met. ―  Accelerator pedal is not depressed ―  Brake pedal is not depressed Note •  Cycling the key off and back on will also end brake override operation.

Disabling of brake override system

•  If the servicing procedure requiring the brake pedal and the accelerator pedal to be depressed together, operation of the brake override system can be prevented, if necessary.

Disable brake override operation conditions	•  If the following conditions are met for 10 s within 30 s after switching the ignition ON (engine off), the brake override system is disabled until the activate brake override operation conditions are met. ―  Vehicle speed: 0 km/h {0 mph} ―  Accelerator pedal fully depressed ―  Brake pedal depressed
Activate brake override operation conditions	•  Cycling the key off and back on will activate the brake override operation conditions.

Brake warning light illumination request (vehicles without malfunction warning light)

•  If the following condition is met, the PCM sends the brake warning light illumination request signal to the instrument cluster. The brake warning light illuminates to alert the driver that there is a malfunction in the brake system.

―  Brake switch No. 1 or 2 malfunction is detected

Malfunction warning light illumination request (vehicles with malfunction warning light)

•  If the following condition is met, the PCM sends the malfunction warning light illumination request signal to the instrument cluster. The malfunction warning light illuminates to alert the driver that there is a malfunction in the brake system.

―  Brake switch No. 1 or 2 malfunction is detected