ABS Datalogger

ABS Datalogger

The following signals in the Teves Mk IV ABS system may be monitored using the datalogger function.

FBRAKE Brake Switch

The signal from the brake switch is used by the CM to ensure that traction control is inhibited when the brakes are applied. The input circuitry within the CM is a 10K pull-up to ignition voltage. When the switch is closed the parameter is set to 1.

FLWS Front Left Wheel Speed Sensor

An indication sensor outputs a sinusoidal wave form 48 pulses per revolution. The output is processed by the CM to control braking and traction. The sensor is continually monitored for open and short failure and operating range. If its output exceeds 330km/h it is deemed to be faulty and the CM is disabled. The parameter tracks the sensor waveform through 255 steps.

FRWS Front Right Wheel Speed Sensor

An indication sensor outputs a sinusoidal wave form 48 pulses per revolution. The output is processed by the CM to control braking and traction. The sensor is continually monitored for open and short failure and operating range. If its output exceeds 330km/h it is deemed to be faulty and the CM is disabled. The parameter tracks the sensor waveform through 255 steps.

RLWS Rear Left Wheel Speed Sensor

An indication sensor outputs a sinusoidal wave form 48 pulses per revolution. The output is processed by the CM to control braking and traction. The sensor is continually monitored for open and short failure and operating range. If its output exceeds 330km/h it is deemed to be faulty and the CM is disabled. The parameter tracks the sensor waveform through 255 steps.

RRWS Rear Right Wheel Speed Sensor

An indication sensor outputs a sinusoidal wave form 48 pulses per revolution. The output is processed by the CM to control braking and traction. The sensor is continually monitored for open and short failure and operating range. If its output exceeds 330km/h it is deemed to be faulty and the CM is disabled. The parameter tracks the sensor waveform through 255 steps.

Passive Anti Theft (PATS) Diagnostics

Security System Diagnostics

Because of the requirement to maintain vehicle security, the PATS and Security System operating instructions and diagnostics are covered in the Vehicle Security supplement to section 6 of the workshop manual. This supplement has restricted circulation and is only available to Aston Martin Dealers.