Test M: DTC C1288 - Pressure Transducer Main/Primary Input Circuit Failure

Pinpoint Test M: DTC C1288 - Pressure Transducer Main/Primary Input Circuit Failure

Normal Operation
The brake pedal pressure transducer is integral to the hydraulic control unit (HCU). The transducer sends a signal to the ABS module that varies in relation to the amount of pressure applied to the brake pedal. The more pressure that is applied, the greater the signal sent to the ABS module. If a new transducer needs to be installed, then a new HCU must be installed.

DTC C1288 Pressure Transducer Main/Primary Input Circuit Failure - The pressure transducer signal sent to the ABS module is checked against other ABS module brake pedal inputs and if it does not agree with those inputs, DTC C1288 is set. Also, if the transducer is open, shorted to ground or shorted to voltage, DTC C1288 will be set.

This pinpoint test is intended to diagnose the following:
^ HCU
^ ABS module

M1-M3:

M4: