P: C1440 Pressure Transducer Input Circuit Failure

Pinpoint Test P: DTC C1440 Pressure Transducer Input Circuit Failure
Normal Operation
The pressure transducer transforms brake fluid pressures in the master cylinder to an electrical signal which the anti lock brake system (ABS) module receives through circuit 8-CF64 (WH/BK). The transducer receives a 5 volt reference from the ABS module through circuit 7-CF64 (YE/BK). Circuit 9-CF64 (BN/YE) provides ground for the transducer.

Possible Causes
^ power circuit 7-CF64 (YE/BK) open, short to ground, or short to voltage
^ ground circuit 9-CF64 (BN/YE) open, short to ground, or short to voltage
^ transducer signal circuit 8-CF64 (WH/BK) short to ground or short to voltage
^ pressure transducer
^ ABS module

Test P1-P2:

Test P2-P4:

Test P4-P6:

PINPOINT TEST P: DTC C1440 PRESSURE TRANSDUCER INPUT CIRCUIT FAILURE

NOTE: Excessive clearance between brake pad and rotor, leaks, or air in the hydraulic brake system can also set DTC C1440.