C1028

DTC C1020 / C1028: Master Cylinder Pressure Sensor Power Supply Circuit Failure / Circuit Failure

DTC Detecting Condition and Trouble Area






DTC Troubleshooting



1.
Was "Electronic Stability Program Check" performed?
YES
Go to Step 2.
NO
Go to Electronic Stability Program Check.

2. Check ESP(R) hydraulic unit / control module assembly power and ground circuit

Check that ESP(R) hydraulic unit / control module assembly power supply circuit and ground circuit is in good condition referring to ESP Hydraulic Unit / Control Module Assembly Power Supply and Ground Circuit Check ESP(R) Hydraulic Unit / Control Module Assembly Power Supply and Ground Circuit Check.

Are check results OK?
YES
Substitute a known-good ESP(R) hydraulic unit / control module assembly and recheck.
NO
Repair ESP(R) hydraulic unit / control module assembly power or ground circuit.