Electronic Stability Program

DTC C1057: Power Supply Circuit Failure

Wiring Diagram










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 supply 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
Go to Step 3.
NO
Repair ESP(R) hydraulic unit / control module assembly power supply or ground circuit.

3. ESP(R) hydraulic unit / control module power supply voltage check

Measure battery voltage with engine running at 3000 rpm.

Is voltage 15 V or less?
YES
Substitute a known-good ESP(R) hydraulic unit / control module assembly and recheck.
NO
Check charging system referring to Generator Test.