ABS

DTC C1057: Power Supply Circuit Failure

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Troubleshooting

1.
Was "ABS Check" performed?
YES -
Go to Step 2.
NO -
Go to ABS Check ABS Check.

2. Check ABS hydraulic unit / control module assembly power supply and ground circuit

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

Are check results OK?
YES -
Go to Step 3
NO -
Repair ABS hydraulic unit / control module assembly power supply or ground circuit.

3. ABS 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 ABS hydraulic unit / control module assembly and recheck.
NO -
Check charging system referring to Testing and Inspection Generator Test.