P0572

P0572-BRAKE SWITCH 1 STUCK ON





For a complete wiring diagram refer to the Wiring Information Electrical Diagrams.

- When Monitored:
While the ignition is on

- Set Condition:
The brake switch status is = to OFF and the not brake switch status is = to ON for a calibrated amount of time.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure

1. BRAKE SWITCH CIRCUIT SHORTED TO GROUND
1. Turn the ignition off.
2. Disconnect the brake switch connection. Inspect the pins and connector for damage, corrosion, etc.
3. Disconnect the ECM connectors. Inspect the pins and connector for damage, corrosion, etc.

NOTE: Check connectors - Clean/repair as necessary.

4. Measure the resistance between the brake switch circuit in the ECM connector and battery negative.

Is the resistance less than 10 ohms?

Yes

- Repair the Brake switch circuit shorted to ground.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Go To 2

2. BRAKE SWITCH CIRCUIT SHORTED TO OTHER CIRCUITS IN HARNESS
1. Measure the resistance between the brake switch wire in the ECM connector and all other pins in the ECM connector.

Is the resistance less than 10 ohms?

Yes

- Repair or replace the harness.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Go To 3

3. ECM
1. Reconnect the ECM connectors.
2. Measure the resistance between the brake switch circuit at the switch connector and battery negative.

Is the resistance less than 10 ohms?

Yes

- Replace the ECM.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Go To 4

4. BRAKE SWITCH
1. Reconnect the brake switch connector.
2. Using the scan tool, clear the DTCs.
3. Turn the ignition on.
4. Cycle the brake pedal several times.
5. Using the scan tool, read the DTCs.

Has the brake switch low DTC returned?

Yes

- Replace the brake switch.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Perform INTERMITTENT CONDITION - DIESEL test.Intermittent Condition Test