P00AF

P00AF-TURBOCHARGER BOOST CONTROL MODULE PERFORMANCE





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Variable Geometry Turbocharger (VGT) is electronically controlled by the Electronic Turbo Actuator. The Electronic Turbo Actuator is a smart device; it communicates information with the Powertrain Control Module (PCM) over the J1939 BUS. The Electronic Turbo Actuator performs its own internal diagnostics and reports failures back to the Powertrain Control Module (PCM). The PCM then decodes the error message and converts it to a fault code. The PCM lights the Malfunction Indicator Lamp (MIL) after the diagnostic runs and fails in two consecutive drive cycles. The PCM will turn off the MIL immediately after this diagnostic runs and passes in four consecutive drive cycles.

- When Monitored:
Ignition on.

- Set Condition:
The Electronic Turbo Actuator has detected an internal error in the Variable Geometry Turbocharger (VGT) smart device.





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

1. OTHER DTCs
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.

Is U010C active?

Yes

- Repair U010C first.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 2

2. ELECTRONIC TURBO ACTUATOR
1. Turn ignition off.
2. Disconnect the Electronic Turbo Actuator harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Are there dirty or damaged pins?

Yes

- Repair/Replace as necessary.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

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