P00AF

P00AF-TURBOCHARGER BOOST CONTROL MODULE PERFORMANCE





For a complete wiring diagram Refer to Diagrams/Electrical.

Theory of Operation


The variable geometry turbocharger (VGT) is electronically activated by the Electronic Turbo actuator. The Electronic Turbo actuator is a smart device and receives information via the J1939 datalink from the ECM. The Electronic Turbo actuator performs its own diagnostics and reports failures back to the ECM using the J1939 datalink. The ECM then decodes the error message and converts it to a fault code. This fault code is logged when the Electronic Turbo actuator detected an internal error within the Electronic Turbo actuator. The Electronic Turbo actuator will stop controlling the turbocharger when this fault code is active. The ECM lights the MIL lamp after the diagnostic runs and fails in two consecutive drive cycles. The ECM turns off the MIL lamp after the diagnostic runs and passes in 4 consecutive drive cycles

- When Monitored:
Ignition on.

- Set Condition:
The Electronic Turbo actuator has detected an internal error in the VGT smart device.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview


Diagnostic Test


1. OTHER DTC'S
Ignition on, engine not running.
With the scan tool, read DTC's
Is U010C active?

Yes


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


No


- Go To 2



2. ELECTRONIC TURBO ACTUATOR
Turn ignition off.
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 POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test


No


- Replace the Electronic Turbo actuator
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test