Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.

Ignition - On/Vehicle - In Service Mode
Verify DTC P048D, P048E, U0650 is not set.
- If any DTC is set
  Refer to: DTC P048D, P048E, or U0650
- Go to next step: If none of the DTCs are set
Perform the scan tool control function: Exhaust Pressure Regulator Valve Position - Command the component to the minimum position/speed & Release Control
Verify the scan tool parameter:
- Exhaust Pressure Regulator Valve Control Circuit High Test Status = Not Run or Okay
- Exhaust Pressure Regulator Valve Control Circuit Low Test Status = Not Run or Okay
- Exhaust Pressure Regulator Valve Control Circuit Open Test Status = Not Run or Okay
- Exhaust Pressure Regulator Valve Control Circuit Shorted Test Status = Not Run or Okay
- If not the specified state
  Refer to: Circuit/System Testing
- Go to next step: If the specified state
Engine - Idling - At normal operating temperature
Perform the scan tool control function: Exhaust Pressure Regulator Valve Position - Command the component to the minimum position/speed
Verify the scan tool parameter: Exhaust Pressure Regulator Valve Position = The parameter value should change.
- If the parameter value does not change
  Refer to: Circuit/System Testing
- Go to next step: If the parameter value changes
Perform the scan tool control function: Exhaust Pressure Regulator Valve Position - Command the component to the minimum position/speed
Verify the scan tool parameter: Exhaust Pressure Regulator Valve Position = The parameter value should not change
- Perform the action while monitoring the parameter:
- Wiggle the harness and connector(s): K20 Engine Control Module
- Wiggle the harness and connector(s): M122 Exhaust Pressure Control Valve Actuator
- If the parameter value changes
  Repair as necessary - Wiring/Terminal(s)/Electrical Connector(s)
- Go to next step: If the parameter value does not change
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
  Refer to: Circuit/System Testing
- Go to next step: If the DTC is not set
All OK.