Circuit/System Verification

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

NOTE:

Do NOT replace the control module if DTC P2635 is set.

Ignition - On / Vehicle - In Service Mode
Verify DTC U0074, U18A2 is not set as a history DTC.
- If DTC U0074, U18A2 is set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If DTC U0074, U18A2 is not set
Verify DTC P018B, P018C, P018D, P0231, P0232, P023F is not set.
- If DTC P018B, P018C, P018D, P0231, P0232, P023F is set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If DTC P018B, P018C, P018D, P0231, P0232, P023F is not set
Verify the scan tool parameter: Short Term Fuel Pump Trim & Long Term Fuel Pump Trim = The product should be less than 1.5 when both parameters are multiplied together.
- If 1.5 or greater
  Refer to: Fuel System Diagnosis
- Go to next step: If less than 1.5
Perform the scan tool control function: Fuel Pressure - Increase - 300 kPa (43.5 PSI)
Verify the following parameters are within 45 kPa (6.5 PSI) of each other:
- Desired Fuel Pressure
- Fuel Pressure Sensor
- If not within 45 kPa (6.5 PSI) of each other
  Refer to: Fuel System Diagnosis
- Go to next step: If within 45 kPa (6.5 PSI) of each other
Perform the scan tool control function: Fuel Pressure - Increase - 400 kPa (58 PSI)
Verify the following parameters are within 60 kPa (8.7 PSI) of each other:
- Desired Fuel Pressure
- Fuel Pressure Sensor
- If not within 60 kPa (8.7 PSI) of each other
  Refer to: Fuel System Diagnosis
- Go to next step: If within 60 kPa (8.7 PSI) of each other
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: Fuel System Diagnosis
- Go to next step: If the DTC does not set
All OK.