Circuit/System Verification

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

Ignition ON.
Verify DTC U0074 or U18A2 is not set or stored in history.
- If DTC U0074 or U18A2 is set or stored in history
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If DTC U0074 or U18A2 is not set or stored in history
Verify that DTC P018B, P018C, P018D, P0231, P0232 or P023F is not set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of the DTCs are set
Verify the scan tool Short Term Fuel Pump Trim and the Long Term Fuel Pump Trim when multiplied together are less than 1.5.
- If greater than 1.5
  Refer to Circuit/System Testing below.
- Go to next step: If less than 1.5
Command the Fuel Pressure to 300 kPa (43.5 psi) using the scan tool Control Function: Fuel Pressure Increase/Decrease.
Verify the scan tool parameter: Fuel Pressure Sensor & Desired Fuel Pressure are within 45 kPa (6.5 psi) of each other at 300 kPa (43.5 psi) request.
- If greater than 45 kPa (6.5 psi)
  Refer to Circuit/System Testing below.
- Go to next step: If less than 45 kPa (6.5 psi)
Command the Fuel Pressure to 400 kPa (58 psi) using the scan tool Control Function: Fuel Pressure Increase/Decrease.
Verify the scan tool parameter: Fuel Pressure Sensor & Desired Fuel Pressure are within 60 kPa (8.7 psi) of each other at 400 kPa (58 psi) request.
- If greater than 60 kPa (8.7 psi)
  Refer to Circuit/System Testing below.
- Go to next step: If less than 60 kPa (8.7 psi)
Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. 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 below.
- Go to next step: If the DTC does not set
All OK.