DTC P0191: Fuel Rail Pressure Sensor Circuit Range / Performance [09/2014 - 10/2015]: Procedure
- CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0191)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the DTCs.
Result Proceed to DTC P0191 is output A DTC P0191 and P0087, P0088, P0171, P0172, P0174 and/or P0175 are output DTC P0191 and other DTCs are output B HINT:
If DTC P0191 and P0087, P0088, P0171, P0172, P0174 and/or P0175 are output simultaneously, troubleshoot for DTC P0191 first.
Result: B
B
GO TO DTC CHART
(See service information). Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015] )
Result: A
A
See step 2
- CHECK FUEL LEAK
- Check around and beneath the vehicle for fuel leaks, fumes, etc.
OK
No fuel leaks present.
Result: NG
NG
See step 10
Result: OK
OK
See step 3
- Check around and beneath the vehicle for fuel leaks, fumes, etc.
- PERFORM ACTIVE TEST USING TECHSTREAM
- Connect the Techstream to the DLC3.
- Start the engine and warm it up.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Target Fuel Pressure / Fuel System / High Fuel Pressure Sensor.
- Check the value of the Data List item "High Fuel Pressure Sensor" when the target fuel pressure is increased and decreased using the Active Test.RESULT
Result Proceed to "High Fuel Pressure Sensor" value follows the change in target fuel pressure A "High Fuel Pressure Sensor" value does not follow the change in target fuel pressure B
Result: B
B
See step 9
Result: A
A
See step 4
- CHECK HARNESS AND CONNECTOR (ECM - FUEL PRESSURE SENSOR)
- Disconnect the ECM connector.
- Disconnect the fuel pressure sensor connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F5-86 (PR) - F45-3 (PR) Always Below 1 Ω F5-85 (EPR) - F45-2 (E2) Always Below 1 Ω F5-86 (PR) or F45-3 (PR) - Body ground Always 10 kΩ or higher
Result: NG
NG
See step 8
Result: OK
OK
See step 5
- REPLACE FUEL PRESSURE SENSOR
- Replace the fuel pressure sensor (See service information). Refer to REMOVAL [09/2014 - ] ).
Result: NEXT
NEXT
See step 6
- CHECK WHETHER DTC OUTPUT RECURS (DTC P0191)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Clear the DTCs.
- Turn the engine switch off and wait for at least 30 seconds.
- Turn the Techstream on.
- Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the pending DTCs.RESULT
Result Proceed to DTC P0191 is output A DTCs are not output B
Result: B
B
END
Result: A
A
See step 7
- REPLACE ECM
- Replace the ECM (See service information). Refer to REMOVAL [09/2014 - ] ).
Result: NEXT
NEXT
See step 11
- REPAIR OR REPLACE HARNESS OR CONNECTOR
- Repair or replace the wire harness or connector.
Result: NEXT
NEXT
See step 11
- REPLACE FUEL PRESSURE SENSOR
- Replace the fuel pressure sensor (See service information). Refer to REMOVAL [09/2014 - ] ).
Result: NEXT
NEXT
See step 11
- REPAIR OR REPLACE FUEL LEAK POINT
- Repair or replace the fuel leak point.
Result: NEXT
NEXT
See step 11
- CHECK WHETHER DTC OUTPUT RECURS (DTC P0191)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Clear the DTCs.
- Turn the engine switch off and wait for at least 30 seconds.
- Turn the Techstream on.
- Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the pending DTCs.
OK
DTCs are not output
Result: NEXT
NEXT
END