DTC    P0651    Sensor Reference Voltage "B" Circuit / Open

for Preparation Click here


DESCRIPTION

Refer to DTC P0192 (Click here), DTC P0405 (Click here) and DTC P2564 (Click here).

P0651 
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch is ON
Power voltage (5 V as standard) supplied from ECM to nozzle vane position sensor, fuel pressure sensor and EGR valve position sensor are lower or higher than threshold.
(1 trip detection logic)
  1. Turbocharger sub-assembly (nozzle vane position sensor)
  2. Open or short in nozzle vane position sensor circuit
  3. Common rail assembly (fuel pressure sensor)
  4. Open or short in fuel pressure sensor circuit
  5. Electric EGR valve assembly (EGR valve position sensor)
  6. Open or short in EGR valve position sensor circuit
  7. ECM

WIRING DIAGRAM

DTC P0192 (Click here), DTC P0405 (Click here) and DTC P2564 (Click here).

INSPECTION PROCEDURE

NOTICE:
When replacing the ECM, the ECM needs Registration and Initialization (Click here).

HINT:
  1. When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initializations/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.
  2. Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

1.CHECK HARNESS AND CONNECTOR (NOZZLE VANE POSITION SENSOR - ECM))


    A200303E04

  1. Disconnect the nozzle vane position sensor connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B39-3 (VTA1) or B9-38 (VTAI) - Body ground
    		Always
    		10 kΩ or higher
    B39-1 (VNVC) or B9-37 (VNVC) - Body ground
    		Always
    		10 kΩ or higher
    B39-2 (VNE2) or B9-36 (VNE2) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Nozzle Vane Position Sensor)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the nozzle vane position sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 13
OK


2.INSPECT ECM (VC VOLTAGE)


    A200304E18

  1. Disconnect the nozzle vane position sensor connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    B39-1 (VNVC) - B39-2 (VNE2)
    		Ignition switch ON
    		4.5 to 5.5 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Nozzle Vane Position Sensor)

  1. Reconnect the nozzle vane position sensor connector.



NG
Go to step 14
OK


3.CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)


    A200301E01

  1. Disconnect the fuel pressure sensor connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B44-2 (PCR1) or B9-16 (PC) - Body ground
    		Always
    		10 kΩ or higher
    B44-3 (VC1) or B9-15 (VCS) - Body ground
    		Always
    		10 kΩ or higher
    B44-1 (E1) or B9-14 (E2S) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Fuel Pressure Sensor)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the fuel pressure sensor connector.

  1. Reconnect the ECM connector.



NG
Go to step 13
OK


4.INSPECT ECM (VC VOLTAGE)


    A200302E01

  1. Disconnect the fuel pressure sensor connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    B44-3 (VC1) - B44-1 (E1)
    		Ignition switch ON
    		4.5 to 5.5 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Fuel Pressure Sensor)

  1. Reconnect the fuel pressure sensor connector.



NG
Go to step 14
OK


5.CHECK HARNESS AND CONNECTOR (ELECTRIC EGR VALVE ASSEMBLY - ECM)


    A200328E01

  1. Disconnect the electric EGR valve assembly connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B50-5 (VC) or B9-26 (VCEG) - Body ground
    		Always
    		10 kΩ or higher
    B50-4 (VTA) or B9-27 (EGLS) - Body ground
    		Always
    		10 kΩ or higher
    B50-3 (E2) or B9-25 (EEGL) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Electric EGR Valve Assembly)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the electric EGR valve assembly connector.

  1. Reconnect the ECM connector.



NG
Go to step 13
OK


6.INSPECT ECM (VC VOLTAGE)


    A200329E01

  1. Disconnect the electric EGR valve assembly connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    B50-5 (VC) - B50-3 (E2)
    		Ignition switch ON
    		4.5 to 5.5 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Electric EGR Valve Assembly)

  1. Reconnect the electric EGR valve assembly connector.



NG
Go to step 14
OK


7.REPLACE TURBOCHARGER SUB-ASSEMBLY (NOZZLE VANE POSITION SENSOR)

  1. Replace the turbocharger sub-assembly (Click here).


NEXT


8.CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off and wait for 30 seconds or more.

  1. Turn the ignition switch to ON.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTC.
    Result 
    Result
    		Proceed to
    No DTC output
    		A
    P0651
    		B



B
Go to step 9
A

END 

9.REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR)

  1. Replace the common rail assembly (Click here).


NEXT


10.BLEED AIR FROM FUEL SYSTEM

  1. Bleed air from fuel system (Click here).


NEXT


11.CHECK WHETHER DTC OUTPUT RECURS (DTC P0651)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off and wait for 30 seconds or more.

  1. Turn the ignition switch to ON.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTC.
    Result 
    Result
    		Proceed to
    No DTC output
    		A
    P0651
    		B



B
Go to step 12
A

END 

12.REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY (EGR VALVE POSITION SENSOR)

  1. Replace the electric EGR valve assembly (Click here).



NEXT
Go to step 15

13.REPAIR OR REPLACE HARNESS OR CONNECTOR


NEXT
Go to step 15

14.REPLACE ECM

  1. Replace the ECM (Click here).


NEXT


15.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off and wait for 30 seconds or more.

  1. Turn the ignition switch to ON.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Confirm that the DTC is not output again.


NEXT

END