СИСТЕМА ECD, Diagnostic DTC:P046C

DTC Code DTC Name
P046C Exhaust Gas Recirculation Sensor "A" Circuit Range / Performance

DESCRIPTION

The EGR position sensor is installed to the EGR valve assembly and is supplied with 5 V from the ECM. The voltage signal from the position sensor is converted at the ECM, which turns the voltage into a percentage.

The ECM uses the EGR position sensor to measure the EGR valve adjustment amount. The EGR valve adjustment amount is used to control the EGR.

DTC No. DTC Detection Condition Trouble Area
P046C

Either condition is met (3 trip detection logic):


  • EGR valve position sensor output voltage is 0.1 V or less for 0.3 seconds.

  • EGR valve position sensor output voltage is 4.9 V or higher for 0.3 seconds.

  • Open or short in EGR valve position sensor (EGR valve assembly) circuit

  • EGR valve position sensor (EGR valve assembly)

  • ECM

WIRING DIAGRAM

A01IR66E54

INSPECTION PROCEDURE

Note


  • When replacing the ECM, the ECM needs Registration and Initialization Click here.

  • After replacing the EGR valve assembly, the ECM needs initialization Click here.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. 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.

PROCEDURE


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


    1. Disconnect the EGR valve assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C87-1 (VC) - C84-69 (VCEG) Always Below 1 Ω
      C87-3 (EGLS) - C84-116 (EGLS) Always Below 1 Ω
      C87-2 (E2) - C84-84 (EEGL) Always Below 1 Ω
      C87-1 (VC) or C84-69 (VCEG) - Body ground Always 10 kΩ or higher
      C87-3 (EGLS) or C84-116 (EGLS) - Body ground Always 10 kΩ or higher
      C87-2 (E2) or C84-84 (EEGL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (VC VOLTAGE)


    1. Disconnect the EGR valve assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C87-1 (VC) - C87-2 (E2) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  3. REPLACE EGR VALVE ASSEMBLY


    1. Replace the EGR valve assembly Click here.

    2. Perform EGR learning value reset Click here.


    NEXT

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P046C)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P046C B

    B

    REPLACE ECM Click here

    A

    END

  5. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  7. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.


    NEXT

    END