ECD SYSTEM, Diagnostic DTC:P2141, P2142

DTC Code DTC Name
P2141 Open or Short to GND in EGR Throttle Circuit
P2142 Short to B+ in EGR Throttle Circuit

DESCRIPTION

A01368VE01

DTC No. DTC Detection Condition Trouble Area Possible to Detect
Ignition Switch Engine Run
P2141

Open or short in throttle valve (for EGR) circuit for 2 sec. or more

(1 trip detection logic)

  • Throttle valve (for EGR)

  • Throttle valve (for EGR) circuit

  • ECM

 - ON
P2142

Short in throttle valve (for EGR) circuit for 2 sec. or more

(1 trip detection logic)

  • Throttle valve (for EGR)

  • Throttle valve (for EGR) circuit

  • ECM

 - ON

FAIL-SAFE

DTC No. Fail-safe Operation Fail-safe Deactivation Condition
P2141 Stops the EGR. Next engine start.
P2142 - -

WIRING DIAGRAM

A0138HCE03

INSPECTION PROCEDURE

Tech Tips


  • If the ECM is replaced, variant coding (variant coding indicates the presence of vehicle accessory items, A/C, etc.) should always be performed Click here.

  • Before removing the ECM and the peripheral parts, wait at least 3 minute after turning the ignition switch off (If the cooling fan is operating, remove the ECM and the peripheral parts after the fan stops.).

PROCEDURE


  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (THROTTLE VALVE (FOR EGR))


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position and turn the intelligent tester ON.

    3. Clear the DTC Click here.

    4. Select the following menu items: Powertrain / Engine and ECT / Active Test / EGR Throttle.

      OK
      Operating sound can be heard from the throttle valve (for EGR).

    NG

    INSPECT THROTTLE VALVE (FOR EGR) (VOLTAGE) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS

  2. INSPECT THROTTLE VALVE (FOR EGR) (VOLTAGE)


    1. A01373FE03

      Disconnect the B37 throttle valve (for EGR) connector.

    2. Turn the ignition switch to the ON position.

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

      Standard voltage
      Tester Connection Specified Condition
      Throttle valve (for EGR) (B37-1) - Body ground 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - THROTTLE VALVE (FOR EGR)) Click here

    OK

  3. INSPECT THROTTLE VALVE (FOR EGR)


    1. A01374SE02

      Disconnect the B37 throttle valve (for EGR) connector.

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

      Standard resistance
      Tester Connection Specified Condition
      1 - 2 5 to 10 Ω

    NG

    REPLACE THROTTLE VALVE (FOR EGR)

    OK

  4. CHECK HARNESS AND CONNECTOR (THROTTLE VALVE (FOR EGR) - ECM)


    1. A0138RQE02

      Disconnect the B53 ECM connector.

    2. Disconnect the B37 throttle valve (for EGR) connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      TROT (B53-47) - Throttle valve (for EGR) (B37-2) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      TROT (B53-47) or Throttle valve (for EGR) (B37-2) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM

  5. CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - THROTTLE VALVE (FOR EGR))


    1. A01381KE03

      Disconnect the B37 throttle valve (for EGR) connector.

    2. Remove the engine room R/B.

    3. Remove the engine room R/B lower cover.

    4. Disconnect the 1C engine room R/B connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      Throttle valve (for EGR) (B37-1) - Engine room R/B (1C-5) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      Throttle valve (for EGR) (B37-1) or Engine room R/B (1C-5) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT EFI MAIN RELAY (VOLTAGE)


    1. A0136WEE02

      Remove the engine room R/B.

    2. Remove the engine room R/B lower cover.

    3. Disconnect the 1H engine room R/B connector.

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

      Standard voltage
      Tester Connection Specified Condition
      Engine room R/B (1H-1) - Body ground 11 to 14 V

    NG

    CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - EFI MAIN RELAY)

    OK

  7. CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - ECM)


    1. A0136WNE01

      Disconnect the B54 ECM connector.

    2. Remove the engine room R/B.

    3. Remove the engine room R/B lower cover.

    4. Disconnect the 1C engine room R/B connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      MREL (B54-14) - Engine room R/B (1C-8) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      MREL (B54-14) or Engine room R/B (1C-8) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. REPLACE ENGINE ROOM R/B (EFI MAIN RELAY)


    NEXT

  9. CHECK IF DTC RECURS (P2141 AND/OR P2142)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Start the engine and turn the intelligent tester on.

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC output) Proceed To
      No output A
      P2141 and/or P2142 B

    B

    REPLACE ECM

    A

    END