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Nissan Sentra B18 (2020-2025) Service Manual: P28ee-00 Electric Oil Pump

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P28EE

00

EL/AUX T/M FLUID PUMP B

(Electric/Auxiliary Transmission Fluid Pump "B" Overspeed)

Diagnosis condition

Diagnosis is permitted when all of the following conditions are satisfied:

a) Ignition voltage ≥ 9.01 V

b) Battery voltage ≥ 9.01 V

c) After ignition on, 1 sec has elapsed.

d) Target electric oil pump speed ≥ 500 rpm

e) Electric oil pump motor temperature ≤ 179 °C (354 °F)

Signal

—

Threshold

When the actual electric oil pump speed is lower than the target electric oil pump speed

Diagnosis delay time

2 seconds

POSSIBLE CAUSE

  • Electric oil pump

  • Control valve

  • Input voltage

FAIL-SAFE

Stop/start system prohibited

DTC CONFIRMATION PROCEDURE

  1. PREPARATION BEFORE WORK

    If another "DTC CONFIRMATION PROCEDURE" occurs just before, ignition switch OFF and wait for at least 10 seconds, then perform the next test.

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 10 V.

    >>

    GO TO 2.

  2. CHECK DTC DETECTION

    1. Ignition switch ON and wait for at 20 seconds.

    2. Check the DTC.

    Is "P28EE-00" detected?

    YES >>

    Proceed to DTC Diagnosis Procedure.

    NO-1>>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    NO-2>>

    Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK ELECTRIC OIL PUMP POWER SUPPLY

    1. Ignition switch OFF.

    2. Disconnect CVT unit harness connector.

    3. Ignition switch ON.

    4. Check voltage between CVT unit harness connector terminal and ground.

      +

      -

      Voltage

      CVT unit

      Connector

      Terminal

      F56

      24

      Ground

      10 - 16 V

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 2.

  2. CHECK ELECTRIC OIL PUMP POWER SUPPLY CIRCUIT - 1

    Check the following items:

    • Open or short circuit of harness between battery positive terminal and CVT unit harness connector terminal 24.

    • 60A fusible link (No. L)

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Repair harness, connector, or fusible link

  3. CHECK ELECTRIC OIL PUMP GROUND CIRCUIT - 1

    1. Ignition switch OFF.

    2. Check continuity between CVT unit harness connector terminal and ground.

      CVT unit

      -

      Continuity

      Connector

      Terminal

      F56

      23

      Ground

      Existed

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace damaged parts.

  4. CHECK ELECTRIC OIL PUMP CAN CIRCUIT - 1

    1. Disconnect TCM harness connector.

    2. Check resistance between TCM harness connector terminals and CVT unit harness connector terminals.

      TCM

      CVT unit

      Resistance

      Connector

      Terminal

      Connector

      Terminal

      F23

      31

      F46

      11

      1 Ω or less

      32

      10

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair harness or connector.

  5. CHECK PRIMARY SPEED SENSOR GROUND CIRCUIT - 2

    1. Remove control valve cover. Refer to Removal and Installation.

      CAUTION:

      Never disconnect harness connector F102 inside the CVT unit. Refer to Wiring Diagram.

    2. Check continuity between CVT unit connector terminal and electric oil pump harness terminal.

      CVT unit

      Electric oil pump

      Continuity

      Terminal

      Connector

      Terminal

      23

      F108

      5

      Existed

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair harness or connector.

  6. CHECK ELECTRIC OIL PUMP POWER SUPPLY CIRCUIT - 2

    Check continuity between CVT unit connector terminal and electric oil pump harness terminal.

    CVT unit

    Electric oil pump

    Continuity

    Terminal

    Connector

    Terminal

    24

    F107

    4

    Existed

    Is the check result normal?

    YES >>

    GO TO 7.

    NO >>

    Repair harness or connector.

  7. CHECK ELECTRIC OIL PUMP CAN CIRCUIT - 2

    1. Disconnect electric oil pump harness connector.

    2. Check resistance between CVT unit connector terminals and electric oil pump harness connector terminals.

      CVT unit

      Electric oil pump

      Resistance

      Terminal

      Connector

      Terminal

      10

      F106

      2

      1 Ω or less

      11

      3

    Is the inspection result normal?

    YES >>

    GO TO 8.

    NO >>

    Replace control valve due to harness connector malfunction. Refer to Removal and Installation.

  8. REPLACE ELECTRIC OIL PUMP

    Replace electric oil pump. Refer to Removal and Installation.

    >>

    GO TO 9.

  9. CHECK DTC DETECTION

    Perform DTC confirmation procedure. Refer to DTC Description.

    Is "P28EE-00" detected again?

    YES >>

    Replace control valve. Refer to Removal and Installation.

    NO >>

    INSPECTION END

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