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

Dtc Description

DTC DETECTION LOGIC

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

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

© 2014-2026 Copyright www.nisentra.com