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Nissan Sentra B18 (2020-2025) Service Manual: P0890-00 Tcm

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0890

00

TCM

(Transmission Control Module Power Relay Sense Circuit Low)

1

Diagnosis condition

—

Signal

Battery voltage signal

Threshold

DTC is detected when one of the following conditions "a" and "B" are satisfied:

a) Power supply voltage > 10 V

b) Battery voltage < 7.4 V

Diagnosis delay time

0.2 second

2

Diagnosis condition

—

Signal

Battery voltage signal

Threshold

DTC is detected when the following condition "a" is satisfied:

a) Power supply voltage - Battery voltage > 2.6 V

Diagnosis delay time

5 seconds

POSSIBLE CAUSE

  • Harness or connector

  • TCM

FAIL-SAFE

  • Selector shock is large

  • Start is slow

  • Acceleration is slow

  • Lock-up is not performed

  • Nissan Sentra Vehicle speed is not increased

  • 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. Start the engine and wait for 10 seconds or more.

    2. Check the DTC.

    Is "P0890-00" detected?

    YES >>

    Proceed to Diagnosis Procedure.

    NO-1>>

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

    NO-2>>

    Confirmation after repair: INSPECTION END

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK TCM BATTERY POWER SUPPLY CIRCUIT

    1. Ignition switch OFF.

    2. Disconnect TCM harness connector.

    3. Check voltage between TCM harness connector terminal and ground.

      +

      −

      Voltage

      TCM

      Connector

      Terminal

      Ground

      Battery voltage

      F23

      45

      46

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 2.

  2. DETECT MALFUNCTIONING ITEMS

    Check the following items:

    • Open or short circuit of harness between battery positive terminal and TCM harness connector terminals 45 and 46.

    • 10A fuse (No. 67).

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Repair harness, connector, or fuse.

  3. CHECK CONNECTOR TERMINAL

    Check the connector of TCM for water intrusion, or damage or corrosion of the terminals.

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Replace TCM. Refer to Removal and Installation.

  4. CHECK DTC DETECTION

    1. Connect TCM harness connector.

    2. Perform DTC confirmation procedure. Refer to DTC Description.

    Is "P0890-00" detected again?

    YES >>

    Replace TCM. Refer to Removal and Installation.

    NO >>

    INSPECTION END

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