LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Security Control System (DTC/Circuit Diagnosis)) >> DTC / Circuit Diagnosis >> DTC B20A8: IPDM External MALF For St1 >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM SELF DIAGNOSTIC RESULT 

    Perform "Self Diagnostic Result" of "IPDM E/R" using CONSULT.

    Is display history of DTC B20A8 CRNT?

    YES

    GO TO 2.

    NO

    Refer to Intermittent Incident .

  2. CHECK STARTER CONTROL CIRCUIT VOLTAGE 

    Check voltage between IPDM E/R connector E19 and ground.

    IPDM E/R

    Ground

    Condition

    Voltage

    (Approx.)

    Connector

    Terminal

    Ignition switch

    CVT selector lever

    E19

    33

    -

    ON

    P or N

    Battery voltage

    Any position other than P or N

    0V

    Is the inspection result normal?

    YES

    Replace IPDM E/R. Refer to Removal and Installation .

    NO

    Voltage present with CVT selector lever in any position other than P or N GO TO 3.

    NO

    No voltage present with CVT selector lever in P or N, GO TO 4.

  3. CHECK STARTER CONTROL CIRCUIT FOR SHORT TO VOLTAGE 
    1. Disconnect IPDM E/R connector E19 and BCM connector M20.
    2. Check voltage between IPDM E/R connector E19 and ground.

      IPDM E/R

      Ground

      Condition

      Voltage

      (Approx.)

      Connector

      Terminal

      Ignition switch

      CVT selector lever

      E19

      33

      -

      ON

      Any position other than P or N

      0V

    Is the inspection result normal?

    YES

    Replace BCM. Refer to Removal and Installation .

    NO

    Repair or replace harness or connectors.

  4. CHECK STARTER CONTROL CIRCUIT FOR OPEN OR SHORT TO GROUND 
    1. Disconnect IPDM E/R connector E19 and BCM connector M20.
    2. Check continuity between IPDM E/R connector E19 and BCM connector M20.

      IPDM E/R

      BCM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E19

      33

      M20

      62

      Yes

    3. Check continuity between IPDM E/R connector E19 and ground.

      IPDM E/R

      Ground

      Continuity

      Connector

      Terminal

      E19

      33

      -

      No

    Is the inspection result normal?

    YES

    Replace BCM. Refer to Removal and Installation .

    NO

    Repair or replace harness or connectors.