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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 994 (LAN System) >> Can >> Component Diagnosis >> ECM Branch Line Circuit >> Diagnosis Procedure >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONNECTOR
    1. Turn the ignition switch OFF.
    2. Disconnect the battery cable from the negative terminal.
    3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
      • Models without automatic drive positioner
        • ECM
        • Harness connector E30
        • Harness connector M1
      • Models with automatic drive positioner
        • ECM
        • Harness connector E29
        • Harness connector B10

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair the terminal and connector.

  2. CHECK HARNESS FOR OPEN CIRCUIT
    1. Disconnect the connector of ECM.
    2. Check the resistance between the ECM harness connector terminals.
      CONTINUITY SPECIFICATION

      ECM harness connector Resistance (Ω)
      Connector No. Terminal No.
      E10 98 97 Approx. 108 - 132

    Is the measurement value within the specification? 

    YES: GO TO 3.

    NO: Repair the ECM branch line.

  3. CHECK POWER SUPPLY AND GROUND CIRCUIT

    Check the power supply and the ground circuit of the ECM. Refer to "DIAGNOSIS PROCEDURE ".

    Is the inspection result normal? 

    YES (Present error): Replace the ECM. Refer to "BASIC INSPECTION: SPECIAL REPAIR REQUIREMENT ".

    YES (Past error): Error was detected in the ECM branch line.

    NO: Repair the power supply and the ground circuit.