Nissan Maxima Service and Repair Manual: Basic inspection

DIAGNOSIS AND REPAIR WORKFLOW

Trouble Diagnosis Flow Chart

Trouble Diagnosis Procedure

INTERVIEW WITH CUSTOMER Interview with the customer is important to detect the root cause of CAN communication system errors and to understand vehicle condition and symptoms for proper trouble diagnosis.

Points in interview

  • What: Parts name, system name
  • When: Date, Frequency
  • Where: Road condition, Place
  • In what condition: Driving condition/environment
  • Result: Symptom

NOTE:

  • Check normal units as well as error symptoms.

    - Example: Circuit between ECM and the combination meter is judged normal if the customer indicates tachometer functions normally.

  • When a CAN communication system error is present, multiple control units may malfunction or go into failsafe mode.

Indication of the combination meter is important to detect the root cause because it is the most obvious to the customer, and it performs CAN communication with many units.

INSPECTION OF VEHICLE CONDITION Check whether the symptom is reproduced or not.

NOTE: Do not turn the ignition switch OFF or disconnect the battery cable while reproducing the error. The error may temporarily correct itself, making it difficult to determine the root cause.

CHECK OF CAN SYSTEM TYPE (HOW TO USE CAN SYSTEM TYPE SPECIFICATION CHART) Determine CAN system type based on vehicle equipment.

NOTE:

  • This chart is used if CONSULT does not automatically recognize CAN system type.
  • There are two styles for CAN system type specification charts. Depending on the number of available system types, either style A or style B may be used.

    CAN System Type Specification Chart (Style A)

NOTE:

CAN system type is easily checked with the vehicle equipment identification information shown in the chart.

CAN System Type Specification Chart (Style B)

NOTE:

CAN system type is easily checked with the vehicle equipment identification information shown in the chart.

CREATE INTERVIEW SHEET

Fill out the symptom described by the customer, vehicle condition, and CAN system type on the interview sheet.

Interview Sheet (Example)

DETECT THE ROOT CAUSE CAN diagnosis function of CONSULT detects the root cause.

    Trouble diagnosis
    Condition of Error Detection DTC (e.g. U1000 and U1001) of CAN communication is indicated on SELF-DIAG RESULTS on CONSULT if a CAN communication signal is not transmitted or received between unit ...

    How to use this manual
    HOW TO USE THIS SECTION Caution This section describes information peculiar to a vehicle and inspection procedures. For trouble diagnosis procedure, refer to LAN-15, "Trouble Diagnosis Proc ...

    Other materials:

    P050A, P050e cold start control
    Description ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition. This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions. DTC Logic DTC DETECTION LOGIC NOTE: If DTC P050A or P050E is dis ...

    Turn signal and hazard warning lamps
    System Diagram System Description BCM (Body Control Module) controls turn signal lamp (RH and LH) and hazard warning lamp operation Combination meter operates turn signal indicator (RH and LH) according to CAN communication signals from BCM. Component Parts Location BCM M16 ...

    P1805 brake switch
    Description Brake switch signal is applied to the ECM via the stop lamp switch when the brake pedal is depressed. This signal is used mainly to decrease the engine speed when the vehicle is being driver. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.PERFORM DTC CONFIRMATI ...

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    Nissan Maxima Service and Repair Manual

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