Nissan Maxima Service and Repair Manual: On board diagnostic (OBD) system

Trouble Diagnosis Introduction

CAUTION:

  • Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so in
    this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connectors.
  • Do not attempt to repair, splice or modify SRS wiring harnesses. If a harness is damaged, replace it
    with a new one.
  • Keep ground connections clean.

DIAGNOSIS FUNCTION

The SRS self-diagnosis results can be read by using "AIR BAG" warning lamp and/or CONSULT.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system malfunction
through the operation of the "AIR BAG" warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the "AIR BAG" warning lamp and CONSULT are as follows:

Nissan Maxima. DIAGNOSIS FUNCTION

HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR

A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symptoms
or conditions for a customer complaint.

Information From Customer

WHAT - Vehicle model<>
WHEN - Date, Frequencies<>
WHERE - Road conditions<>
HOW - Operating conditions, Symptoms

Preliminary Check

Check that the following parts are in good order.

  • Battery
  • Fuse
  • System component-to-harness connections

SRS Operation Check

DIAGNOSTIC PROCEDURE 1

Checking SRS Operation Using "AIR BAG" Warning Lamp-User Mode

Nissan Maxima. DIAGNOSTIC PROCEDURE 1

  1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.
  2. Compare the SRS air bag warning lamp blinking pattern with the
    examples.

SRS Air bag warning lamp examples

Nissan Maxima. SRS Air bag warning lamp examples

DIAGNOSTIC PROCEDURE 2

  1. Connect CONSULT.
  2. Diagnostic code is displayed on "SELF-DIAG [CURRENT]".

If no malfunction is detected on "SELF-DIAG [CURRENT]", but malfunction is detected in "SRS Operation
Check" using the "AIR BAG" warning lamp, the following cases may exist:

  • "SELF-DIAG [PAST]" memory might not be erased.
  • The SRS system malfunctions intermittently.
    Perform DIAGNOSTIC PROCEDURE 4. Refer to SRC-14, "Self-Diagnosis Function (Without CONSULT)".

Trouble Diagnosis without CONSULT

DIAGNOSTIC PROCEDURE 6

Inspect SRS Malfunction Using "AIR BAG" Warning Lamp-Diagnosis Mode

NOTE:
SRS will not enter Diagnosis mode if no malfunction is detected in User mode.

  1. Turn ignition switch ON.
  2. After "AIR BAG" warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.
  3. Wait more than 3 seconds.
  4. Repeat steps 1 to 3 two more times (3 times total).
  5. Turn ignition switch ON.

SRS is now in Diagnosis mode. Refer to SRC-56, "Trouble Diagnosis without CONSULT".

CONSULT Function (AIR BAG)

CONSULT can display each diagnostic item using the diagnostic test modes shown.

Nissan Maxima. CONSULT Function (AIR BAG)

Self-Diagnosis Function (Without CONSULT)

  • The reading of these results is accomplished using one of two modes -"User mode" and "Diagnosis mode".
  • After a malfunction is repaired, turn the ignition switch OFF for at least one second, then back ON. Diagnosis
    mode returns to the User mode. At that time, the self-diagnostic result is cleared.

HOW TO CHANGE SELF-DIAGNOSIS MODE

Nissan Maxima. HOW TO CHANGE SELF-DIAGNOSIS MODE

DIAGNOSTIC PROCEDURE 3

Final Check of SRS Using CONSULT - Diagnosis Mode

  1. Connect CONSULT.
  2. If no DTC is detected on "SELF-DIAG [CURRENT]", repair of SRS is completed. Go to step 3.
    If any DTC is detected on "SELF-DIAG [CURRENT]", the malfunctioning part has not been repaired completely
    or another malfunctioning part is being detected. Perform DIAGNOSTIC PROCEDURE 2. Refer to
    SRC-12, "SRS Operation Check".
  3. Touch "ERASE".
    NOTE:
    Touch "ERASE" to clear the memory of the malfunction ("SELF-DIAG [PAST]").
    If the memory of the malfunction in "SELF-DIAG [PAST]" is not erased, the User mode shows the system
    malfunction by the operation of the warning lamp even if the malfunction is repaired completely.
  4. Touch "BACK" key of CONSULT. Touch "SELF-DIAG [PAST]".
  5. Check that no malfunction is detected on "SELF-DIAG [PAST]".
  6. Touch "BACK" key of CONSULT to return to User mode from Diagnosis mode.
  7. Turn ignition switch OFF and then turn off and disconnect CONSULT.
  8. Go to SRC-12, "SRS Operation Check".

DIAGNOSTIC PROCEDURE 4

Check SRS Repair History

1.CONSIDER POSSIBILITY THAT SELF-DIAGNOSTIC RESULT WAS NOT ERASED AFTER REPAIR

Check repair history of the SRS.

    Passenger seat belt warning system
    System Diagram System Description The seat belt warning lamp (1) will remind the driver if the driver or front passenger seat belt should be buckled. The system works inconjunction with the o ...

    DTC/circuit diagnosis
    ...

    Other materials:

    P1715 input speed sensor
    Description ECM receives input speed sensor signal from TCM via the CAN communication line. ECM uses this signal for engine control. DTC Logic DTC DETECTION LOGIC NOTE:  If DTC P1715 is displayed with DTC UXXXX first perform the trouble diagnosis for DTC UXXXX. Refer to EC-161 ...

    A-bag branch line circuit
    Diagnosis Procedure WARNING: Always observe the following items for preventing accidental activation. - Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes or more. (To discharge backup capacitor.) - Never use unspecified tester or other ...

    Stopping the vehicle
    1. Safely move the vehicle off the road and away from traffic. 2. Turn on the hazard warning flashers. 3. Park on a level surface and apply the parking brake. Move the shift lever to P (Park). 4. Turn off the engine. 5. Raise the hood to warn other traffic and to signal professional roa ...

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