Description of On-Board Diagnostics

CAUTION:
- Do not use electrical test equipment on any circuit related to the SRS unless instructed. SRS wiring harnesses are covered with yellow insulation Just before the harness connectors for easy identification.
- Do not attempt to repair, splice or modify the SRS wiring harness. If the harness is damaged, replace it with a new one.
- Keep ground portion clean.





DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using the "AIR BAG" warning lamp and/or CONSULT. The reading of these results is accomplished using one of two modes - "User mode" and "Diagnosis mode". 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:

DIAGNOSIS MODE FOR CONSULT

SELF-DIAG [CURRENT]
A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis mode) is displayed on the CONSULT screen in real time. This refers to a malfunctioning part requiring repairs.

SELF-DIAG [PAST]
Diagnosis results previously stored in the memory are displayed on the CONSULT screen. The stored results are not cleared until memory erasing is executed.

TROUBLE DIAG RECORD
With "TROUBLE DIAG RECORD", diagnosis results previously erased by a reset operation can be displayed on the CONSULT screen.





ECU DISCRIMINATED NO.
The diagnosis sensor unit for each vehicle model is assigned with its own, individual classification number. This number will be displayed on the CONSULT screen, as shown at left. When replacing the diagnosis sensor unit, refer to the part number for the compatibility. After installation, replacement with a correct unit can be checked by confirming this classification number on the CONSULT screen.

NOTE: For NISSAN model S14, the diagnosis sensor unit classification number assigned is 26.

HOW TO CHANGE SELF DIAGNOSIS MODE (WITH CONSULT)





- From User Mode To Diagnosis Mode
Touch "AIRBAG" on the "SELECT SYSTEM" screen. User mode automatically changes to Diagnosis mode.





- From Diagnosis Mode To User Mode
Touch "BACK' key of CONSULT until "SELECT SYSTEM" appears, Diagnosis mode automatically changes to User mode.

HOW TO CHANGE SELF DIAGNOSIS MODE (WITHOUT CONSULT)





- From User Mode To Diagnosis Mode
Diagnosis mode can be activated only when a malfunction is detected, by pressing the driver's door switch at least 5 times within 7 seconds after turning the ignition switch ON. SRS will not enter Diagnosis mode if no malfunction is detected.

- From Diagnosis Mode To User Mode
When in Diagnosis mode, to return to User mode, when a malfunction is detected, turn ignition switch OFF, then back ON and press the driver's door switch at least 5 times within 7 seconds.

HOW TO ERASE SELF DIAGNOSIS RESULTS (WITH CONSULT)





SELF-DIAG [CURRENT]
A current Self-diagnosis result is displayed on the CONSULT screen in real time. After the malfunction is repaired completely, no malfunction is detected on "SELF-DIAG [CURRENT]".

SELF-DIAG [PAST]
Return to the "SELF-DIAG [CURRENT]" CONSULT screen by pushing "BACK" key of CONSULT and select "SELF-DIAG [CURRENT]" in "SELECT DIAG MODE". Touch "ERASE" in "SELF-DIAG [CURRENT]" mode.

NOTE: 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.

TROUBLE DIAG RECORD
The memory of "TROUBLE DIAG RECORD" cannot be erased.

HOW TO ERASE SELF DIAGNOSIS RESULTS (WITHOUT CONSULT)
After a malfunction is repaired, turn ignition switch OFF for at least one second, then back ON. Diagnosis mode returns to User mode. At that time, the problem code is cleared.