Description of On-Board Diagnostics

CAUTION:
- Do not use a circuit tester to check SRS harness connectors unless instructed to in this Service Manual. SRS wiring harnesses can be identified with yellow harness protector or yellow insulation tape before the harness connectors.
- 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:

DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using "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 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 (also indicated by the warning lamp flashes in the Diagnosis mode) are displayed on the CONSULT screen. The stored results are not erased 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:

- "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.

For NISSAN MODEL A32, the diagnosis sensor unit classification number assigned is 6B.

HOW TO CHANGE SELF-DIAGNOSIS MODE With CONSULT

From User Mode To Diagnosis Mode:

From User Mode To Diagnosis Mode
After selecting AIR BAG on the "SELECT SYSTEM" screen, User mode automatically changes to Diagnosis mode.

From Diagnosis Mode To User Mode:

From Diagnosis Mode To User Mode
To return to User mode from diagnosis mode, touch "BACK" key of CONSULT until "SELECT SYSTEM" appears. Diagnosis mode automatically changes to User mode.