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2. Perform “SELF-DIAGNOSTIC PROCEDURE (Without CONSULT-II)” in AT section titled “TROUBLE
DIAGNOSIS”, “Self-diagnosis”. (The engine warm-up step can be skipped when performing the diagnosis
only to erase the DTC.)
3. Select Mode 4 with GST (Generic Scan Tool).
The emission related diagnostic information in the ECM can be erased by selecting Mode 4 with GST.
I If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
I The following data are cleared when the ECM memory is erased.
1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) System readiness test (SRT) codes
6) Test values
7) Others
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but
all of the data listed above, are cleared from the ECM memory during work procedures.
NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM — NATS)
NFEC0031S08
SEF515Y
I If the security indicator lights up with the ignition switch in the “ON” position or “NATS MALFUNC-
TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with
CONSULT-II using NATS program card. Refer to “NVIS (Nissan Vehicle Immobilizer System —
NATS)” EL-356.
I Confirm no self-diagnostic results of NVIS (NATS) is displayed before touching “ERASE” in “SELF-
DIAG RESULTS” mode with CONSULT-II.
I When replacing ECM, initialization of NVIS (NATS) system and registration of all NVIS (NATS) igni-
tion key IDs must be carried out with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of NVIS (NATS)
initialization and NVIS (NATS) ignition key ID registration, refer to CONSULT-II operation manual,
IVIS/NVIS.
Malfunction Indicator Lamp (MIL)
NFEC1189
DESCRIPTION
NFEC1189S01
The MIL is located on the instrument panel.
1. The MILwill light up when the ignition switch is turned ON without the engine running. This is a bulb check.
I IftheMILdoesnotlightup,referto“WARNING LAMPS”,EL-136orseeDTCP0650MIL(CIRCUIT),EC-457.
2. When the engine is started, the MIL should go off. If the MIL remains on, the on board diagnostic system
has detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont’d)
EC-92
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