SEF543X
IVIS (Infiniti Vehicle Immobilizer System — NATS)
I
If the security indicator lights up with the ignition switch
in the “ON” position or “NATS MALFUNCTION” is dis-
played on “SELF-DIAG RESULTS” screen, perform self-
diagnostic results mode with CONSULT-II using NATS pro-
gram card. Refer to “IVIS (Infiniti Vehicle Immobilizer Sys-
tem — NATS” in EL section.
I
Confirm no self-diagnostic results of NATS is displayed
before touching “ERASE” in “SELF-DIAG RESULTS”
mode with CONSULT-II.
I
When replacing ECM, initialization of NATS system and
registration of all NATS ignition 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 NATS initialization and NATS
ignition key ID registration, refer to CONSULT-II operation
manual, NATS.
OBD System Operation Chart
RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS
I
When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
stored in the ECM memory.
I
When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MIL will come on. For details, refer to “Two Trip Detection Logic” on
EC-49.
I
The MIL will go off after the vehicle is driven 3 times with no malfunction. The drive is counted only when
the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while counting,
the counter will reset.
I
The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A)
without the same malfunction recurring (except for Misfire and Fuel injection system). For Misfire and Fuel
Injection System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times (driv-
ing pattern C) without the same malfunction recurring. The “TIME” IN “SELF-DIAGNOSTIC RESULTS”
mode of CONSULT-II will count the number of times the vehicle is driven.
I
The 1st trip DTC is not displayed when the self-diagnosis results in “OK” for the 2nd trip.
SUMMARY CHART
Items
Fuel Injection System
Misfire
Other
MIL (goes off)
3 (pattern B)
3 (pattern B)
3 (pattern B)
DTC, Freeze Frame Data (no
display)
80 (pattern C)
80 (pattern C)
40 (pattern A)
1st Trip DTC (clear)
1 (pattern C), *1
1 (pattern C), *1
1 (pattern B)
1st Trip Freeze Frame Data
(clear)
*1, *2
*1, *2
1 (pattern B)
For details about patterns “B” and “C” under “Fuel Injection System” and “Misfire”, see EC-71.
For details about patterns “A” and “B” under “Other”, see EC-71.
*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Malfunction Indicator Lamp (MIL) (Cont’d)
EC-69