Nissan Terrano model r20 series 2004. Manual — part 78
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If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
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Erasing the emission-related diagnostic information using CONSULT-II is easier and quicker than
switching the diagnostic test mode using the data link connector.
NATS (Nissan Anti-Theft System)
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If the security indicator lights up with the ignition switch in
the “ON” position or “NATS MALFUNCTION” is displayed
on “SELF-DIAG RESULTS” screen, perform self-diagnostic
results mode with CONSULT-II using NATS program card.
Refer to “NATS (Nissan Anti-Theft System)” in EL section.
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Confirm no self-diagnostic results of NATS is displayed
before touching “ERASE” in “SELF-DIAG RESULTS” mode
with CONSULT-II.
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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.
Malfunction Indicator (MI)
DESCRIPTION
The MI is located on the instrument panel.
1. The MI will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
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If the MI does not light up, refer to EL section (“WARNING
LAMPS AND CHIME”) or see EC-310.
2. When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has
detected an engine system malfunction.
If MI illuminates or blinks irregularly after starting engine,
water may have accumulated in fuel filter. Drain water from
fuel filter. Refer to MA section.
SEF252Z
SAT652J
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
Diagnostic Trouble Code (DTC) (Cont’d)
EC-34
On board diagnostic system function
The on board diagnostic system has the following three functions.
Diagnostic Test Mode
KEY and ENG. Status
Function
Explanation of Function
Mode I
Ignition switch in ON
position
Engine stopped
BULB CHECK
This function checks the MI bulb for damage
(blown, open circuit, etc.).
If the MI does not come on, check MI circuit.
(See EC-310.)
Engine running
MALFUNCTION
WARNING
This is a usual driving condition. When ECM
detects a malfunction, the MI will light up to
inform the driver that a malfunction has been
detected.
Mode II
Ignition switch in ON
position
Engine stopped
SELF-DIAGNOSTIC RESULTS
This function allows DTCs to be read.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
Malfunction Indicator (MI) (Cont’d)
EC-35
How to switch diagnostic test modes
*1: EC-310
*2: EC-35
*3: EC-310
YEC252A
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
Malfunction Indicator (MI) (Cont’d)
EC-36
Diagnostic test mode I — Bulb check
In this mode, the MI on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EL
section, “WARNING LAMPS AND CHIME” or see EC-310.
Diagnostic test mode I — Malfunction warning
MI
Condition
ON
When the malfunction is detected or the ECM’s CPU is malfunctioning.
OFF
No malfunction.
Diagnostic test mode II — Self-diagnostic results
In this mode, DTC is indicated by the number of blinks of the MI as shown below.
Long (0.6 second) blinking indicates the two LH digits of number and short (0.3 second) blinking indicates the
two RH digits of number. For example, the MI blinks 10 times for 6 seconds (0.6 sec x 10 times) and then it
blinks three times for about 1 second (0.3 sec x 3 times). This indicates the DTC “1003”.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC “0505” refers to no
malfunction. (See TROUBLE DIAGNOSIS — INDEX, EC-7.)
How to erase diagnostic test mode II (Self-diagnostic results)
The DTC can be erased from the backup memory in the ECM when the diagnostic test mode is changed from
Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to “How to Switch Diagnostic Test Modes”, EC-36.)
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If the battery terminal is disconnected, the DTC will be lost from the backup memory within 24
hours.
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Be careful not to erase the stored memory before starting trouble diagnoses.
SEF298QA
SEF162PB
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ZD30DDTi
Malfunction Indicator (MI) (Cont’d)
EC-37
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