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Page 1771 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual ENGINE CONTROL SYSTEM
EC-1367
[YD (WITHOUT EURO-OBD)]
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4WD Models With ESP
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
T: Transmit R: Receive Glow indicator lamp signal T R
A

Page 1772 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-1368
[YD (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

2WD Models Without ESP
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
T: Transmit R: Receive
SKIA9999E
Signals ECM ABS actuator and electric unit (c

Page 1773 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual ENGINE CONTROL SYSTEM
EC-1369
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2WD Models With ESP
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
T: Transmit R: Receive
PKIC0343E
Signals ECM ESP/TCS/AB

Page 1777 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-1373
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If the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-1373
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If the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.
The following data are cleared when the ECM memory is erased.
–Diagnostic trouble codes
–Freeze frame data
–Fuel pump learning value
–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.
Freeze Frame DataEBS011XA
The ECM records the driving conditions such as calculated load value, engine coolant temperature, engine
speed, vehicle speed and intake manifold pressure at the moment a malfunction is detected.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II. For
details, see EC-1407
.
Only one set of freeze frame data can be stored in the ECM. If freeze frame data is stored in the ECM memory
and another freeze frame data occurs later, the first (original) freeze frame data remains unchanged in the
ECM memory.
Freeze frame data (along with the DTCs) are cleared when the ECM memory is erased. Procedures for clear-
ing the ECM memory are described in EC-1372, "
HOW TO ERASE DTC" .
NATS (Nissan Anti-theft System)EBS011XB
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 BL section.
Confirm no self-diagnostic results of NATS is displayed
before touching "ERASE" in "SELF-DAIG RESULTS" mode
with CONSULT-II.
When replacing ECM, initialization of NATS system and reg-
istration 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 procedure of NATS initialization and NATS ignition key ID registration, refer to CON-
SULT-II operation manual, NATS.
Malfunction Indicator (MI)EBS01F88
DESCRIPTION
The MI is located on the instrument panel.
1. The MI will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
If the MI does not light up, refer to EC-1699, "MI & DATA LINK
CONNECTORS" .
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.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
SEF543X
SAT652J

Page 1786 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-1382
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

Basic InspectionEBS011XF
Precaution:
Perform Basic Inspection without electrical or mechanical loads applied;
Headlamp switch is OFF.
On vehicles

Page 1791 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual TROUBLE DIAGNOSIS
EC-1387
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Symptom Matrix ChartEBS011XG
SYSTEM — Basic engine control systemSYMPTOM
Reference page
HARD/NO START/RESTART (EXCP. HA)

Page 1793 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual TROUBLE DIAGNOSIS
EC-1389
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SYSTEM — Basic engine control systemSYMPTOM
Reference page
ROUGH IDLE/HUNTING IDLING VIBRATION
SLOW/NO RETURN TO IDLE OV

Page 1794 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-1390
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

1 - 5: The numbers refer to the order of inspection.
ENGINE CONTROLCrankshaft position sensor circuit 1 1 1 1EC-1512
Camshaft position sensor circui

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