2003 NISSAN X-TRAIL engine

TROUBLE DIAGNOSIS
EC-1227
[YD (WITHOUT EURO-OBD)]
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TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionEBS011XD
INTRODUCTION
The engine has an ECM to control major systems such as fuel injec-
tion control, fuel injection timing control, glow control system, etc.
The ECM accepts input signals from sensors and instantly actuators.
It is essential that both input and output signals are proper and sta-
ble. At the same time, it is important that there are no malfunctions
such as vacuum leaks, or other malfunctions with the engine.
It is much more difficult to diagnose a malfunction that occurs inter-
mittently rather than continuously. Most intermittent malfunctions are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the EC-1228, "
WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on next page should be used.
Start your diagnosis by looking for conventional incidents first. This
will help troubleshoot driveability incidents on an electronically con-
trolled engine vehicle.
MEF036D
SEF233G
SEF234G

TROUBLE DIAGNOSIS
EC-1229
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Description for Work Flow
DIAGNOSTIC WORK SHEET
There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about an incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the one shown below in order to
organize all the information for troubleshooting.
STEP DESCRIPTION
STEP IGet detailed information about the conditions and the environment when the incident/symptom occurred using the
EC-1229, "
DIAGNOSTIC WORK SHEET" .
STEP IIBefore confirming the concern, check and write down (print out using CONSULT-II) the DTC and the freeze frame
data, then erase the DTC. The DTC and the freeze frame data can be used when duplicating the incident at STEP III
& IV. Refer to EC-1223
.
If the incident cannot be verified, perform EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
Study the relationship between the cause, specified by DTC, and the symptom described by the customer. (The
Symptom Matrix Chart will be useful. Refer toEC-1235
) Also check related service bulletins for information.
STEP IIITry to confirm the symptom and under what conditions the incident occurs.
The DIAGNOSTIC WORK SHEET and the freeze frame data are useful to verify the incident. Connect CONSULT-II to
the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results.
If the incident cannot be verified, perform EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
If the malfunction code is detected, skip STEP IV and perform STEP V.
STEP IVTry to detect the DTC by driving in (or performing) the DTC Confirmation Procedure. Check and read the DTC and the
freeze frame data by using CONSULT-II.
During the DTC verification, be sure to connect CONSULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode
and check real time diagnosis results.
If the incident cannot be verified, perform EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
In case the DTC Confirmation Procedure is not available, perform the Overall Function Check instead. The DTC can-
not be displayed by this check, however, this simplified check is an effective alternative.
The “NG” result of the Overall Function Check is the same as the DTC detection.
STEP VTake the appropriate action based on the results of STEP I through IV.
If the malfunction code is indicated, proceed to Trouble Diagnosis for DTC PXXXX.
If the normal code is indicated, proceed to the Basic Inspection, EC-1231
. Then perform inspections according to the
Symptom Matrix Chart. Refer to EC-1235
.
STEP VIIdentify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect the
system for mechanical binding, loose connectors or wiring damage using (tracing) Harness Layouts.
Gently shake the related connectors, components or wiring harness with CONSULT-II set in “DATA MONITOR (AUTO
TRIG)” mode.
Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CONSULT-II.
Refer to EC-1245
or EC-1257 .
The Diagnostic Procedure in EC section contains a description based on open circuit inspection. A short circuit
inspection is also required for the circuit check in the Diagnostic Procedure. For details, refer to GI-23, "
How to Per-
form Efficient Diagnosis for an Electrical Incident" , “Circuit Inspection”.
Repair or replace the malfunction parts.
If the malfunctioning part cannot be detected, perform EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT" .
STEP VIIOnce you have repaired the circuit or replaced a component, you need to run the engine in the same conditions and
circumstances which resulted in the customer's initial complaint.
Perform the DTC Confirmation Procedure and confirm the normal code (DTC P0000) is detected. If the incident is still
detected in the final check, perform STEP VI by using a different method from the previous one.
Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) DTC in ECM. (Refer to
EC-1223
.)
SEF907L

TROUBLE DIAGNOSIS
EC-1231
[YD (WITHOUT EURO-OBD)]
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Basic InspectionEBS011XF
Precaution:
Perform Basic Inspection without electrical or mechanical loads applied;

Headlamp switch is OFF.

On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light
only small lamps.

Air conditioner switch is OFF.

Rear defogger switch is OFF.

Steering wheel is in the straight-ahead position, etc.
Priority Detected items (DTC)
1

U1000 CAN communication line

P0016 Crankshaft position - camshaft position correlation

P0102 P0103 Mass air flow sensor

P0112 P0113 Intake air temperature sensor

P0117 P0118 Engine coolant temperature sensor

P0122 P0123 P0222 P0223 P2135 Accelerator pedal position sensor

P0182 P0183 Fuel pump temperature sensor

P0192 P0193 Fuel rail pressure sensor

P0237 P0238 Turbocharger boost sensor

P0335 P0336 Crankshaft position sensor

P0340 P0341 Camshaft position sensor

P0563 Battery voltage

P0605 P0606 ECM

P0642 P0643 P0652 P0653 Sensor power supply

P1260 - P1267 Fuel injector adjustment resistor

P1610 - P1617 NATS

P2228 P2229 Barometric pressure sensor
2

P0089 P0628 P0629 P1272 - P1275 Fuel pump

P0200 - P0204 P1268 - P1271 P2146 - P2149 Fuel injector

P0686 ECM relay

P1212 TCS communication line
3

P0088 P0093 Fuel system

P0217 Engine over temperature (OVERHEAT)

P0234 Turbocharger system

P1211 TCS control unit

EC-1232
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

1. INSPECTION START
1. Check service records for any recent repairs that may indicate a related incident.
2. Check the current need for scheduled maintenance, especially for fuel filter and air cleaner filter. Refer to
MA-7, "
PERIODIC MAINTENANCE" .
3. Open engine hood and check the following:
–Harness connectors for improper connections
–Vacuum hoses for splits, kinks, or improper connections
–Wiring for improper connections, pinches, or cuts
4. Start engine and warm it up to the normal operating tempera-
ture.
>> GO TO 2.
2. PREPARATION FOR CHECKING IDLE SPEED
With CONSULT-II
Connect CONSULT-II to the data link connector.
>> GO TO 3.
3. CHECK IDLE SPEED
With CONSULT-II
1. Select “CKPS·RPM (TDC)” in “DATA MONITOR” mode with CONSULT-II.
2. Read idle speed.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
4. CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace.
SEF142I
725±25 rpm
SEF817Y

TROUBLE DIAGNOSIS
EC-1233
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5. BLEED AIR FROM FUEL SYSTEM
1. Stop engine.
2. Use priming pump to bleed air from fuel system. Refer to EC-1221, "
AIR BLEEDING" .
>> GO TO 6.
6. CHECK IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and let it idle.
2. Select “CKPS·RPM (TDC)” in “DATA MONITOR” mode with CONSULT-II.
3. Read idle speed.
OK or NG
OK >>INSPECTION END
NG >> GO TO 7.
7. DRAIN WATER FROM FUEL FILTER
Drain water from fuel filter. Refer to EC-1221, "
WATER DRAINING" .
>> GO TO 8.
8. CHECK IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and let it idle.
2. Select “CKPS·RPM (TDC)” in “DATA MONITOR” mode with CONSULT-II.
3. Read idle speed.
OK or NG
OK >>INSPECTION END
NG >> GO TO 9.
9. CHECK AIR CLEANER FILTER
Check air cleaner filter for clogging or breaks.
OK or NG
OK >> GO TO 10.
NG >> Replace air cleaner filter.725±25 rpm
SEF817Y
725±25 rpm
SEF817Y

EC-1234
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

10. CHECK BATTERY VOLTAGE
Check battery voltage.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 . CHECK BATTERY
Refer to SC-3, "
BATTERY" .
OK or NG
OK >> Check charging system. Refer to SC-12 .
NG >> Repair or replace.
12. CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-196, "
CHECKING COMPRESSION PRESSURE" .
OK or NG
OK >> GO TO 11.
NG >> Follow the instruction of “CHECKING COMPRESSION PRESSURE”.
13. CHECK IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and let it idle.
2. Select “CKPS·RPM (TDC)” in “DATA MONITOR” mode with CONSULT-II.
3. Read idle speed.
OK or NG
OK >>INSPECTION END
NG >> 1. Replace fuel injector.
2. GO TO 3. Voltage: More than 12.13V
725±25 rpm
SEF817Y

TROUBLE DIAGNOSIS
EC-1235
[YD (WITHOUT EURO-OBD)]
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Symptom Matrix ChartEBS011XG
SYSTEM — Basic engine control systemSYMPTOM
Reference page
HARD/NO START/RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT KNOCK/DETONATION
LACK OF POWER POOR ACCELERATION HI IDLE LOW IDLE
NO START (with first firing) NO START (without first firing) HARD TO START WHEN ENGINE IS COLD HARD TO START WHEN ENGINE IS HOT
AT I D L E DURING DRIVING WHEN DECELERATING
Warranty symptom code AA AB AC AD AE AF
Fuel pump 55555555 55 5 —
Fuel injector 3333333334433EC-1314
Glow control system 1 1 1 1 1EC-1457
Engine body 3333333 344 3EM-208
Fuel transport pump 2 2 2EC-1487
EGR system33EC-1465
Air cleaner and duct33EM-133
Fuel rail pressure relief valveEC-1277
ENGINE CONTROLFuel pump circuit 4 4 4 4 4 4 4 4 4 4 4EC-1382
Fuel injector circuit 1111111111111EC-1314
Mass air flow sensor circuit 1 1 1EC-1280
Engine coolant temperature circuit 1 1 1 1EC-1291
Vehicle speed signal circuit1LAN-4
Accelerator pedal position sensor circuit 1 1 1EC-1297
Fuel rail pressure sensor circuitEC-1307

EC-1236
[YD (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS

1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Crankshaft position sensor circuit 1 1 1 1 1 1 1 1 1 1EC-1351
Camshaft position sensor circuit 3 3EC-1363
Turbocharger boost sensor circuit 1 1 1EC-1471
Turbocharger boost control solenoid
valve circuit111EC-1471
Start signal circuit 1 1 1 1 1 1 1 1 1EC-1496
Ignition switch circuit 1 1 1 1EC-1261
Power supply for ECM circuit 1 1 1 1EC-1261
Cooling fan relay circuitEC-1320
EGR volume control valve circuit 1 1 1EC-1465
Glow relay circuit 1 1 1 1EC-1457
ECM relay (Self-shutoff) circuit 1 1 1 1EC-1399
ECM, connector circuit 2 2 2 2 2 2 2 2 2 2 2 2 2EC-1378,
EC-1455
NATS (Nissan Anti-theft System) 1EC-1224
SYSTEM — Basic engine control systemSYMPTOM
Reference page
HARD/NO START/RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT KNOCK/DETONATION LACK OF POWER POOR ACCELERATION HI IDLE
LOW IDLE
NO START (with first firing) NO START (without first firing)
HARD TO START WHEN ENGINE IS COLD HARD TO START WHEN ENGINE IS HOT AT I D L E DURING DRIVING WHEN DECELERATING
Warranty symptom code AA AB AC AD AE AF