NISSAN X-TRAIL 2001 Service Repair Manual

TROUBLE DIAGNOSIS
EC-1411
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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-1411, "
DIAGNOSTIC WORK SHEET" .
STEP IIBefore confirming the concern, check and write down (print out using CONSULT-II) the DTC, then erase the DTC.
Refer to EC-1406
.
If the incident cannot be verified, perform EC-1441, "
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 to EC-1416
.) Also check related service bulletins for information.
STEP IIITry to confirm the symptom and under what conditions the incident occurs.
The “DIAGNOSTIC WORK SHEET” is 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-1441, "
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 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-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
In case the “DTC Confirmation Procedure” is not available, perform the “Overall Function Check” instead. The DTC
cannot 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-1412
. Then perform inspections according to the
Symptom Matrix Chart. Refer to EC-1416
.
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-1425
or EC-1437 .
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-1441, "
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-1406
.)
SEF907L

EC-1412
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TROUBLE DIAGNOSIS
Worksheet Sample
Basic InspectionEBS0037E
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.
MTBL0533

TROUBLE DIAGNOSIS
EC-1413
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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

EC-1414
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TROUBLE DIAGNOSIS
5. BLEED AIR FROM FUEL SYSTEM
1. Stop engine.
2. Use priming pump to bleed air from fuel system. Refer to EC-1404, "
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-1404, "
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

TROUBLE DIAGNOSIS
EC-1415
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EC
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-182, "
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

EC-1416
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TROUBLE DIAGNOSIS
Symptom Matrix Chart
EBS0037F
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 supply pump 5 5 5 5 5 5 5 5 5 5 5 —
Fuel injector 3 3 3 3 3 3 3 3 3 4 4 3 3EC-1472
EDU (Electronic drive unit) 4 4 4 4 4 4 4 4 4 5 5 4 4EC-1501
Glow control system 1 1 1 1 1EC-1544
Engine body 3 3 3 3 3 3 3 3 4 4 3EM-110
EGR system33EC-1551
Air cleaner and duct33MA-32
Fuel pressure relief valveEC-1405
ENGINE CONTROL
Suction control valve circuit 4 4 4 4 4 4 4 4 4 4 4EC-1519
Fuel injector circuit 1 1 1 1 1 1 1 1 1 1 1 1 1EC-1472
EDU circuit 2222222222222EC-1501
Mass air flow sensor circuit 1 1 1EC-1451
Engine coolant temperature circuit 1 1 1 1EC-1456
Vehicle speed sensor circuit 1EC-1489
Accelerator pedal position sensor circuit 1 1 1EC-1460
Accelerator pedal released position
switch circuit111111EC-1531
Common rail fuel pressure sensor
circuitEC-1468
Crankshaft position sensor (TDC)
circuit1111111111EC-1479

TROUBLE DIAGNOSIS
EC-1417
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EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuit 3 3EC-1484
Start signal circuit 1 1 1 1 1 1 1 1 1EC-1566
Ignition switch circuit 1 1 1 1EC-1442
Power supply for ECM circuit 1 1 1 1EC-1442
Cooling fan relay circuitEC-1508
EGR volume control valve circuit 1 1 1EC-1551
Glow relay circuit 1 1 1 1EC-1544
ECM relay (Self-shutoff) circuit 1 1 1 1EC-1538
ECM, connector circuit 2 2 2 2 2 2 2 2 2 2 2 2 2EC-1494,
EC-1536
Air conditioner relay circuit 1 1EC-1572
Air conditioner switch circuitEC-1572
NATS (Nissan Anti-theft System) 1EC-1406
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

EC-1418
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TROUBLE DIAGNOSIS
SYSTEM — Basic engine control systemSYMPTOM
Reference page
ROUGH IDLE/HUNTING IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE EXCESSIVE FUEL CONSUMPTION EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR
DEAD BATTERY (UNDER CHARGE) Malfunction indicator illuminates. Can be detected by CONSULT-II?
BLACK SMOKE WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA
Fuel supply pump 5 5 5 5 1 1 —
Fuel injector 3 3 3 4 4 4 1 1EC-1472
EDU (Electronic drive unit) 4 4 4 5 5 5 1 1EC-1501
Glow system1EC-1544
Engine body 3 3 3 3 1 3EM-110
EGR system3EC-1551
Air cleaner and duct3MA-32
Fuel pressure relief valveEC-1405
ENGINE CONTROL
Suction control valve circuit 4 4 4 4 1 1EC-1519
Fuel injector circuit 1 1 1 1 1 1 1 1EC-1472
EDU circuit 2 2 2 2 2 2 1 1EC-1501
Mass air flow sensor circuit 1 1 1EC-1451
Engine coolant temperature circuit 1 1 1 1 1EC-1456
Vehicle speed sensor circuit11EC-1489
Accelerator pedal position sensor circuit 1 1 1EC-1460
Accelerator pedal released position switch
circuit11EC-1531
Common rail fuel pressure sensor
circuit11EC-1468
Crankshaft position sensor (TDC)
circuit11 11EC-1479

TROUBLE DIAGNOSIS
EC-1419
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EC
1 - 5: The numbers refer to the order of inspection.
(continued on next page)
ENGINE CONTROL
Camshaft position sensor circuitEC-1484
Start signal circuitEC-1566
Ignition switch circuitEC-1442
Power supply for ECM circuit11EC-1442
Cooling fan relay circuit 2EC-1508
EGR volume control valve circuit 1EC-1551
Glow relay circuit1EC-1544
ECM relay (Self-shutoff) circuit1EC-1538
ECM, connector circuit 2 2 2 2 2 2 2 2 2 2 2EC-1494,EC-
1536
Air conditioner relay circuitEC-1572
Air conditioner switch circuitEC-1572
NATS (Nissan Anti-theft System)1EC-1406
SYSTEM — Basic engine control systemSYMPTOM
Reference page
ROUGH IDLE/HUNTING IDLING VIBRATION
SLOW/NO RETURN TO IDLE OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION ABNORMAL SMOKE COLOR DEAD BATTERY (UNDER CHARGE) Malfunction indicator illuminates. Can be detected by CONSULT-II?
BLACK SMOKE WHITE SMOKE
Warranty symptom code AG AH AJ AK AL AM AP HA

EC-1420
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TROUBLE DIAGNOSIS
Engine Control Component Parts Location
EBS00372
PBIB0383E