Page 1177 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-63
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time afte NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-63
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time afte](/manual-img/5/57402/w960_57402-1176.png)
TROUBLE DIAGNOSIS
EC-63
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning
ignition switch “ON” or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided (CONSULT-
II display)
Just as ignition switch is turned
ON or Start40°C (104°F)
More than approx. 4 minutes after
ignition ON or Start80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cool-
ing fan operates while engine is running.
P0120 Throttle position sensor cir-
cuitECM controls the electric throttle control actuator by regulating the throttle opening to
small range.
Therefore, acceleration will be poor.
Condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration DTC No. Detected items Engine operating condition in fail-safe mode
Page 1178 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-64
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
Basic Inspection
EBS00BMK
1.INSPECTION START
1. Check service records for any recent repairs that may indicate a related problem, or a current need for
sch NISSAN X-TRAIL 2003 Electronic Repair Manual EC-64
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
Basic Inspection
EBS00BMK
1.INSPECTION START
1. Check service records for any recent repairs that may indicate a related problem, or a current need for
sch](/manual-img/5/57402/w960_57402-1177.png)
EC-64
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
Basic Inspection
EBS00BMK
1.INSPECTION START
1. Check service records for any recent repairs that may indicate a related problem, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
–Harness connectors for improper connections
–Wiring harness for improper connections, pinches and cut
–Vacuum hoses for splits, kinks and improper connections
–Hoses and ducts for leaks
–Air cleaner clogging
–Gasket
3. Confirm that electrical or mechanical loads are not applied.
–Headlamp switch is OFF.
–Air conditioner switch is OFF.
–Rear window defogger switch is OFF.
–Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no-
load.
6. Make sure that no DTC is displayed with CONSULT-II or GST.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.
>> GO TO 3
SEF983U
SEF976U
SEF977U
Page 1179 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-65
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
3.CHECK TARGET IDLE SPEED
With CONSULT-II
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,00 NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-65
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
3.CHECK TARGET IDLE SPEED
With CONSULT-II
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,00](/manual-img/5/57402/w960_57402-1178.png)
TROUBLE DIAGNOSIS
EC-65
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
3.CHECK TARGET IDLE SPEED
With CONSULT-II
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no-
load, then run engine at idle speed for about 1 minute.
3. Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Wi t h ou t C O N S U LT-I I
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed for about
1 minute.
3. Check idle speed.
OK or NG
OK >> GO TO 10.
NG >> GO TO 4.
4.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. PerformEC-31, "
Accelerator Pedal Released Position Learning".
>> GO TO 5.
5.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
1. Stop engine.
2. PerformEC-31, "
Throttle Valve Closed Position Learning".
>> GO TO 6.
SEF978U
M/T: 650±50 rpm
A/T: 700±50 rpm (in "P" or "N" position)
SEF058Y
M/T: 650±50 rpm
A/T: 700±50 rpm (in "P" or "N" position)
Page 1180 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-66
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
6.PERFORM IDLE AIR VOLUME LEARNING
Refer toEC-31, "
Idle Air Volume Learning".
CMPLT or INCMP
CMPLT>>GOTO7.
INCMP >> 1. Follow the construction of “Idle NISSAN X-TRAIL 2003 Electronic Repair Manual EC-66
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
6.PERFORM IDLE AIR VOLUME LEARNING
Refer toEC-31, "
Idle Air Volume Learning".
CMPLT or INCMP
CMPLT>>GOTO7.
INCMP >> 1. Follow the construction of “Idle](/manual-img/5/57402/w960_57402-1179.png)
EC-66
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
6.PERFORM IDLE AIR VOLUME LEARNING
Refer toEC-31, "
Idle Air Volume Learning".
CMPLT or INCMP
CMPLT>>GOTO7.
INCMP >> 1. Follow the construction of “Idle Air Volume Learning”.
2. GO TO 4.
7.CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
OK or NG
OK >> GO TO 10.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the Following.
lCheck camshaft position sensor (PHASE) and circuit. Refer toEC-223.
lCheck crankshaft position sensor (POS) and circuit. Refer toEC-217.
OK or NG
OK >> GO TO 9.
NG >> 1. Repair or replace.
2. GO TO 4.
9.CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but
this is the rarely the case.)
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer toEC-48, "
NATS
(Nissan Anti-theft System)".
>> GO TO 4. Which is the result CMPLT or INCMP
M/T: 650±50 rpm
A/T: 700±50 rpm (in "P" or "N" position)
M/T: 650±50 rpm
A/T: 700±50 rpm (in "P" or "N" position)
Page 1181 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-67
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
10.CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
OK or NG
OK >>INSPECTION END
NG >> NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-67
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
10.CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
OK or NG
OK >>INSPECTION END
NG >>](/manual-img/5/57402/w960_57402-1180.png)
TROUBLE DIAGNOSIS
EC-67
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
10.CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
OK or NG
OK >>INSPECTION END
NG >> GO TO 11.
11 .PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. PerformEC-31, "
Accelerator Pedal Released Position Learning".
>> GO TO 12.
12.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
1. Stop engine.
2. PerformEC-31, "
Throttle Valve Closed Position Learning".
>> GO TO 13.
13.PERFORM IDLE AIR VOLUME LEARNING
Refer toEC-31, "
Idle Air Volume Learning".
CMPLT or INCMP
CMPLT>>GOTO14.
INCMP >> 1. Follow the construction of “Idle Air Volume Learning”.
2. GO TO 4.
14.CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Wi t h ou t C O N S U LT-I I
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
OK or NG
OK >> GO TO 15.
NG >> GO TO 17.M/T: 14±5°BTDC
A/T: 16±5°BTDC (in "P" or "N" position)
Which is the result CMPLT or INCMP
M/T: 650±50 rpm
A/T: 700±50 rpm (in "P" or "N" position)
M/T: 650±50 rpm
A/T: 700±50 rpm (in "P" or "N" position)
Page 1182 of 3066
EC-68
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
15.CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light.
OK or NG
OK >>INSPECTION END
NG >> GO TO 16.
16.CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer toEM-43, "
TIMING CHAIN".
OK or NG
OK >> GO TO 17.
NG >> 1. Repair the timing chain installation.
2. GO TO 4.
17.DETECT MALFUNCTIONING PART
Check the following.
lCheck camshaft position sensor (PHASE) and circuit. Refer toEC-223.
lCheck crankshaft position sensor (POS) and circuit. Refer toEC-217.
OK or NG
OK >> GO TO 18.
NG >> 1. Repair or replace.
2. GO TO 4.
18.CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but
this is the rarely the case.)
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer toEC-48, "
NATS
(Nissan Anti-theft System)".
>> GO TO 4. M/T: 14±5°BTDC
A/T: 16±5°BTDC (in "P" or "N" position)
Page 1183 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-69
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Symptom Matrix ChartEBS00BML
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGIN NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
EC-69
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Symptom Matrix ChartEBS00BML
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGIN](/manual-img/5/57402/w960_57402-1182.png)
TROUBLE DIAGNOSIS
EC-69
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Symptom Matrix ChartEBS00BML
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit 1 1 2 3 2 2 2 3 2EC-352
Fuel pressure regulator system 3 3 4 4 4 4 4 4 4 4EC-34
Injector circuit 1 1 2 3 2 2 2 2EC-343
Evaporativeemissionsystem 334444444 4EC-372
Air Positive crankcase ventilation sys-
tem334444444 41EC-375
Incorrect idle speed adjustment 3 3 1 1 1 1 1EC-64
Electric throttle control actuator 1 1 2 3 3 2 2 2 2 2 2EC-271
,
EC-273
,
EC-279
Ignition Incorrect ignition timing adjustment 3 3 1 1 1 1 1 1EC-64
Ignition circuit 1 1 2 2 2 2 2 2EC-334
Main power supply and ground circuit 2 2 3 3 3 3 3 2 3EC-108
Mass air flow sensor circuit 1 1 2 2 2 2 2 2EC-130,
EC-260
Engine coolant temperature sensor circuit 1 1 2 2 2 3 2 2 3 1 2EC-141
Throttle position sensor circuit 1 2 2 2 2 2 2 2EC-146
Accelerator pedal position sensor circuit 3 2 1 2 2EC-154
Heated oxygen sensor 1 circuit 1 2 3 2 2 2 2EC-160
,
EC-166
,
EC-174
,
EC-284
,
EC-290
Knock sensor circuit 2 2 3EC-212
Crankshaft position sensor (POS) circuit 2 2EC-217
Camshaft position sensor (PHASE) circuit 2 2EC-223
Vehicle speed signal circuit 2 3 3 3EC-239
Power steering pressure sensor circuit 2 3 3 3 3EC-244
ECM 22333333333EC-249,
EC-256
Intake valve timing control solenoid valve cir-
cuit332 13223 3EC-117,
EC-266
Page 1184 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual EC-70
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYSTEM — ENGINE MECHANICAL & OTHER
PNP switch circuit 3 3 3 3 3 3 3EC-325
S NISSAN X-TRAIL 2003 Electronic Repair Manual EC-70
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYSTEM — ENGINE MECHANICAL & OTHER
PNP switch circuit 3 3 3 3 3 3 3EC-325
S](/manual-img/5/57402/w960_57402-1183.png)
EC-70
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYSTEM — ENGINE MECHANICAL & OTHER
PNP switch circuit 3 3 3 3 3 3 3EC-325
Start signal circuit 2EC-348
Refrigerant pressure sensor circuit 2 3 3 3 3 4EC-359
Electrical load signal circuit 3 3 3 3EC-363
Airconditionercircuit 223333333 3 2AT C -3 0
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank
5
5FL-9
Fuel piping 5 5 5 5 5 5FL-3,EM-
29
Va p o r lo c k—
Valve deposit
555555 5—
Poor fuel (Heavy weight gaso-
line, Low octane)—