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TROUBLE DIAGNOSIS
EC-1413
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Major Sensor Reference Graph in Data Monitor ModeEBS011XO
The following are the major sensor reference graphs in “DATA MONITOR” mode.
ACCEL POS SEN, “CKPS·RPM (TDC)”, “MAS AIR/FL SE”
Below is the data for “ACCEL POS SEN”, “CKPS·RPM (TDC)” and “MAS AIR/FL SE” when revving engine
quickly up to 3,000 rpm under no load after warming up engine to the normal operating temperature.
Each value is for reference, the exact value may vary.
SEF321Y
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![NISSAN X-TRAIL 2005 Service Repair Manual EC-1414
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS011XP
Intermittent incidents may occur. In many cases, NISSAN X-TRAIL 2005 Service Repair Manual EC-1414
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS011XP
Intermittent incidents may occur. In many cases,](/manual-img/5/57403/w960_57403-1817.png)
EC-1414
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS011XP
Intermittent incidents may occur. In many cases, the incident resolves itself (the part or circuit function returns
to normal without intervention). It is important to realize that the symptoms described in the customer's com-
plaint often do not recur on DTC visits. Realize also that the most frequent cause of intermittent incidents
occurrences is poor electrical connections. Because of this, the conditions under which the incident occurred
may not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indi-
cate the specific malfunctioning area.
COMMON INTERMITTENT INCIDENTS REPORT SITUATIONS
Diagnostic ProcedureEBS011XQ
1. INSPECTION START
Erase DTCs. Refer to EC-1372, "
HOW TO ERASE DTC" .
>> GO TO 2.
2. CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to EC-1055, "
Ground Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace.
3. SEARCH FOR ELECTRICAL INCIDENT
Perform GI-23, "
How to Perform Efficient Diagnosis for an Electrical Incident" , “INCIDENT SIMULATION
TESTS”.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace.
STEP in Work Flow Situation
II The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than “0”.
III The symptom described by the customer does not recur.
IV DTC does not appear during the DTC Confirmation Procedure.
VI The Diagnostic Procedure for XXXX does not indicate the malfunctioning area.
Page 1819 of 4555
POWER SUPPLY AND GROUND CIRCUIT
EC-1415
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POWER SUPPLY AND GROUND CIRCUITPFP:24110
Wiring DiagramEBS011XS
TBWA0563E
Page 1820 of 4555
![NISSAN X-TRAIL 2005 Service Repair Manual EC-1416
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POWER SUPPLY AND GROUND CIRCUIT
Remarks: Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground ter NISSAN X-TRAIL 2005 Service Repair Manual EC-1416
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POWER SUPPLY AND GROUND CIRCUIT
Remarks: Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground ter](/manual-img/5/57403/w960_57403-1819.png)
EC-1416
[YD (WITHOUT EURO-OBD)]
POWER SUPPLY AND GROUND CIRCUIT
Remarks: Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureEBS011XT
1. INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Yes >> GO TO 6.
No >> GO TO 2.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
1
2
3B
B
BECM ground[Engine is running]
Warm-up condition
Idle speedApproximately 0V
105 G ECM relay (self-shutoff)[Ignition switch ON]
[Ignition switch OFF]
For a few seconds after turning ignition
switch OFFApproximately 1.2V
[Ignition switch OFF]
More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
107
108W/R
W/RIgnition switch [Ignition switch ON]BATTERY VOLTAGE
(11 - 14V)
113 G ECM relay (self-shutoff)[Ignition switch ON]
[Ignition switch OFF]
For a few seconds after turning ignition
switch OFFApproximately 1.2V
[Ignition switch OFF]
More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
114 B ECM ground[Engine is running]
Warm-up condition
Idle speedApproximately 0V
11 9
120Y
RPower supply for ECM[Ignition switch ON]BATTERY VOLTAGE
(11 - 14V)
121 W/LPower supply for ECM
(Back-up)[Ignition switch OFF]BATTERY VOLTAGE
(11 - 14V)
Page 1821 of 4555
POWER SUPPLY AND GROUND CIRCUIT
EC-1417
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2. CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between ECM terminals 107, 108 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector M1
10A fuse
Harness for open or short between ECM and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors. Voltage: Battery voltage
MBIB0610E
Page 1822 of 4555
EC-1418
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POWER SUPPLY AND GROUND CIRCUIT
4. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to EC-1055, "
Ground Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace ground connections.
5. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 1, 2, 3, 114 and body ground. Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to power in harness or connectors.
PBIB2020E
Continuity should exist.
Page 1823 of 4555
![NISSAN X-TRAIL 2005 Service Repair Manual POWER SUPPLY AND GROUND CIRCUIT
EC-1419
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6. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Reconnect ECM harness connector.
3. Tur NISSAN X-TRAIL 2005 Service Repair Manual POWER SUPPLY AND GROUND CIRCUIT
EC-1419
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6. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Reconnect ECM harness connector.
3. Tur](/manual-img/5/57403/w960_57403-1822.png)
POWER SUPPLY AND GROUND CIRCUIT
EC-1419
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6. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Reconnect ECM harness connector.
3. Turn ignition switch ON and then OFF.
4. Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 13.
NG (Battery voltage does not exist)>>GO TO 7.
NG (Battery voltage exists for more then a few seconds)>>GO TO 9.
7. CHECK ECM POWER SUPPLY CIRCUIT-III
1. Disconnect ECM relay.
2. Check voltage between relay terminals 1, 3, 6 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E65, F6
20A fuse
Harness for open or short between ECM relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors. Voltage: After turning ignition switch OFF, battery
voltage will exist for a few seconds, then
drop to approximately 0V.
MBIB0611E
PBIB1899E
Voltage: Battery voltage
PBIB1886E
Page 1824 of 4555
![NISSAN X-TRAIL 2005 Service Repair Manual EC-1420
[YD (WITHOUT EURO-OBD)]
POWER SUPPLY AND GROUND CIRCUIT
9. CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM termina NISSAN X-TRAIL 2005 Service Repair Manual EC-1420
[YD (WITHOUT EURO-OBD)]
POWER SUPPLY AND GROUND CIRCUIT
9. CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM termina](/manual-img/5/57403/w960_57403-1823.png)
EC-1420
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POWER SUPPLY AND GROUND CIRCUIT
9. CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 105, 113 and ECM relay terminal 2. Refer to Wiring
Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 10.
10. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F30, M63
Harness for open or short between ECM and ECM relay.
>> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Check harness continuity between ECM terminal 119 and ECM relay terminal 5, ECM terminal 120 and
ECM relay terminal 7. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 13.
NG >> GO TO 12.
12. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F30, M63
Harness for open or short between ECM and ECM relay.
>> Repair open circuit or short to ground or short to power in harness or connectors.
13. CHECK ECM RELAY
Refer to EC-1423, "
Component Inspection" .
OK or NG
OK >> GO TO 14.
NG >> Replace ECM relay.Continuity should exist.
Continuity should exist.