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TROUBLE DIAGNOSIS
EC-935
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Each value is for reference, the exact value may vary.
SEF321Y
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![NISSAN X-TRAIL 2003 Service Repair Manual EC-936
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS0117J
Intermittent incidents (I/I) may occur. In many cases NISSAN X-TRAIL 2003 Service Repair Manual EC-936
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS0117J
Intermittent incidents (I/I) may occur. In many cases](/manual-img/5/57404/w960_57404-1313.png)
EC-936
[YD (WITH EURO-OBD)]
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS0117J
Intermittent incidents (I/I) 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
complaint often do not recur on (1st/2nd trip) DTC visits. Realize also that the most frequent cause of I/I occur-
rences 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 indicate the
specific malfunctioning area.
COMMON I/I REPORT SITUATIONS
Diagnostic ProcedureEBS0117K
1. INSPECTION START
Erase (1st/2nd trip) DTCs. Refer to EC-895, "
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFOR-
MATION" .
>> GO TO 2.
2. CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to GI-23, "
How to Perform Efficient Diagnosis for an Electrical Incident" , “CIRCUIT INSPECTION”,
“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 (1st/2nd trip) DTC does not appear during the DTC Confirmation Procedure.
VI The Diagnostic Procedure for XXXX does not indicate the malfunctioning area.
Page 1315 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-937
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MAIN POWER SUPPLY AND GROUND CIRCUITPFP:24110
ECM Terminals and Reference ValueEBS0117L
Remarks: Specificat NISSAN X-TRAIL 2003 Service Repair Manual MAIN POWER SUPPLY AND GROUND CIRCUIT
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MAIN POWER SUPPLY AND GROUND CIRCUITPFP:24110
ECM Terminals and Reference ValueEBS0117L
Remarks: Specificat](/manual-img/5/57404/w960_57404-1314.png)
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-937
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MAIN POWER SUPPLY AND GROUND CIRCUITPFP:24110
ECM Terminals and Reference ValueEBS0117L
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.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
1
2
3B
B
BECM ground[Engine is running]
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]
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 1316 of 4179
EC-938
[YD (WITH EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
Wiring DiagramEBS0117M
TBWA0563E
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EC-939
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Diagnostic ProcedureEBS0117N
1. INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Ye s > > G NISSAN X-TRAIL 2003 Service Repair Manual MAIN POWER SUPPLY AND GROUND CIRCUIT
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Diagnostic ProcedureEBS0117N
1. INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Ye s > > G](/manual-img/5/57404/w960_57404-1316.png)
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-939
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Diagnostic ProcedureEBS0117N
1. INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Ye s > > G O T O 5 .
No >> GO TO 2.
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.
4. 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 5.
NG >> Repair open circuit or short to power in harness or connectors.Voltage: Battery voltage
MBIB0610E
Continuity should exist.
Page 1318 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-940
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MAIN POWER SUPPLY AND GROUND CIRCUIT
5. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Reconnect ECM harness connector.
2. Turn ignition switch ON and then OFF.
3. Check voltage be NISSAN X-TRAIL 2003 Service Repair Manual EC-940
[YD (WITH EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
5. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Reconnect ECM harness connector.
2. Turn ignition switch ON and then OFF.
3. Check voltage be](/manual-img/5/57404/w960_57404-1317.png)
EC-940
[YD (WITH EURO-OBD)]
MAIN POWER SUPPLY AND GROUND CIRCUIT
5. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Reconnect ECM harness connector.
2. Turn ignition switch ON and then OFF.
3. 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 6.
NG (Battery voltage exists for more then a few seconds)>>GO TO 8.
6. 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 8.
NG >> GO TO 7.
7. 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
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EC-941
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8. CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness con NISSAN X-TRAIL 2003 Service Repair Manual MAIN POWER SUPPLY AND GROUND CIRCUIT
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8. CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness con](/manual-img/5/57404/w960_57404-1318.png)
MAIN POWER SUPPLY AND GROUND CIRCUIT
EC-941
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8. 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 10.
NG >> GO TO 9.
9. 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.
10. 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 12.
NG >> GO TO 11.
11 . 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.
12. CHECK ECM RELAY
Refer to EC-942, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace ECM relay.Continuity should exist.
Continuity should exist.
Page 1320 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-942
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MAIN POWER SUPPLY AND GROUND CIRCUIT
13. CHECK ECM POWER SUPPLY CIRCUIT-V
Check voltage between ECM terminal 121 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO NISSAN X-TRAIL 2003 Service Repair Manual EC-942
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MAIN POWER SUPPLY AND GROUND CIRCUIT
13. CHECK ECM POWER SUPPLY CIRCUIT-V
Check voltage between ECM terminal 121 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO](/manual-img/5/57404/w960_57404-1319.png)
EC-942
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MAIN POWER SUPPLY AND GROUND CIRCUIT
13. CHECK ECM POWER SUPPLY CIRCUIT-V
Check voltage between ECM terminal 121 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO TO 15.
NG >> GO TO 14.
14. DETECT MALFUNCTIONING PART
Check the following.
20A fuse
Harness connectors E116, M75 (LHD models)
Harness connectors E105, M13 (RHD models)
Harness for open or short between ECM and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
15. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals 1, 2, 3, 114 and body ground. Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 16.
NG >> Repair open circuit or short to power in harness or connectors.
16. CHECK INTERMITTENT INCIDENT
Refer to EC-936, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0117O
ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.
3. If NG, replace ECM relay.Voltage: Battery voltage
MBIB0026E
Continuity should exist.
Condition Continuity
12V direct current supply between ter-
minals 1 and 2Ye s
OFF No
PBIB0077E