Page 945 of 4179
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-567
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Diagnostic ProcedureEBS010XJ
SEF613ZD
Page 946 of 4179
EC-568
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
SEF768Z
Page 947 of 4179
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-569
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SEF615ZA
Page 948 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-570
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS010XK
Intermittent incidents (I/I) may occur. In many ca NISSAN X-TRAIL 2003 Service Repair Manual EC-570
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS010XK
Intermittent incidents (I/I) may occur. In many ca](/manual-img/5/57404/w960_57404-947.png)
EC-570
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TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTPFP:00006
DescriptionEBS010XK
Intermittent incidents (I/I) may occur. In many cases, the malfunction 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 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 ProcedureEBS010XL
1. INSPECTION START
Erase (1st trip) DTCs. Refer to EC-514, "
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMA-
TION" .
>> 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" , “Incident Simulation Tests”,
“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] or [1t].
III The symptom described by the customer does not recur.
IV (1st trip) DTC does not appear during the DTC Confirmation Procedure.
VI The Diagnostic Procedure for PXXXX does not indicate the malfunctioning area.
Page 949 of 4179
POWER SUPPLY AND GROUND CIRCUIT
EC-571
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POWER SUPPLY AND GROUND CIRCUITPFP:24110
Wiring DiagramEBS010XM
TBWA0594E
Page 950 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-572
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POWER SUPPLY AND GROUND CIRCUIT
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals whe NISSAN X-TRAIL 2003 Service Repair Manual EC-572
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POWER SUPPLY AND GROUND CIRCUIT
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals whe](/manual-img/5/57404/w960_57404-949.png)
EC-572
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POWER SUPPLY AND GROUND CIRCUIT
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 ProcedureEBS010XN
1. INSPECTION START
Start engine.
Is engine running?
Ye s o r N o
Yes >> GO TO 11.
No >> GO TO 2.
2. CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF and then ON.
2. Check voltage between ECM terminal 109 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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
1 B ECM ground[Engine is running]
Idle speedBody ground
109 B/R Ignition switch[Ignition switch: OFF]0V
[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
111 G / WECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
For a few seconds after turning ignition switch OFF0 - 1.0V
[Ignition switch: OFF]
More than a few seconds after turning ignition switch
OFFBATTERY VOLTAGE
(11 - 14V)
11 5
11 6B
BECM ground[Engine is running]
Idle speedBody ground
11 9
120SB
GYPower supply for
ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
Voltage: Battery voltage
MBIB0015E
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POWER SUPPLY AND GROUND CIRCUIT
EC-573
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4. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body.
Refer to EC-578, "
Ground Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace ground connections.
5. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 1, 115, 116 and 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.
PBIB2021E
Continuity should exist.
Page 952 of 4179
![NISSAN X-TRAIL 2003 Service Repair Manual EC-574
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POWER SUPPLY AND GROUND CIRCUIT
6. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminals 1 and 6 and
ground with CONS NISSAN X-TRAIL 2003 Service Repair Manual EC-574
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POWER SUPPLY AND GROUND CIRCUIT
6. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminals 1 and 6 and
ground with CONS](/manual-img/5/57404/w960_57404-951.png)
EC-574
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POWER SUPPLY AND GROUND CIRCUIT
6. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminals 1 and 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 E61, F38
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.
8. CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 111 and ECM relay terminal 2.
Refer to Wiring Diagram.
2. 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 F41, M61
Harness for open or short between ECM relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB1973E
Voltage: Battery voltage
SEF420X
Continuity should exist.