2001 NISSAN X-TRAIL check engine

LAN-14
[CAN]
CAN SYSTEM (FOR M/T MODELS)
Work Flow
EKS002FN
1. Print all the data of “SELF-DIAG RESULTS” and “DATA MONITOR” for “ENGINE”, “ALL MODE 4WD”,
and “ABS” displayed on CONSULT-II. Refer to the following:
●EC-854, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITH EURO-OBD) for “ENGINE”
●EC-1199, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITHOUT EURO-OBD) for “ENGINE”
●EC-1448, "DTC U1000 CAN COMMUNICATION LINE" (YD) for “ENGINE”
●TF-53, "CAN COMMUNICATION SYSTEM" for “ALL MODE 4WD”
●BRC-110, "Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steering Wheel
Angle Sensor" for “ABS”
2. Attach the printed sheet of “SELF-DIAG RESULTS” and “DATA MONITOR” onto the check sheet. Refer to
LAN-15, "
CHECK SHEET" .
3. Based on the data monitor results, put “v” marks onto the items with “UNKWN” or “NG” in the check sheet
table. Refer to LAN-15, "
CHECK SHEET" .
NOTE:
If “NG” is displayed on “CAN COMM” for the diagnosed control unit, replace the control unit.
4. According to the check sheet results (example), start inspection. Refer to LAN-16, "
CHECK SHEET
RESULTS (EXAMPLE)" .

LAN-18
[CAN]
CAN SYSTEM (FOR M/T MODELS)
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect steering wheel angle sensor connector and harness connector M75.
2. Check continuity between steering wheel angle sensor harness
connector M81 terminals 4 (W), 5 (R) and harness connector
M75 terminals 8 (W), 19 (R).
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect 4WD control unit connector.
2. Check continuity between harness connector E116 terminals 8
(W), 19 (R) and 4WD control unit harness connector E122 termi-
nals 48 (W), 39 (R).
OK or NG
OK >> Reconnect all connectors to perform “SELF-DIAG
RESULTS” and “DATA MONITOR” for “ENGINE”, “ALL
MODE 4WD” and “ABS” displayed on CONSULT-II.
Refer to the following:
●EC-854, "DTC U1000 CAN COMMUNICATION LINE"
(QR20 WITH EURO-OBD) for “ENGINE”
●EC-1199, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITHOUT EURO-OBD) for
“ENGINE”
●EC-1448, "DTC U1000 CAN COMMUNICATION LINE" (YD) for “ENGINE”
●TF-53, "CAN COMMUNICATION SYSTEM" for “ALL MODE 4WD”
●BRC-110, "Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steer-
ing Wheel Angle Sensor" for “ABS”
NG >> Repair harness.
ECM Circuit CheckEKS002FQ
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Check following terminals and connector for damage, bend and loose connection (control module-side
and harness-side).
●ECM.
●Harness connector F41 (QR20DE engine models).
●Harness connector M61 (QR20DE engine models).
●Harness connector F29 (YD22DDTi engine models).
●Harness connector M64 (YD22DDTi engine models).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.4 (W) – 8 (W) : Continuity should exist.
5 (R) – 19 (R) : Continuity should exist.
SKIA0928E
8 (W) – 48 (W) : Continuity should exist.
19 (R) – 39 (R) : Continuity should exist.
SKIA0929E

CAN SYSTEM (FOR M/T MODELS)
LAN-19
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2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect ECM connector.
2. Check the following.
●QR20DE engine models:
Resistance between ECM harness connector F43 terminals 33
(W) and 34 (R).
●YD22DDTi engine models:
Resistance between ECM harness connector F35 terminals E11
(W) and E10 (R).
OK or NG
OK >> Replace ECM.
NG >> Repair harness between harness connector M75 and
ECM.
4WD Control Unit Circuit CheckEKS002FR
1.CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Check the terminals and connector of 4WD control unit for damage, bend and loose connection (control
unit-side and harness-side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect 4WD control unit connector.
2. Check resistance between 4WD control unit harness connector
E122 terminals 48 (W) and 39 (R).
OK or NG
OK >> Replace 4WD control unit.
NG >> Repair harness between harness connector E119 and
4WD control unit. 33 (W) – 34 (R)
(QR20DE engine models) : Approx. 108 – 132Ω
SKIA0888E
E11 (W) – E10 (R)
(YD22DDTi engine models) : Approx. 108 – 132Ω
SKIA4465E
48 (W) – 39 (R) : Approx. 54 – 66Ω
SKIA0930E

LAN-22
[CAN]
CAN SYSTEM (FOR M/T MODELS)
4. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect 4WD control unit connector and harness connector E11 6 .
2. Check continuity between 4WD control unit harness connector
E122 terminals 48 (W) and 39 (R).
OK or NG
OK >> GO TO 5.
NG >>
●Repair harness between harness connector E116 and
harness connector E119.
●Repair harness between harness connector E116 and
4WD control unit.
5. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between 4WD control unit harness connector E122
terminals 48 (W), 39 (R) and ground.
OK or NG
OK >> GO TO 6.
NG >>
●Repair harness between harness connector E116 and
harness connector E119.
●Repair harness between harness connector E116 and
4WD control unit.
6. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect steering wheel angle sensor connector and harness connector M61 (QR20DE engine models)
or harness connector M64 (YD22DDTi engine models).
2. Check continuity between steering wheel angle sensor harness
connector M81 terminals 4 (W) and 5 (R).
OK or NG
OK >> GO TO 7.
NG >>
●Repair harness between harness connector M75 and
harness connector M61 (QR20DE engine models).
●Repair harness between harness connector M75 and
harness connector M64 (YD22DDTi engine models).
●Repair harness between steering wheel angle sensor
and harness connector M75. 48 (W) – 39 (R) : Continuity should not exist.
SKIA0930E
48 (W) – ground : Continuity should not exist.
39 (R) – ground : Continuity should not exist.
SKIA0931E
4 (W) – 5 (R) : Continuity should not exist.
PKIA0281E

CAN SYSTEM (FOR M/T MODELS)
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7.CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between steering wheel angle sensor harness con-
nector M81 terminals 4 (W), 5 (R) and ground.
OK or NG
OK >> GO TO 8.
NG >>
●Repair harness between harness connector M75 and
harness connector M61 (QR20DE engine models).
●Repair harness between harness connector M75 and
harness connector M64 (YD22DDTi engine models).
●Repair harness between steering wheel angle sensor and harness connector M75.
8.CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect ECM connector.
2. Check the following.
●QR20DE engine models:
Continuity between ECM harness connector F43 terminals 33
(W) and 34 (R).
●YD22DDTi engine models:
Continuity between ECM harness connector F35 terminals E11
(W) and E10 (R).
OK or NG
OK >> GO TO 9.
NG >>
●Repair harness between ECM and harness connector
F41 (QR20DE engine models).
●Repair harness between ECM and harness connector
F29 (YD22DDTi engine models). 4 (W) – ground : Continuity should not exist.
5 (R) – ground : Continuity should not exist.
SKIA0932E
33 (W) – 34 (R)
(QR20DE engine models): Continuity should not
exist.
SKIA0888E
E11 (W) – E10 (R)
(YD22DDTi engine models) : Continuity should not
exist.
SKIA4465E

LAN-24
[CAN]
CAN SYSTEM (FOR M/T MODELS)
9. CHECK HARNESS FOR SHORT CIRCUIT
1. Check the following.
●QR20DE engine models:
Continuity between ECM harness connector F43 terminals 33
(W), 34 (R) and ground.
●YD22DDTi engine models:
Continuity between ECM harness connector F35 terminals E11
(W), E10 (R) and ground.
OK or NG
OK >> GO TO 10.
NG >>
●Repair harness between ECM and harness connector
F41 (QR20DE engine models).
●Repair harness between ECM and harness connector F29 (YD22DDTi engine models).
10. ECM / ESP/TCS/ABS CONTROL UNIT INTERNAL CIRCUIT INSPECTION
Check components inspection. Refer to LAN-25, "
ECM / ESP/TCS/ABS CONTROL UNIT INTERNAL CIR-
CUIT INSPECTION"
OK or NG
OK >> Reconnect all connectors to perform “SELF-DIAG RESULTS” and “DATA MONITOR” for
“ENGINE”, “ALL MODE 4WD” and “ABS” displayed on CONSULT-II. Refer to the following:
●EC-854, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITH EURO-OBD) for “ENGINE”
●EC-1199, "DTC U1000 CAN COMMUNICATION LINE" (QR20 WITHOUT EURO-OBD) for
“ENGINE”
●EC-1448, "DTC U1000 CAN COMMUNICATION LINE" (YD) for “ENGINE”
●TF-53, "CAN COMMUNICATION SYSTEM" for “ALL MODE 4WD”
●BRC-110, "Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steer-
ing Wheel Angle Sensor" for “ABS”
NG >> Replace ECM and/or ESP/TCS/ABS control unit.33 (W) – ground
(QR20DE engine models): Continuity should not
exist.
34 (R) – ground
(QR20DE engine models): Continuity should not
exist.
SKIA0889E
E11 (W) – ground
(YD22DDTi engine models): Continuity should not
exist.
E10 (R) – ground
(YD22DDTi engine models): Continuity should not
exist.
SKIA4466E

CAN SYSTEM (FOR M/T MODELS)
LAN-25
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Component InspectionEKS002FW
ECM / ESP/TCS/ABS CONTROL UNIT INTERNAL CIRCUIT INSPECTION
●Remove ECM and ESP/TCS/ABS control unit from vehicle.
●Check resistance between ECM terminals 33 and 34 (QR20DE
engine models).
●Check resistance between ECM terminals E11 and E10
(YD22DDTi engine models).
●Check resistance between ESP/TCS/ABS control unit terminals
61 and 63.
Unit Terminal Resistance value (Ω)
ECM
(QR20DE engine models)33 – 34
Approx. 108 - 132 ECM
(YD22DDTi engine models)E11 – E10
ESP/TCS/ABS control unit 61 – 63
SKIA0933E

AV-12
AUDIO
Trouble Diagnoses
EKS002F5
AUDIO UNIT
Symptom Possible causes Repair order
Audio unit inoperative (no digital display
and no sound from speakers).1. 10A fuse
2. Poor audio unit case ground
3. Audio unit1. Check 10A fuse [No. 4, located
in fuse block (J/B)]. Turn ignition
switch ON and verify that battery
positive voltage is present at ter-
minal 6 of audio unit.
2. Check audio unit case ground.
3. Remove audio unit for repair.
Audio unit presets are lost when ignition
switch is turned OFF.1. 15A fuse
2. Audio unit1. Check 15A fuse (No. 32, located
in fuse and fusible link box) and
verify that battery positive volt-
age is present at terminal 3 of
audio unit.
2. Remove audio unit for repair.
Individual rear speaker is noisy or inopera-
tive.1. Each speaker
2. Output circuit to each speaker1. Check speaker.
2. Check the output circuits to each
speaker between audio unit and
each speaker.
AM/FM stations are weak or noisy. 1. Roof antenna
2. Audio unit ground
3. Audio unit1. Check roof antenna.
2. Check audio unit ground condi-
tion.
3. Remove audio unit for repair.
Audio unit generates noise in AM and FM
modes with engine running.1. Poor audio unit ground
2. Loose or missing ground bonding straps
3. Ignition condenser or rear window defogger
noise suppressor condenser
4. Ignition coil or secondary wiring
5. Audio unit1. Check audio unit ground.
2. Check ground bonding straps.
3. Replace ignition condenser or
rear window defogger noise sup-
pressor condenser.
4. Check ignition coil and second-
ary wiring.
5. Remove audio unit for repair.
Audio unit generates noise in AM and FM
modes with accessories on (switch pops
and motor noise).1. Poor audio unit ground
2. Antenna
3. Accessory ground
4. Malfunctioning accessory1. Check audio unit ground.
2. Check antenna.
3. Check accessory ground.
4. Replace accessory.