Page 1272 of 2896
TROUBLE DIAGNOSIS
EC-103
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Circuit DiagramUBS00PKK
BBWA2623E
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EC-144Revision: June 2006
POWER SUPPLY AND GROUND CIRCUIT
2007 Versa
POWER SUPPLY AND GROUND CIRCUITPFP:24110
Wiring DiagramUBS00PKX
BBWA2625E
Page 1315 of 2896
EC-146Revision: June 2006
POWER SUPPLY AND GROUND CIRCUIT
2007 Versa
4. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body.
Refer to EC-150, "
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. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 10, 11, 108 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F8, E8
Harness for open or short between ECM and ground
>> Repair open circuit or short to power in harness or connectors.
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Continuity should exist.
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EC-148Revision: June 2006
POWER SUPPLY AND GROUND CIRCUIT
2007 Versa
10. CHECK ECM POWER SUPPLY CIRCUIT-V
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E43.
3. Check harness continuity between ECM terminal 105 and IPDM E/R terminal 4.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 17.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
11 . CHECK ECM POWER SUPPLY CIRCUIT-VI
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E43.
3. Check harness continuity between ECM terminal 32 and IPDM E/R terminal 7.
Refer to Wiring Diagram.
4. 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 E8, F8
Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
13. CHECK 20A FUSE
1. Disconnect 20A fuse from IPDM E/R.
2. Check 20A fuse.
OK or NG
OK >> GO TO 17.
NG >> Replace 20A fuse.Continuity should exist.
Continuity should exist.
Page 1318 of 2896

POWER SUPPLY AND GROUND CIRCUIT
EC-149
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14. CHECK GROUND CONNECTIONS
1. Loosen and retighten ground screw on the body.
Refer to EC-150, "
Ground Inspection" .
OK or NG
OK >> GO TO 15.
NG >> Repair or replace ground connections.
15. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 10, 11, 108 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 17.
NG >> GO TO 16.
16. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F8, E8
Harness for open or short between ECM and ground
>> Repair open circuit or short to power in harness or connectors.
17. CHECK INTERMITTENT INCIDENT
Refer to EC-143, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "IPDM E/R Power/Ground Circuit Inspection" .
NG >> Repair open circuit or short to power in harness or connectors.
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Continuity should exist.
Page 1321 of 2896
EC-152Revision: June 2006
DTC U1000, U1001 CAN COMMUNICATION LINE
2007 Versa
Wiring DiagramUBS00QC0
BBWA2626E
Page 1328 of 2896
DTC P0011 IVT CONTROL
EC-159
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6. CHECK TIMING CHAIN INSTALLATION
Check service records for any recent repairs that may cause timing chain misaligned.
Are there any service records that may cause timing chain misaligned?
Ye s o r N o
Yes >> Check timing chain installation. Refer to EM-37, "TIMING CHAIN" .
No >> GO TO 7.
7. CHECK LUBRICATION CIRCUIT
Refer to EM-49, "
INSPECTION AFTER REMOVAL" .
OK or NG
OK >> GO TO 8.
NG >> Clean lubrication line.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-143, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For Wiring Diagram, refer to EC-321, "
Wiring Diagram" for CKP sensor (POS) and EC-329, "Wiring Diagram"
for CMP sensor (PHASE).
>>INSPECTION END
Page 1331 of 2896
EC-162Revision: June 2006
DTC P0031, P0032 A/F SENSOR 1 HEATER
2007 Versa
Wiring DiagramUBS00QCH
BBWA2630E