NISSAN LATIO 2009 Service Repair Manual

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Refer to
EC-120, " Diagnosis Procedure " .
Is the inspection result normal? YES >> Replace IPDM E/R. Refer to
PG-27, " Removal and Installation of IPDM E/R " .
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
Ground Inspection INFOID:0000000004784172
Ground connections are very important to the proper oper ation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted re sistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
• Remove the ground bolt or screw.
• Inspect all mating surfaces for tarnish, dirt, rust, etc.
• Clean as required to assure good contact.
• Reinstall bolt or screw securely.
• Inspect for “add-on” accessories which may be interfering with the ground circuit.
• If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one eye-
let make sure no ground wires have excess wire insulation.
For detailed ground distribution information, refer to PG-29, " Ground Distribution " .

YES >>
EC-127, " Diagnosis Procedure " .
NO >> INSPECTION END DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U0101 Lost communication with
TCM When ECM is not transmitting or receiving CAN
communication signal of OBD (emission-related
diagnosis) with TCM for 2 seconds or more. • CAN communication line between
TCM and ECM
(CAN communication line is open or
shorted)

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Wiring Diagram
INFOID:0000000004780557
Diagnosis Procedure INFOID:0000000004780048
Go to LAN-17, " Trouble Diagnosis Flow Chart " .

YES >>
EC-129, " Diagnosis Procedure " .
NO >> INSPECTION END DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U0140 Lost communication with
BCM When ECM is not transmitting or receiving CAN
communication signal of OBD (emission related
diagnosis) with BCM for 2 seconds or more. • CAN communication line between
BCM and ECM
(CAN communication line is open or
shorted)

U0140 CAN COMM CIRCUIT
EC-129
< COMPONENT DIAGNOSIS >
[HR16DE] C
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Wiring Diagram
INFOID:0000000004780678
Diagnosis Procedure INFOID:0000000004780051
Go to LAN-17, " Trouble Diagnosis Flow Chart " . BBWA2626E

YES >>
EC-131, " Diagnosis Procedure " .
NO >> INSPECTION END DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U1001 CAN communication line When ECM is not transmitting or receiving CAN
communication signal other than OBD (emission
related diagnosis) for 2 seconds or more. • Harness or connectors
(CAN communication line is open or
shorted)

U1001 CAN COMM CIRCUIT
EC-131
< COMPONENT DIAGNOSIS >
[HR16DE] C
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Wiring Diagram
INFOID:0000000004780679
Diagnosis Procedure INFOID:0000000004780054
Go to LAN-17, " Trouble Diagnosis Flow Chart " . BBWA2626E

DTC Logic " .
DTC CONFIRMATION PROCEDURE YES >> Go to
EC-133, " Diagnosis Procedure "
NO >> GO TO 3.ENG SPEED 500 - 2,000 rpm
COOLAN TEMP/S More than 60 °C (140 °F)
B/FUEL SCHDL More than 4.2 msec
Selector lever P or N position (A/T)
Neutral position (M/T) ENG SPEED 1,500 - 3,175 rpm (A cons
tant rotation is maintained.)
COOLAN TEMP/S More than 70 °C (221 °F)

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CAUTION:
Always drive at a safe speed.
2. Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected? YES >> Go to
EC-133, " Diagnosis Procedure "
NO >> INSPECTION END
Diagnosis Procedure INFOID:0000000004780056YES >> Go to
LU-7, " Inspection " .
NO >> GO TO 2. Component Inspection " .
Is the inspection result normal? YES >> GO TO 3.
NO >> Replace intake valve timing control solenoid valve. Component Inspection " .
Is the inspection result normal? YES >> GO TO 4.
NO >> Replace crankshaft position sensor (POS). Component Inspection " .
Is the inspection result normal? YES >> GO TO 5.
NO >> Replace camshaft position sensor (PHASE).

YES >> GO TO 6.
NO >> Remove debris and clean the signal plate of camshaft rear end or replace camshaft. YES >> Check timing chain installation. Refer to
EM-49, " Removal and Installation " .
NO >> GO TO 7. Inspection " , “INSPECTION AFTER INSTALATION”.
Is the inspection result normal? YES >> GO TO 8.
NO >> Clean lubrication line. Diagnosis Procedure " .
>> INSPECTION END
Component Inspection INFOID:0000000004780057YES >> GO TO 2.
NO >> Replace intake valve timing control solenoid valve.