2009 NISSAN LATIO service

EC-620< SERVICE INFOMATION >
[MR TYPE 1]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DETAILED PROCEDURE 1.
CHECK “A/F ALPHA-B1”
1. Start engine.
2. Confirm that the testing conditions are met. Refer to EC-618, " Testing Condition " .
3. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITO R” mode, and make sure that the indication is within
the SP value.
NOTE: PBIB3213E

OK >>
INSPECTION END
NG >> GO TO 9. OK >> GO TO 12.
NG >> GO TO 10. .)
- Fuel injector and its circuit (Refer to EC-986 .)
- Intake air leakage
- Low compression pressure (Refer to EM-185, " On-Vehicle Service " .)
2. If NG, repair or replace the malfunctioning part.
If OK, replace fuel injector. (It may be caus ed by leakage from fuel injector or clogging.)
>> GO TO 11. OK >>
INSPECTION END
NG >> GO TO 12. DTC Confirmation Procedure " .
• For DTC P0131, refer to EC-698, " DTC Confirmation Procedure " .
• For DTC P0132, refer to EC-704, " DTC Confirmation Procedure " .
• For DTC P0133, refer to EC-710, " DTC Confirmation Procedure " .
• For DTC P2A00, refer to EC-966, " DTC Confirmation Procedure " .
OK or NG OK >> GO TO 15.
NG >> GO TO 13.

POWER SUPPLY AND GROUND CIRCUIT
EC-627
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
POWER SUPPLY AND GROUND CIRCUIT
Wiring Diagram INFOID:0000000004537069
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals wh en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground. BBWA2625E

EC-628< SERVICE INFOMATION >
[MR TYPE 1]
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure INFOID:00000000045370701.
INSPECTION START
Start engine.
Is engine running?
Yes or No Yes >> GO TO 8.
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 93 and ground with CON- SULT-III or tester.
OK or NG OK >> GO TO 4.
NG >> GO TO 3. 3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• 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 GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-632, " Ground Inspection " .
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
10 11 B
B ECM ground
[Engine is running]
• Idle speed Body ground
32 P ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition switch OFF 0 - 1.0V
[Ignition switch: OFF]
• More than a few seconds after turning ignition
switch OFF BATTERY VOLTAGE
(11 - 14V)
93 O Ignition switch [Ignition switch: OFF]
0V
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
105 G Power supply for
ECM [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
108 B ECM ground [Engine is running]
• Idle speed Body groundVoltage: Battery voltage
PBIA9561J

POWER SUPPLY AND GROUND CIRCUIT
EC-631
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O 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. 14.
CHECK GROUND CONNECTIONS
1. Loosen and retighten ground screw on the body. Refer to EC-632, " 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-626 .
OK or NG OK >> Replace IPDM E/R. Refer to
PG-26, " 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.

EC-632< SERVICE INFOMATION >
[MR TYPE 1]
POWER SUPPLY AND GROUND CIRCUIT
Ground Inspection INFOID:0000000004537071
Ground connections are very important to the proper oper ation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and ot her corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance 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 termi nal, 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 " .
PBIB1870E

EC-634< SERVICE INFOMATION >
[MR TYPE 1]
DTC U1000, U1001 CAN COMMUNICATION LINE
Wiring Diagram INFOID:0000000004537075
Diagnosis Procedure INFOID:0000000004537076
Go to LAN-17, " Trouble Diagnosis Flow Chart " . BBWA2626E

EC-638< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0011 IVT CONTROL
If 1st trip DTC is detected, go to EC-638, " Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III” above.
Diagnosis Procedure INFOID:00000000045370851.
CHECK OIL PRESSURE WARNING LAMP
1. Start engine.
2. Check oil pressure warning lamp and confirm it is not illumi-
nated.
OK or NG OK >> GO TO 2.
NG >> Go to LU-16, " Inspection " .
2.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EC-639, " Component Inspection " .
OK or NG OK >> GO TO 3.
NG >> Replace intake valve timing control solenoid valve. 3.
CHECK CRANKSHAFT POSI TION SENSOR (POS)
Refer to EC-780, " Component Inspection " .
OK or NG OK >> GO TO 4.
NG >> Replace crankshaft position sensor (POS). 4.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to EC-785, " Component Inspection " .
OK or NG OK >> GO TO 5.
NG >> Replace camshaft position sensor (PHASE). 5.
CHECK CAMSHAFT (INTAKE)
Check the following.
• Accumulation of debris to the si gnal plate of camshaft (1) rear end
• Chipping signal plate of camshaft rear end
OK or NG OK >> GO TO 6.
NG >> Remove debris and clean the signal plate of camshaft rear end or replace camshaft. 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?
Yes or No Yes >> Check timing chain installation. Refer to
EM-160 .
No >> GO TO 7. PBIA8559J
PBIA9557J