2009 NISSAN LATIO service

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-565
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O

• The A counter will be cleared when the malfunc tion is detected regardless of (1) - (4).
• The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
• The DTC will not be displayed after the A counter reaches 40.
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
• The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
• The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
• The MIL will go off when the B counter reaches 3 (*2 in “OBD SYSTEM OPERATION CHART”). JMBIA1920GB

EC-566< SERVICE INFOMATION >
[MR TYPE 1]
BASIC SERVICE PROCEDURE
BASIC SERVICE PROCEDURE
Basic Inspection INFOID:00000000045370431.
INSPECTION START
1. Check service records for any recent repairs that ma y indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
- Harness connectors for improper connections
- Wiring harness for improper connections, pinches and cut
- Vacuum hoses for splits, kinks and improper connections
- Hoses and ducts for leaks
- Air cleaner clogging
- Gasket
3. Confirm that electrical or mechanical loads are not applied.
- Headlamp switch is OFF.
- Air conditioner switch is OFF.
- Rear window defogger switch is OFF.
- Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no load.
6. Make sure that no DTC is displayed with CONSULT-III or GST.
OK or NG OK >> GO TO 3.
NG >> GO TO 2. 2.
REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3. 3.
CHECK TARGET IDLE SPEED
With CONSULT-III
1. Run engine at about 2,000 rpm for about 2 minutes under no load. SEF983U
SEF976U
SEF977U

BASIC SERVICE PROCEDURE
EC-569
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
Yes >> GO TO 14.
No >> 1. Follow the instruction of Idle Air Volume Learning. 2. GO TO 4. 14.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-III. Refer to EC-570, " Idle Speed and Ignition
Timing Check " .
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. Refer to EC-570, " Idle Speed and Ignition Timing Check " .
OK or NG OK >> GO TO 15.
NG >> GO TO 17. 15.
CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light. Refer to EC-570, " Idle Speed and Ignition Timing Check " .
- Timing indicator (1)
OK or NG OK >> GO TO 19
NG >> GO TO 16. 16.
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-160 .
OK or NG OK >> GO TO 17.
NG >> 1. Repair the timing chain installation.
2. GO TO 4. 17.
DETECT MALFUNCTIONING PART
Check the following.
• Check crankshaft position sensor (POS) and circuit. Refer to EC-775 .
• Check camshaft position s ensor (PHASE) and circuit.
Refer to EC-781 .
OK or NG OK >> GO TO 18.
NG >> 1. Repair or replace. 2. GO TO 4. 18.
CHECK ECM FUNCTION M/T: 700
± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position)
M/T: 700 ± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position) M/T: 13
± 5 ° BTDC (in Neutral position)
A/T: 13 ± 5 ° BTDC (in P or N position)
CVT: 13 ± 5 ° BTDC (in P or N position) PBIB3263E

ECM Re-communicating Function " .
>> GO TO 4. Yes >> 1. Perform
EC-572, " VIN Registration " .
2. INSPECTION END
No >> INSPECTION END
Idle Speed and Ignition Timing Check INFOID:0000000004537044
IDLE SPEED With CONSULT-III
Check idle speed in “DATA MONITOR” mode with CONSULT-III.
With GST
Check idle speed in Service $01 with GST.
IGNITION TIMING
Any of following two methods may be used.
Method A
1. Attach timing light to loop wire (1) as shown. • : Vehicle front
2. Check ignition timing. • Timing indicator (1)
Method B
1. Remove No. 4 ignition coil (1). PBIB3263E

EC-574< SERVICE INFOMATION >
[MR TYPE 1]
BASIC SERVICE PROCEDURE
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications. Refer to EC-566, " Basic Inspection " .
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.
DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1. Check that throttle valve is fully closed.
2. Check PCV valve operation.
3. Check that downstream of throttl e valve is free from air leakage.
4. When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and elim inate the cause of the incident.
It is useful to perform EC-618 .
5. If any of the following conditio ns occur after the engine has st arted, eliminate the cause of the
incident and perform Idle Air Vo lume Learning all over again:
- Engine stalls.
- Erroneous idle.
Fuel Pressure Check INFOID:0000000004537050
FUEL PRESSURE RELEASE With CONSULT-III
1. Turn ignition switch ON.
2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode with CONSULT-III.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
Without CONSULT-III
ITEM SPECIFICATION
Idle speed M/T: 700 ± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position)
Ignition timing M/T: 13 ± 5 ° BTDC (in Neutral position)
A/T: 13 ± 5 ° BTDC (in P or N position)
CVT: 13 ± 5 ° BTDC (in P or N position) SEC897C

TROUBLE DIAGNOSIS
EC-577
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
TROUBLE DIAGNOSIS
Trouble Diagnosis Introduction INFOID:0000000004537051
INTRODUCTION The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or other malfunctions with the engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find t he cause of the incidents. A road
test with CONSULT-III (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on "WORK FLOW".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on "Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.
WORK FLOW MEF036D
SEF233G
SEF234G

EC
NP
O Emission-related Diagnostic Information " )
- Study the relationship betw een the cause detected by DTC* 1
and the symptom described by the cus-
tomer. (Symptom Matrix Chart is useful. Refer to EC-583, " Symptom Matrix Chart " .)
3. Check related service bulletins for information.
Is any symptom described and any DTC detected? Symptom is described, DTC*
1
is displayed>>GO TO 3.
Symptom is described, DTC* 1
is not displayed>>GO TO 4.
Symptom is not described, DTC* 1
is displayed>>GO TO 5. DTC Inspection Priority Chart " and determine trouble
diagnosis order.
NOTE:
• Freeze frame data* 2
is useful if the DTC* 1
is not detected.
• Perform Overall Function Check if DTC Confirmation Procedure is not included on Service Manual. This
simplified check procedure is an effective alternative though DTC* 1
cannot be detected during this check.
If the result of Overall Function Check is NG, it is the same as the detection of DTC* 1
by DTC Confirmation
Procedure.
Is DTC* Yes >> GO TO 10.
No >> Check according to EC-626 .
Basic Inspection " .
With CONSULT-III>>GO TO 7.
Without CONSULT-III>>GO TO 9. Inspection Procedure " .
Are they within the SP value? Yes >> GO TO 9.

TROUBLE DIAGNOSIS
EC-581
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
There are many operating conditions
that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about a incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the one on the next page in order
to organize all the information for troubleshooting.
Some conditions may cause the MI L to come on steady or blink and
DTC to be detected. Examples:
• Vehicle ran out of fuel, which caused the engine to misfire.
• Fuel filler cap was left off or incorrectly screwed on, allowing fuel to evaporate into the atmosphere.
Worksheet Sample
DTC Inspection Priority Chart INFOID:0000000004537052
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart. SEF907L
MTBL0017