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![INFINITI M35 2007 Factory Service Manual EC-88
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BASIC SERVICE PROCEDURE
Revision: 2007 April2007 M35/M45
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
s INFINITI M35 2007 Factory Service Manual EC-88
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BASIC SERVICE PROCEDURE
Revision: 2007 April2007 M35/M45
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
s](/manual-img/42/57024/w960_57024-1616.png)
EC-88
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BASIC SERVICE PROCEDURE
Revision: 2007 April2007 M35/M45
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.
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 throttle 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 eliminate the cause of the incident.
It is useful to perform EC-143, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
5.If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle Air Volume Learning all over again:
–Engine stalls.
–Erroneous idle.
Fuel Pressure CheckNBS004SX
FUEL PRESSURE RELEASE
With CONSULT-II
1. Turn ignition switch ON.
2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel
pressure.
5. Turn ignition switch OFF.
ITEM SPECIFICATION
Idle speed 650 ± 50 rpm (in P or N position)
Ignition timing 15 ± 5° BTDC (in P or N position)
SEC897C
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Without CONSULT-II
1. Remove fuel pump fuse (1) located in IPDM E/R (2).
2. Start engine.
3. After en INFINITI M35 2007 Factory Service Manual BASIC SERVICE PROCEDURE
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1. Remove fuel pump fuse (1) located in IPDM E/R (2).
2. Start engine.
3. After en](/manual-img/42/57024/w960_57024-1617.png)
BASIC SERVICE PROCEDURE
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Without CONSULT-II
1. Remove fuel pump fuse (1) located in IPDM E/R (2).
2. Start engine.
3. After engine stalls, crank it two or three times to release all fuel
pressure.
4. Turn ignition switch OFF.
5. Reinstall fuel pump fuse after servicing fuel system.
FUEL PRESSURE CHECK
CAUTION:
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:
Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be completely released because Y50 models do not have fuel return system.
Use Fuel Pressure Gauge Kit (J-44321) to check fuel pressure.
1. Release fuel pressure to zero. Refer to EC-88, "
FUEL PRESSURE RELEASE" .
2. Install the inline fuel quick disconnected fitting between fuel
damper and fuel injector tube.
3. Connect the fuel pressure test gauge (quick connector adapter
hose) to the inline fuel quick disconnected fitting.
4. Turn ignition switch ON and check for fuel leakage.
5. Start engine and check for fuel leakage.
6. Read the indication of fuel pressure gauge.
7. If result is unsatisfactory, go to next step.
8. Check the following.
Fuel hoses and fuel tubes for clogging
Fuel filter for clogging
Fuel pump
Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace.
PBIB2697E
At idling:
Approximately 350 kPa (3.57 kg/cm2 , 51 psi)
PBIB1571E
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![INFINITI M35 2007 Factory Service Manual EC-90
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TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionNBS004SY
INTRODUCTION
The engine has an ECM to control major systems such as INFINITI M35 2007 Factory Service Manual EC-90
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TROUBLE DIAGNOSIS
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TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionNBS004SY
INTRODUCTION
The engine has an ECM to control major systems such as](/manual-img/42/57024/w960_57024-1618.png)
EC-90
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TROUBLE DIAGNOSIS
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TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionNBS004SY
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 the cause of the incidents. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on EC-91
.
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 EC-95
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.
MEF036D
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TROUBLE DIAGNOSIS
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WORK FLOW
Overall Sequence
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![INFINITI M35 2007 Factory Service Manual EC-92
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TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Detailed Flow
1. GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the e INFINITI M35 2007 Factory Service Manual EC-92
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TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Detailed Flow
1. GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the e](/manual-img/42/57024/w960_57024-1620.png)
EC-92
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TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Detailed Flow
1. GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using the EC-94, "
DIAGNOSTIC WORKSHEET" .
>> GO TO 2.
2. CHECK DTC*1
1. Check DTC*1 .
2. Perform the following procedure if DTC*
1 is displayed.
–Record DTC*1 and freeze frame data*2 . (Print them out with CONSULT-II or GST.)
–Erase DTC*1 . (Refer to EC-68, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"
.)
–Study the relationship between the cause detected by DTC*1 and the symptom described by the cus-
tomer. (Symptom Matrix Chart is useful. Refer to EC-99, "
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.
3. CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer (except MIL ON).
DIAGNOSIS WORK SHEET is useful to verify the incident.
Connect CONSULT-II to the vehicle in “DATA MONITOR (AUTO TRIG)” mode and check real time diagnosis
results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 5.
4. CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer.
DIAGNOSIS WORK SHEET is useful to verify the incident.
Connect CONSULT-II to the vehicle in “DATA MONITOR (AUTO TRIG)” mode and check real time diagnosis
results.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 6.
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5. PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC*
1 , and then INFINITI M35 2007 Factory Service Manual TROUBLE DIAGNOSIS
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5. PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC*
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TROUBLE DIAGNOSIS
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5. PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC*
1 , and then make sure that DTC*1 is detected
again.
At this time, always connect CONSULT-II to the vehicle, and check diagnostic results in real time on “DATA
MONITOR (AUTO TRIG)”.
If two or more DTCs*
1 are detected, refer to EC-96, "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 Confirma-
tion Procedure.
Is DTC*
1 detected?
Ye s > > G O T O 1 0 .
No >> Check according to EC-153, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
6. PERFORM BASIC INSPECTION
Perform EC-78, "
Basic Inspection" .
With CONSULT-II>>GO TO 7.
Without CONSULT-II>>GO TO 9.
7. PERFORM DATA MONITOR (SPEC) MODE
With CONSULT-II
Make sure that “MAS A/F SE-B1”, “B/FUEL SCHDL”, and “A/F
ALPHA-B1”, “A/F ALPHA-B2” are within the SP value using CON-
SULT-II “DATA MONITOR (SPEC)” mode. Refer to EC-144, "
Diag-
nostic Procedure" .
Are they within the SP value?
Ye s > > G O T O 9 .
No >> GO TO 8.
8. DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Detect malfunctioning part according to EC-143, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
Is malfunctioning part detected?
Ye s > > G O T O 11 .
No >> GO TO 9.
9. DETECT MALFUNCTIONING SYSTEM BY SYMPTOM MATRIX CHART
Detect malfunctioning system according to EC-99, "
Symptom Matrix Chart" based on the confirmed symptom
in step 4, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 10.
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![INFINITI M35 2007 Factory Service Manual EC-94
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TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
10. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic P INFINITI M35 2007 Factory Service Manual EC-94
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TROUBLE DIAGNOSIS
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10. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic P](/manual-img/42/57024/w960_57024-1622.png)
EC-94
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TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
10. DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in GI-
28, "How to Perform Efficient Diagnosis for an Electrical Incident" .
Is malfunctioning part detected?
Yes >> GO TO 11.
No >> Monitor input data from related sensors or check voltage of related ECM terminals using CON-
SULT-II. Refer to EC-138, "
CONSULT-II Reference Value in Data Monitor" , EC-114, "ECM Termi-
nals and Reference Value" .
11 . REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it, refer to EC-68, "
HOW TO ERASE EMISSION-RELATED DIAG-
NOSTIC INFORMATION" .
>> GO TO 12.
12. FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,
and then make sure that the malfunction have been repaired securely.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure
that the symptom is not detected.
OK or NG
NG (DTC*1 is detected)>>GO TO 10.
NG (Symptom remains)>>GO TO 6.
OK >> 1. Before returning the vehicle to the customer, make sure to erase unnecessary DTC*
1 in ECM
and TCM (Transmission Control Module). (Refer to EC-68, "
HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION" and AT- 4 1 , "HOW TO ERASE DTC" .)
2. If the completion of SRT is needed, drive vehicle under the specific driving pattern. Refer to EC-
65, "Driving Pattern" .
3.INSPECTION END
*1: Include 1st trip DTC.
*2: Include 1st trip freeze frame data.
DIAGNOSTIC WORKSHEET
Description
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 MIL 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.
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Worksheet Sample
MTBL0017