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Home >> Infiniti >> 2011 >> G37 Convertible V6-3.7L (VQ37VHR) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Basic Inspection

Basic Inspection





INSPECTION AND ADJUSTMENT


BASIC INSPECTION : Special Repair Requirement

1.INSPECTION START
1. Check service records for any recent repairs that may 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.
Are any DTCs detected?
YES - GO TO 2.
NO - GO TO 3.
2.REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnosis Procedure.
- GO TO 3
3.CHECK IDLE SPEED
1. Run engine at about 2,000 rpm for about 2 minutes under no load.





2. Rev engine (2,000 to 3,000 rpm) two or three times under no load, then run engine at idle speed for about 1 minute.
3. Check idle speed.
For procedure, Special Repair Requirement.
For specification, [1][2]Idle Speed.
Is the inspection result normal?
YES - GO TO 10.
NO - GO TO 4.
4.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform Special Repair Requirement.
- GO TO 5.
5.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform Special Repair Requirement.
- GO TO 6.
6.PERFORM IDLE AIR VOLUME LEARNING
Perform Special Repair Requirement.
Is Idle Air Volume Learning carried out successfully?
YES - GO TO 7.
NO - Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
7.CHECK IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, Special Repair Requirement.
For specification, [1][2]Idle Speed.
Is the inspection result normal?
YES - GO TO 10.
NO - GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the Following.
- Check camshaft position sensor (PHASE) and circuit. P0340.
- Check crankshaft position sensor (POS) and circuit. P0335.
Is the inspection result normal?
YES - GO TO 9.
NO - Repair or replace. Then GO TO 4.
9.CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident, although this is rare.)
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. .
- GO TO 4.
10.CHECK IGNITION TIMING
1. Run engine at idle.





2. Check ignition timing with a timing light.

A :Timing indicator

For procedure, Special Repair Requirement.
For specification, [1][2]Ignition Timing.
Is the inspection result normal?
YES - GO TO 19.
NO - GO TO 11.
11.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform Special Repair Requirement.
- GO TO 12.
12.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform Special Repair Requirement.
- GO TO 13.
13.PERFORM IDLE AIR VOLUME LEARNING
Perform Special Repair Requirement.
Is Idle Air Volume Learning carried out successfully?
YES - GO TO 14.
NO - Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
14.CHECK IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, Special Repair Requirement.
For specification, [1][2]Idle Speed.
Is the inspection result normal?
YES - GO TO 15.
NO - GO TO 17.
15.CHECK IGNITION TIMING AGAIN
1. Run engine at idle.





2. Check ignition timing with a timing light.

A :Timing indicator

For procedure, Special Repair Requirement.
For specification, [1][2]Ignition Timing.
Is the inspection result normal?
YES - GO TO 19.
NO - GO TO 16.
16.CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Removal And Installation.
Is the inspection result normal?
YES - GO TO 17.
NO - Repair the timing chain installation. Exploded View. Then GO TO 4.
17.DETECT MALFUNCTIONING PART
Check the following.
- Check camshaft position sensor (PHASE) and circuit. P0340.
- Check crankshaft position sensor (POS) and circuit. P0335.
Is the inspection result normal?
YES - GO TO 18.
NO - Repair or replace. Then GO TO 4.
18.CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident, although this is rare.)
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Special Repair Requirement.
- GO TO 4.
19.INSPECTION END
If ECM is replaced during this BASIC INSPECTION procedure, go to Special Repair Requirement.
- INSPECTION END
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