Basic Inspection

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
     Fig 1: Inspect Connectors & Vacuum Hoses

     Courtesy of NISSAN MOTOR CO., U.S.A.
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.

   Fig 2: Engine Coolant Temperature Indicator Pointing To Middle Of Gauge

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Run engine at about 2, 000 rpm for about 2 minutes under no load.
   Fig 3: Run engine at about 2, 000 rpm

   Courtesy of NISSAN MOTOR CO., U.S.A.
6. Make sure that no DTC is displayed with CONSULT-II or GST.

OK or NG 

1. OK: GO TO  3.
2. NG: GO TO 2.

Repair or replace components as necessary according to corresponding Diagnostic Procedure.

1. : GO TO 3.

With CONSULT-II 

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.
   Fig 4: Rev Engine (2, 000 to 3, 000 rpm)

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Read idle speed in "DATA MONITOR" mode with CONSULT-II.

   A/T: 650+/- 50 rpm (in P or N position) 

   M/T: 650+/- 50 rpm (in N position) 

   Fig 5: Displaying "DATA MONITOR" Mode With CONSULT-II

   Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II 

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.

   A/T: 650+/- 50 rpm (in P or N position) 

   M/T: 650+/- 50 rpm (in N position) 

OK or NG 

1. OK: GO TO  10.
2. NG: GO TO  7.

1. Stop engine.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
   1. : GO TO 5.

Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".

1. : GO TO 6.

Refer to "IDLE AIR VOLUME LEARNING ".

Is Idle Air Volume Learning carried out successfully? 

YES or NO 

1. YES: GO TO 7.
2. NO:
   1. Follow the instruction of Idle Air Volume Learning.
   2. GO TO  7.

With CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in "DATA MONITOR" mode with CONSULT-II.

   A/T: 650+/- 50 rpm (in P or N position) 

   M/T: 650+/- 50 rpm (in N position) 

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

   A/T: 650+/- 50 rpm (in P or N position) 

   M/T: 650+/- 50 rpm (in N position) 

OK or NG 

1. OK: GO TO  10.
2. NG: GO TO 8.

Check the following.

• Check camshaft position sensor (PHASE) and circuit. Refer to DTC P0340, P0345 CMP SENSOR (PHASE) .
• Check crankshaft position sensor (POS) and circuit. Refer to DTC P0335 CKP SENSOR (POS) .

OK or NG 

1. OK: GO TO 9.
2. NG:
   1. Repair or replace.
   2. GO TO  7.

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a incident, but this is the rarely the case.)
2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to "IVIS (Infiniti Vehicle Immobilizer System - NATS) ".

1. : GO TO  7.

1. Run engine at idle.
2. Check ignition timing with a timing light.

   A/T: 15 +/- 5° BTDC (in P or N position) 

   M/T: 15 +/- 5° BTDC (in N position) 

OK or NG 

1. OK:INSPECTION END 
2. NG: GO TO 11. 
   Fig 6: Checking Ignition Timing With Timing Light

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. Stop engine.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING "
   1. : GO TO 12.

Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".

1. : GO TO 13.

Refer to "IDLE AIR VOLUME LEARNING ".

Is Idle Air Volume Learning carried out successfully? 

YES or NO 

1. YES: GO TO 14.
2. NO:
   1. Follow the instruction of Idle Air Volume Learning
   2. GO TO  7.

With CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in "DATA MONITOR" mode with CONSULT-II.

   A/T: 650+/- 50 rpm (in P or N position) 

   M/T: 650+/- 50 rpm (in N position) 

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

   A/T: 650+/- 50 rpm (in P or N position) 

   M/T: 650+/- 50 rpm (in N position) 

OK or NG 

1. OK: GO TO 15.
2. NG: GO TO  17.

1. Run engine at idle.
2. Check ignition timing with a timing light.

   A/T: 15 +/- 5° BTDC (in P or N position) 

   M/T: 15 +/- 5° BTDC (in N position) 

OK or NG 

1. OK:INSPECTION END 
2. NG: GO TO 11. 
   Fig 7: Checking Ignition Timing Again

   Courtesy of NISSAN MOTOR CO., U.S.A.

Check timing chain installation. Refer to TIMING CHAIN in ENGINE MECHANICAL - G35 COUPE article.

OK or NG 

1. OK: GO TO 17.
2. NG:
   1. Repair the timing chain installation.
   2. GO TO  7.

Check the following.

• Check camshaft position sensor (PHASE) and circuit. Refer to DTC P0340, P0345 CMP SENSOR (PHASE) .
• Check crankshaft position sensor (POS) and circuit. Refer to DTC P0335 CKP SENSOR (POS) .

OK or NG 

1. OK: GO TO 18.
2. NG:
   1. Repair or replace.
   2. GO TO  7.

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a incident, but this is the rarely the case.
2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to "IVIS (Infiniti Vehicle Immobilizer System - NATS) ".
   1. : GO TO  7.