Inspection Procedure

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: Checking Harness Connectors For Improper Connections

     Courtesy of NISSAN MOTOR CO., U.S.A.
3. Confirm that electrical or mechanical loads are not applied.
   • Head lamp 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: Identifying Engine Temperature

   Courtesy of NISSAN MOTOR CO., U.S.A.
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-II or GST.

OK or NG 

1. OK: GO TO  3 .
2. NG: GO TO 2.

Fig 3: Identifying Engine RPM

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

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: Identifying Engine RPM Meter

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Read idle speed in "DATA MONITOR" mode with CONSULT-II.
   1. 4-speed A/T: 700 +/- 50 RPM (in P or N position) 
   2. 5-speed A/T: 675 +/- 50 RPM (in P or N position) 
   Fig 5: Displaying Data Monitor

   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.
   1. 4-speed A/T: 700 +/- 50 RPM (in P or N position) 
   2. 5-speed A/T: 675 +/- 50 RPM (in P or N position) 

OK or NG 

1. OK: GO TO  10 .
2. NG: GO TO 4.

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

Perform THROTTLE VALVE CLOSED POSITION LEARNING  .

1. GO TO 6.

Perform 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  4 .

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.
   1. 4-speed A/T: 700 +/- 50 RPM (in P or N position) 
   2. 5-speed A/T: 675 +/- 50 RPM (in P or N position) 

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
   1. 4-speed A/T: 700 +/- 50 RPM (in P or N position) 
   2. 5-speed A/T: 675 +/- 50 RPM (in P or 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  4 .

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is rarely the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to ECM RE-COMMUNICATING FUNCTION .
   1. GO TO  4 .

1. Run engine at idle.
2. Check ignition timing with a timing light.
   1. 15 +/- 5° BTDC (in P or N position) 

OK or NG 

1. OK (With CONSULT-II): GO TO  19 .
2. OK (Without CONSULT-II): GO TO  20 .
3. NG: GO TO 11.

Fig 6: Checking Ignition Timing

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.

Perform 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  4 .

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.
   1. 4-speed A/T: 700 +/- 50 RPM (in P or N position) 
   2. 5-speed A/T: 675 +/- 50 RPM (in P or N position) 

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
   1. 4-speed A/T: 700 +/- 50 RPM (in P or N position) 
   2. 5-speed A/T: 675 +/- 50 RPM (in P or 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.
   1. 15 +/- 5° BTDC (in P or N position) 

OK or NG 

1. OK (With CONSULT-II): GO TO  19 .
2. OK (Without CONSULT-II): GO TO  20 .
3. NG: GO TO 16.

Fig 7: Checking Ignition Timing

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

Check timing chain installation. Refer to TIMING CHAIN .

OK or NG 

1. OK: GO TO 17.
2. NG:
   1. Repair the timing chain installation.
   2. GO TO  4 .

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  4 .

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is the rarely the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to ECM RE-COMMUNICATING FUNCTION .
   1. GO TO  4 .

With CONSULT-II 

1. Turn ignition switch OFF and wait at a least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position with "OD" OFF.
   NOTE: Keep the accelerator pedal as steady as possible during the cruising.
4. Set "OD" ON, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
   NOTE: Never apply brake during releasing the accelerator pedal.
5. Repeat steps 3 to 4 five times.
6. Stop the vehicle and connect CONSULT-II to the vehicle.
7. Make sure that no (1st trip) DTC is displayed in "SELF-DIAG RESULTS" mode.

OK or NG 

1. OK: INSPECTION END 
2. NG: GO TO  21 .

With GST 

1. Turn ignition switch OFF and wait at a least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position with "OD" OFF.
   NOTE: Keep the accelerator pedal as steady as possible during the cruising.
4. Set "OD" ON, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
   NOTE: Never apply brake during releasing the accelerator pedal.
5. Repeat steps 3 to 4 five times.
6. Stop the vehicle and connect GST to the vehicle.
7. Make sure that no (1st trip) DTC is displayed.

OK or NG 

1. OK: INSPECTION END 
2. NG: GO TO 21.

1. Turn ignition switch OFF and disconnect battery ground cable.
2. Disconnect ECM harness connector.
3. Disconnect A/F sensor 1 harness connector.
4. Check harness continuity between the following terminals. Refer to WIRING DIAGRAM  .
   Fig 8: Identifying Air Fuel Ratio (A/F) Sensor 1 Harness Checking Reference Chart

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. Continuity should exist.
5. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 22.
2. NG:
   1. Repair open circuit or short to ground or short to power in harness or connectors between ECM and A/F sensor 1.
   2. GO TO  4 .

1. Reconnect ECM harness connector.
2. Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING  .
   1. GO TO 23.

Perform THROTTLE VALVE CLOSED POSITION LEARNING  .

1. GO TO 24.

Refer to IDLE AIR VOLUME LEARNING  .

Is Idle Air Volume Learning carried out successfully? 

Yes or No 

1. Yes (With CONSULT-II): GO TO 25.
2. Yes (Without CONSULT-II): GO TO  26 .
3. No:
   1. Follow the instruction of Idle Air Volume Learning.
   2. GO TO  4 .

With CONSULT-II 

1. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Select "ENG COOLANT TEMP" in "ACTIVE TEST" mode.
4. Set "ENG COOLANT TEMP" to 5°C (41°F) by touching "DWN" and "Qd".
   Fig 9: Displaying Active Test

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Start engine and rev it (2,000 to 3,000 RPM) two or three times under no load, then run engine at idle speed.
6. Check CO%.
   1. Idle CO: 0.7 - 9.9% and engine runs smoothly. 

OK or NG 

1. OK: GO TO  28 .
2. NG: GO TO  27 .

Without CONSULT-II 

1. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.
2. Turn ignition switch OFF.
3. Disconnect engine coolant temperature sensor harness connector.
4. Connect a resistor (4.4 kohm) between terminals of engine coolant temperature sensor harness connector.
Fig 10: Connecting Resistor Between Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.
5. Start engine and rev it (2,000 to 3,000 RPM) two or three times under no load, then run engine at idle speed.
6. Check CO%.
   1. Idle CO: 0.7 - 9.9% and engine runs smoothly. 
7. After checking CO%, turn ignition switch OFF, disconnect the resistor from the terminals of engine coolant temperature sensor harness connector, and then connect engine coolant temperature sensor harness connector to engine coolant temperature sensor.

OK or NG 

1. OK: GO TO  28 .
2. NG: GO TO 27.

1. Turn ignition switch OFF.
2. Reconnect A/F sensor 1 harness connector.
   1. GO TO  31 .

1. Stop engine.
2. Replace A/F sensor 1 on the malfunctioning bank.
   1. With CONSULT-II: GO TO 29.
   2. Without CONSULT-II: GO TO  30 .

With CONSULT-II 

1. Turn ignition switch OFF and wait at a least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position with "OD" OFF.
   NOTE: Keep the accelerator pedal as steady as possible during the cruising.
4. Set "OD" ON, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
   NOTE: Never apply brake during releasing the accelerator pedal.
5. Repeat steps 3 to 4 five times.
6. Stop the vehicle and connect CONSULT-II to the vehicle.
7. Make sure that no (1st trip) DTC is displayed in "SELF-DIAG RESULTS" mode.

OK or NG 

1. OK: GO TO  4 .
2. NG: GO TO  17 .

With GST 

1. Turn ignition switch OFF and wait at a least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position with "OD" OFF.
   NOTE: Keep the accelerator pedal as steady as possible during the cruising.
4. Set "OD" ON, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
   NOTE: Never apply brake during releasing the accelerator pedal.
5. Repeat steps 3 to 4 five times.
6. Stop the vehicle and connect GST to the vehicle.
7. Make sure that no (1st trip) DTC is displayed.

OK or NG 

1. OK: GO TO  4 .
2. NG: GO TO 31.

Check the following.

• Check fuel pressure regulator, and repair or replace if necessary. Refer to FUEL PRESSURE CHECK  .
• Check mass air flow sensor and its circuit, and repair or replace if necessary. Refer to DTC P0101 MAF SENSOR  and DTC P0102, P0103 MAF SENSOR  .
• Check injector and its circuit, and repair or replace if necessary. Refer to INJECTOR CIRCUIT  .
• Check engine coolant temperature sensor and its circuit, and repair or replace if necessary. Refer to DTC P0117, P0118 ECT SENSOR  and DTC P0125 ECT SENSOR  .

OK or NG 

1. OK: GO TO  33 .
2. NG:
   1. Repair or replace.
   2. GO TO 32.

After this inspection, unnecessary DTC might be displayed.

Erase the stored memory in ECM and TCM. Refer to HOW TO ERASE DTC  and OBD-II DIAGNOSTIC TROUBLE CODE (DTC) or OBD-II DIAGNOSTIC TROUBLE CODE (DTC) .

1. GO TO  4 .

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is the rarely the case.)
2. Perform initialization of NVIS (NATS) system and registration of NVIS (NATS) ignition key IDs. Refer to ECM RE-COMMUNICATING FUNCTION .
   1. GO TO  4 .