DTC DETECTION LOGIC

DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause
P0101 | Mass air flow sensor (bank 1) circuit range/performance | A) | A high voltage from the sensor is sent to ECM under light load driving condition. |

- Harness or connectors
  (The sensor circuit is open or shorted.)
- Mass air flow sensor
- EVAP control system pressure sensor

B) | A low voltage from the sensor is sent to ECM under heavy load driving condition. |

- Harness or connectors
  (The sensor circuit is open or shorted.)
- Intake air leaks
- Mass air flow sensor
- EVAP control system pressure sensor
- Intake air temperature sensor

P010B | Mass air flow sensor (bank 2) circuit range/performance | A) | A high voltage from the sensor is sent to ECM under light load driving condition. |

- Harness or connectors
  (The sensor circuit is open or shorted.)
- Mass air flow sensor
- EVAP control system pressure sensor

B) | A low voltage from the sensor is sent to ECM under heavy load driving condition. |

- Harness or connectors
  (The sensor circuit is open or shorted.)
- Intake air leaks
- Mass air flow sensor
- EVAP control system pressure sensor
- Intake air temperature sensor

DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

NOTE：
If engine will not start or stops soon, wait at least 10 seconds with engine stopped (Ignition switch ON) instead of running engine at idle speed.
>>GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

1. Start engine and warm it up to normal operating temperature.
2. Run engine for at least 10 seconds at idle speed.
3. Check 1st trip DTC.

Is 1st trip DTC detected?
YES>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
NO-1>>With CONSULT-III: GO TO 3.
NO-2>>Without CONSULT-III: GO TO 5.
3.CHECK MASS AIR FLOW SENSOR FUNCTION

1. Turn ignition switch ON.
2. Start engine and warm it up to normal operating temperature.If engine cannot be started, go to Diagnosis Procedure (GT-R certified NISSAN dealer).
3. Select “MAS A/F SE-B1/B2” in “DATA MONITOR” mode with CONSULT-III.
4. Check the voltage of “MAS A/F SE-B1/B2”.
5. Increases engine speed to about 4,000 rpm.
6. Monitor the linear voltage rise in response to engine speed increases.

Is the inspection result normal?
YES>>GO TO 4.
NO>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B

1. Maintain the following conditions for at least 10 consecutive seconds.

   ENG SPEED | More than 1,400 rpm
   TP SEN 1-B1 | More than 1.0 V
   TP SEN 2-B1 | More than 1.0 V
   TP SEN 1-B2 | More than 1.0 V
   TP SEN 2-B2 | More than 1.0 V
   Selector lever | Suitable position
   Driving location | Driving vehicle uphill (Increased engine load) will help maintain the driving conditions required for this test.

   ■ CAUTION ■
   Always drive vehicle at a safe speed.
2. Check 1st trip DTC.

Is 1st trip DTC detected?
YES>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
NO>>INSPECTION END
5.PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B
Perform component function check. Refer to Component Function Check (GT-R certified NISSAN dealer).
NOTE：
Use component function check to check the overall function of the mass air flow sensor circuit. During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).