1.1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.

Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace ground connection.
2.CHECK SECONDARY AIR INJECTION SYSTEM MAF SENSOR POWER SUPPLY CIRCUIT

1. Disconnect secondary air injection system mass air flow (MAF) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between secondary air injection system MAF sensor harness connector and ground.

   Secondary air injection system MAF sensor | Ground | Voltage
   Connector | Terminal
   E22 | 2 | Ground | Approx. 5 V

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK SECONDARY AIR INJECTION SYSTEM MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between secondary air injection system MAF sensor harness connector and ECM harness connector.

   Secondary air injection system MAF sensor | ECM | Continuity
   Connector | Terminal | Connector | Terminal
   E22 | 3 | F101 | 23 | Existed

4. Also check harness for short to ground and short to power.

Is the inspection result normal?
YES>>GO TO 5.
NO>>GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.

- Harness connectors E3, F1
- Harness for open or short between secondary air injection system MAF sensor and ECM

>>Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK SECONDARY AIR INJECTION SYSTEM MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check the continuity between secondary air injection system MAF sensor harness connector and ECM harness connector.

   Secondary air injection system MAF sensor | ECM | Continuity
   Connector | Terminal | Connector | Terminal
   E22 | 4 | F101 | 24 | Existed

2. Also check harness for short to ground and short to power.

Is the inspection result normal?
YES>>GO TO 7.
NO>>GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.

- Harness connectors E3, F1
- Harness for open or short between secondary air injection system MAF sensor and ECM

>>Repair open circuit, short to ground or short to power in harness or connectors.
7.CHECK SECONDARY AIR INJECTION SYSTEM MAF SENSOR
Refer to Component Inspection (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES>>GO TO 8.
NO>>Replace secondary air injection system MAF sensor.
8.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
>>INSPECTION END