1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection B214. Refer to Ground Inspection in Circuit Inspection.

Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace ground connection.
2.CHECK SUB FUEL PUMP RELAY POWER SUPPLY CIRCUIT-I

1. Disconnect sub fuel pump relay.
2. Turn ignition switch ON.
3. Check the voltage between sub fuel pump relay harness connector and ground.

   Sub fuel pump relay | Ground | Voltage
   Connector | Terminal
   B242 | 1 | Ground | Battery voltage
   3

Is the inspection result normal?
YES>>GO TO 4.
NO>>GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.

- 10A fuse (No.42)
- 15A fuse (No.16)
- Harness connectors E106, M6
- Harness connectors B201, M117
- Harness for open or short between sub fuel pump relay and IPDM E/R
- Harness for open or short between sub fuel pump relay and fuse block (J/B)

>>Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK SUB FUEL PUMP RELAY POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between sub fuel pump relay harness connector and ECM harness connector.

   Sub fuel pump relay | ECM | Continuity
   Connector | Terminal | Connector | Terminal
   B242 | 2 | M107 | 126 | Existed

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

Is the inspection result normal?
YES>>GO TO 6.
NO>>GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.

- Harness connectors B201, M117
- Harness for open or short between sub fuel pump relay and ECM

>>Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK SUB FUEL PUMP RELAY
Refer to Component Inspection (SUB FUEL PUMP RELAY) (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES>>GO TO 7.
NO>>Replace sub fuel pump relay.
7.CHECK SUB FUEL PUMP POWER SUPPLY CIRCUIT

1. Disconnect “fuel level sensor unit and fuel pump (sub fuel pump)” harness connector.
2. Check the continuity between sub fuel pump relay harness connector and “fuel level sensor unit and fuel pump (sub fuel pump)” harness connector.

   Sub fuel pump relay | Fuel level sensor unit and fuel pump (sub fuel pump) | Continuity
   Connector | Terminal | Connector | Terminal
   B242 | 5 | B226 | 1 | Existed

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

Is the inspection result normal?
YES>>GO TO 8.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK SUB FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT

1. Check the continuity between “fuel level sensor unit and fuel pump (sub fuel pump)” harness connector and ground.

   Fuel level sensor unit and fuel pump (sub fuel pump) | Ground | Continuity
   Connector | Terminal
   B226 | 2 | Ground | Existed

2. Also check harness for short to power.

Is the inspection result normal?
YES>>GO TO 9.
NO>>Repair open circuit or short to power in harness or connectors.
9.CHECK SUB FUEL PUMP INPUT CIRCUIT FOR OPEN AND SHORT-I

1. Check the continuity between sub fuel pump relay harness connector and ECM harness connector.

   Sub fuel pump relay | ECM | Continuity
   Connector | Terminal | Connector | Terminal
   B242 | 5 | F102 | 93 | Existed

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

Is the inspection result normal?
YES>>GO TO 11.
NO>>GO TO 10.
10.DETECT MALFUNCTIONING PART
Check the following.

- Harness connectors F103, M116
- Harness connectors B201, M117
- Harness for open or short between sub fuel pump relay and ECM

>>Repair open circuit, short to ground or short to power in harness or connectors.
11.CHECK SUB FUEL PUMP INPUT CIRCUIT FOR OPEN AND SHORT-II

1. Disconnect condenser harness connector.
2. Check the continuity between sub fuel pump relay harness connector and condenser harness connector.

   Sub fuel pump relay | Condenser | Continuity
   Connector | Terminal | Connector | Terminal
   B242 | 5 | B229 | 1 | Existed

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

Is the inspection result normal?
YES>>GO TO 12.
>>Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK SUB FUEL PUMP INPUT CIRCUIT FOR OPEN AND SHORT-III

1. Check the continuity between “fuel level sensor unit and fuel pump (sub fuel pump)” harness connector and ECM harness connector.

   Fuel level sensor unit and fuel pump (sub fuel pump) | ECM | Continuity
   Connector | Terminal | Connector | Terminal
   B226 | 2 | F102 | 94 | Existed

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

Is the inspection result normal?
YES>>GO TO 14.
NO>>GO TO 13.
13.DETECT MALFUNCTIONING PART
Check the following.

- Harness connectors F103, M116
- Harness connectors B201, M117
- Harness for open or short between sub fuel pump and ECM

>>Repair open circuit, short to ground or short to power in harness or connectors.
14.CHECK SUB FUEL PUMP INPUT CIRCUIT FOR OPEN AND SHORT-IV

1. Check the continuity between “fuel level sensor unit and fuel pump (sub fuel pump)” harness connector and condenser harness connector.

   Fuel level sensor unit and fuel pump (sub fuel pump) | Condenser | Continuity
   Connector | Terminal | Connector | Terminal
   B226 | 2 | B229 | 2 | Existed

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

Is the inspection result normal?
YES>>GO TO 15.
>>Repair open circuit, short to ground or short to power in harness or connectors.
15.CHECK CONDENSER
Refer to Component Inspection (Condenser) (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES>>GO TO 16.
NO>>Replace condenser.
16.CHECK SUB FUEL PUMP
Refer to Component Inspection (SUB FUEL PUMP) (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES>>GO TO 17.
NO>>Replace main fuel level sensor unit, fuel filter and fuel pump assembly.
17.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
>>INSPECTION END