DTC DETECTION LOGIC NOTE： If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117, P0118. Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause
P0116 | Engine coolant temperature sensor circuit range/performance | Engine coolant temperature signal from engine coolant temperature sensor does not fluctuate, even when some time has passed after starting the engine with pre-warming up condition. |

- Harness or connectors
  (High or low resistance in the circuit)
- Engine coolant 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.

TEST CONDITION:
Before performing the following procedure, do not fill with the fuel.
>>GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and warm it up to normal operating temperature.
2. Rev engine up to 2,000 rpm for more than 10 minutes.
3. Move the vehicle to a cool place, then stop engine and turn ignition switch OFF.
4. Check resistance between “fuel level sensor unit and fuel pump (main)” terminals 1 and 3.
5. Soak the vehicle until the resistance between “fuel level sensor unit and fuel pump (main)” terminals 1 and 5 becomes 0.5 kΩ higher than the value measured before soaking.
   ■ CAUTION ■
   Never turn ignition switch ON during the soaking time.
   NOTE：
   Soak time changes depending on ambient air temperature. It may take several hours.
6. Start engine and let it idle for 5 minutes.
7. Check 1st trip DTC.

Is 1st trip DTC detected?
YES>>Diagnosis Procedure (GT-R certified NISSAN dealer)
NO>>INSPECTION END