DTC DETECTION LOGIC

DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause
P0643 | Sensor power supply circuit short | ECM detects that the voltage of power source for sensor is excessively low or high. |

- Harness or connectors
  (APP sensor 1 circuit is shorted.)
  (TP sensor circuit is shorted.)
  [CMP sensor (PHASE) (bank 1) circuit is shorted.]
  (Turbocharger boost sensor circuit is shorted.)
  (EVAP control system pressure sensor circuit is shorted.)
- Accelerator pedal position sensor
- Throttle position sensor
- Camshaft position sensor (PHASE) (bank 1)
- Turbocharger boost sensor
- EVAP control system pressure 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.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
>>GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 1 second.
2. Check DTC.

Is DTC detected?
YES>>Go to Diagnosis Procedure (GT-R certified NISSAN dealer).
NO>>INSPECTION END