DTC Detection Logic
NOTE:
If DTC P1078 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
DTC LOGIC . DTC DETECTION LOGIC TABLE
| DTC No. |
Trouble diagnosis name |
DTC detecting condition |
Possible cause |
| P1078 |
Exhaust valve timing control position sensor (bank 1) circuit |
An excessively high or low voltage from the sensor is sent to ECM. |
- Harness or connectors [Exhaust valve timing control position sensor (bank 1) circuit is open or shorted)
(Accelerator pedal position sensor 2 circuit is shorted.)
(Battery current sensor circuit is shorted.)
[Camshaft position sensor (bank 1) circuit is shorted.]
(Crankshaft position sensor circuit is shorted.)
(EVAP control system pressure sensor circuit is shorted.)
(Manifold pressure sensor circuit is shorted.)
- Exhaust valve timing control position sensor
- Accelerator pedal position sensor
- Battery current sensor
- Camshaft position sensor (bank 1)
- Crankshaft position sensor
- EVAP control system pressure sensor
- Manifold pressure sensor
- Accumulation of debris to the signal pick-up portion of the camshaft
|
| P1084 |
Exhaust valve timing control position sensor (bank 2) circuit |
- Harness or connectors [Exhaust valve timing control position sensor (bank 2) circuit is open or shorted)
- Exhaust valve timing control position sensor (bank 2)
- Crankshaft position sensor
- Camshaft position sensor (bank 2)
- Accumulation of debris to the signal pick-up portion of the camshaft
|