General Precautions of EFI System Maintenance
F-52
Step I: Use diagnostic instrument to read the malfunction information
Read Result I Read Result II
MIL Lamp On P-CODE Present MIL Lamp Off P-CODE Present
P0341
P0341
Maintenance tips:
The malfunction has been confirmed, and the
following problems may possibly exist
1) The connector for wire harness of phase sensor
A not properly connected
Maintenance tips:
The malfunction is not ultimately confirmed and it
may possibly be a random malfunction. Inspect the
following items:
1) The connection of connector for wire harness of
phase sensor A(biting force of pin, and oxidation
status of pin)
66. P0342 Phase Sensor Short to Ground
Description about Malfunction Cause:
The operation principle for phase sensor is to use Hall component to induce a triggered wheel that rotates
along with the camshaft, thus to monitor the position of camshaft. The phase signals received by ECU shall be
changing alternately on a regular basis between high level and low level, and ECU shall determine the circuit
of phase signal to be short to ground if phase signals located at low level are successively detected。
Schematic Circuit:
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function, Digital Multimeter, and
Correct Circuit Diagram)
Step I: Use diagnostic instrument to read the malfunction information
Read Result I Read Result II
MIL Lamp On P-CODE Present MIL Lamp Off P-CODE Present
P0342
P0342
Maintenance tips:
The malfunction has been confirmed, and the
following problems may possibly exist
1) The circuit connected to the Pin 79# of ECU and
the Pin 1# of phase sensor in short circuit
2) The circuit connected to the Pin 79# of ECU and
the ground in short circuit。
Maintenance tips:
The malfunction is not ultimately confirmed and it
may possibly be a random malfunction. Inspect the
following items:
1) Inspect the electric resistance of the circuit for
the Pin 70# of ECU to the ground.
2) Inspect the electric resistance between the circuit
for the Pin 70# of ECU and the circuit for the
Pin 1# of phase sensor.
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