HAIMA 7 - Page 187

General Precautions of EFI System Maintenance
F-51
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
P0340 P0340
Maintenance tips:
The malfunction has been confirmed, and the
following problems may possibly exist
1) The installation position of phase sensor
improper A
2) 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 installation position of phase sensor A
(angle, and the clearance with phase trigger
wheel)
2) The connection of connector for wire harness of
phase sensor A (biting force of pin, and
oxidation status of pin)
65. P0341 Phase Sensor Bad Contact
Decription 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 the 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
that malfunction exists with phase signal if irregular phase changing signal is detected.
Schematic Circuit:
Malfunction Diagnostic Guide:
Required Equipment: (Diagnostic Instrument with EOBD Diagnostic Function, Digital Multimeter, and
Correct Circuit Diagram)
Characteristic
curve
Signal
of
crankshaft
sensor
Signal
of phase
sensor