Fuel Pressure Sensor Inspection - Mazda Mazda6 Workshop Manual Supplement

FUEL PRESSURE SENSOR INSPECTION

Note
• Perform the following test only when directed.
Voltage Inspection
1. Start the engine and warm up the engine completely.
2. Measure the voltage between fuel pressure sensor terminals A and B using a voltmeter at idle.
• If not as specified, perform the "Circuit Open/Short Inspection".
— If there is no open/short circuit, replace the common rail.
Specification
1.4—1.7 V
3. Turn off the engine and wait three minutes.
4. Turn the engine switch to ON.
5. Measure the voltage between fuel pressure
sensor terminals A and B using a voltmeter.
• If not as specified, perform the "Circuit Open/
Short Inspection".
— If there is no open/short circuit, replace
the common rail.
Specification
0.9—1.1 V
CIrcuit Open/Short Inspection
1. Inspect for open/short circuit in the following
wiring harnesses.
• If there is open/short circuit, repair or replace wiring harnesses.
Open circuit
• Power circuit
— Fuel pressure sensor terminal C and PCM terminal 90
• Signal circuit
— Fuel pressure sensor terminal B and PCM terminal 61
• GND circuit
— Fuel pressure sensor terminal A and PCM terminal 91
Short circuit
• Power circuit
— Fuel pressure sensor terminal C and PCM terminal 90 to GND
• Signal circuit
— Fuel pressure sensor terminal B and PCM terminal 61 to power circuit
— Fuel pressure sensor terminal B and PCM terminal 61 to GND
End Of Sie
CONTROL SYSTEM
FUEL PRESSURE SENSOR
HARNESS SIDE CONNECTOR
C B A
A6E404013015201
F2
A6E40702049
F2–79