Fuel Pressure Sensor Removal/Installation; Fuel Pressure Sensor - Mazda CX-7 2007 Workshop Manual

1. Disconnect the PCM connector. (See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH TC].)
2. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)
Open circuit
• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
— APP sensor terminal A and PCM terminal 1AJ
— APP sensor terminal B and PCM terminal 1AV
— APP sensor terminal C and PCM terminal 1AC
— APP sensor terminal D and PCM terminal 1Q
— APP sensor terminal E and PCM terminal 1U
— APP sensor terminal F and PCM terminal 1Y
Short circuit
• If there is continuity, there is a short circuit. Repair or replace the wiring harness.
— APP sensor terminal A and body ground
— APP sensor terminal B and power supply
— APP sensor terminal C and power supply
— APP sensor terminal C and body ground
— APP sensor terminal D and body ground
— APP sensor terminal E and power supply
— APP sensor terminal F and power supply
— APP sensor terminal F and body ground
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FUEL PRESSURE SENSOR REMOVAL/INSTALLATION[L3 WITH TC] WM: FUEL PRESSURE SENSOR
Note
• If the fuel pressure sensor is removed, do not reuse the fuel pressure sensor and the fuel delivery pipe.
When you replace the fuel pressure sensor, replace a new fuel delivery pipe with a new fuel pressure
sensor. (See 01-14-23 FUEL INJECTOR REMOVAL/INSTALLATION[L3 WITH TC])
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FUEL PRESSURE SENSOR INSPECTION[L3 WITH TC]
Note
• Before performing the following inspection, make sure to follow the procedure as indicated in the
troubleshooting flowchart. (See 00-00-3 HOW TO USE THIS MANUAL.)
1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position (Engine
off).
3. Select the FUEL_PRES PID on the M-MDS.
4. After warming up the engine, verify that the
FUEL_PRES PID is at the standard value under
the following conditions.
— If not as verified, replace the fuel delivery
pipe.
Step Condition
• Idle
1
• 90 s after engine is
started
• Idle
2
• Spill valve solenoid
valve connector is
disconnected
5. After connecting the spill valve control solenoid valve connector, clear the DTC.
CONTROL SYSTEM [L3 WITH TC]
FUEL_PRES PID
Approx. 3 MPa
Approx. 530 kPa
DLC-2
01-40–35
01-40
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