F2–54
FUEL SYSTEM
SUPPLY PUMP INSPECTION
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Caution
• The supply pump is sealed to maintain proper function. Special tools and testers are required
when disassembling the supply pump. Disassembling the supply pump without special tools and
testers will cause a malfunction.
• Consult an authorized DENSO parts distributor for repair if any of the following supply pump parts
are possibly malfunctioning.
1. Supply pump inner parts
2. Suction control valve
3. Fuel temperature sensor
End Of Sie
SUCTION CONTROL VALVE INSPECTION
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Caution
• The supply pump is sealed to maintain proper function. Special tools and testers are required
when disassembling the supply pump. Disassembling the supply pump without special tools and
testers will cause a malfunction.
• Consult an authorized DENSO parts distributor for repair if suction control valve is possibly
malfunctioning.
Resistance Inspection
1. Disconnect the negative battery cable.
2. Disconnect the suction control valve connector.
3. Measure the resistance between the suction
control valve terminals using an ohmmeter.
• If not as specified, repair the supply pump.
(See F2–54 SUPPLY PUMP INSPECTION.)
• If as specified, carry out the “Circuit Open/
Short Inspection”.
Specification
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See F2–64 PCM REMOVAL/INSTALLATION.)
2. Inspect the following wiring harnesses for an open or short circuit (continuity check).
Open circuit
• If there is no continuity, the circuit is open. Repair of replace the harness.
— Suction control valve terminal A (harness-side) and PCM terminal 93
— Suction control valve terminal B (harness-side) and PCM terminal 94
Short circuit
• If there is continuity, the circuit is shorted. Repair or replace the harness.
— Suction control valve terminal A (harness-side) and power supply
— Suction control valve terminal A (harness-side) and GND
— Suction control valve terminal B (harness-side) and power supply
— Suction control valve terminal B (harness-side) and GND
End Of Sie
COMMON RAIL INSPECTION
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Caution
• Do not remove the fuel pressure sensor nor the fuel pressure limiter from the common rail. Since
fuel pressure in the common rail is extremely high, the fuel pressure sensor, fuel pressure limiter,
or the common rail can be damaged, leading to fuel leakage if any of them are removed.
1. Visually inspect the common rail for damage and cracks. Also verify that there is no extreme rust which will
cause fuel leakage.
• If either is observed, replace the common rail.
End Of Sie
Ambient temperature (°C {°F}) Resistance (ohms)
20 {68} Approx. 2.1
SUCTION
CONTROL VALVE
A
B
A6E40122018
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