FUEL SYSTEM
01–14–9
01–14
FUEL PUMP SPEED CONTROL RELAY FUNCTION
CHU011413350S06
• Supplies power to the fuel pump according to control signals from the PCM.
• For fuel pump speed control, refer to CONTROL SYSTEM, FUEL PUMP SPEED CONTROL. (See 01–40–23
FUEL PUMP CONTROL OUTLINE, 01–40–24 FUEL PUMP CONTROL BLOCK DIAGRAM, 01–40–24 FUEL
PUMP CONTROL OPERATION.)
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FUEL PUMP SPEED CONTROL RELAY OPERATION
CHU011413350S07
• Reduces voltage by routing it through the fuel pump resistor to protect the fuel pump when required fuel
amount is low due to low engine speed.
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FUEL PUMP RESISTOR FUNCTION
CHU011413350S08
• Supplies voltage to the fuel pump via the fuel pump resistor to protect the fuel pump when the injection amount
is low (when engine speed is low).
• A fuel pump resistor with a resistance of 0.304—0.336 ohms has been adopted.
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MAIN FUSE BLOCK
FUEL PUMP SPEED
CONTROL RELAY
CHU0114W012
PCM
PCM
5P
4M
B
5P
4M
B
FUEL PUMP SPEED CONTROL RELAY OFF
FUEL PUMP RELAY
FUEL PUMP SPEED
CONTROL RELAY
FUEL PUMP
RESISTOR
FUEL PUMP
: CURRENT FLOW
FUEL PUMP SPEED CONTROL RELAY ON
FUEL PUMP RELAY
FUEL PUMP SPEED
CONTROL RELAY
FUEL PUMP
RESISTOR
FUEL PUMP
CHU0114S013
FUEL PUMP RESISTER
CHU0114S007
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