Mazda CX-5 Service & Repair Manual: Fuel Pump Control

Mazda CX-5 Service & Repair Manual / Engine / Fuel / Fuel Pump Control

Outline

By switching the fuel pump discharge amount, reduced power consumption and improved fuel economy have been realized.
The PCM determines the optimum fuel pump drive force according to the engine operation conditions, and sends the fuel pump drive signal to the fuel pump control module.

Block Diagram

Operation

Fuel pump relay

The PCM switches the fuel pump relay on/off according to the engine operation conditions.


Relay ON/OFF	Control conditions
ON	When any of the following conditions is met: When ignition is switched ON (for approx. 1 s) During engine cranking While engine is running
OFF	When engine is stopped

Fuel pump control module

The PCM determines the fuel pump discharge amount according to the engine operation conditions, and controls the output duty ratio to the fuel pump control module according to the discharge amount.


Output duty ratio	Control conditions
95%	When any of the following conditions is met: At engine start Fuel pump control module malfunction (if request voltage is unobtainable)
10—90%	Feedback value from fuel pressure sensor is the specified value or more (Determined that high pressure fuel pump compression is high.) Except for control conditions with output duty ratio of 5% or 95%
5%	When engine is stopped

Fuel pump operation circuit diagram

Fuel Pump Control Module

Purpose, Function Controls the voltage applied to the fuel pump for reducing fuel pump load and improving fuel economy. Controls the voltage applied to the fuel pump based on the con ...

Fuel Pump Unit Disassembly/Assembly

WARNING: Fuel is very flammable liquid. If fuel spills or leaks from the pressurized fuel system, it will cause serious injury or death and facility breakage. Fuel can also irritate skin ...

Other materials:

Glass Antenna Inspection
1. Disconnect the negative battery cable.. 2. Partially peel back the seaming welt. 3. Remove the liftgate upper trim.. 4. Disconnect antenna feeder No.3 connector.. 5. Visually inspect the glass antenna for damage. 6. Verify that the continuity between the glass antenna terminals is as in ...

Fuel Injector
Purpose, Function Promotes atomization of fuel by injecting it from the multiple holes. Injects fuel according to the control signal from the PCM. Construction The fuel injector is installed to the cylinder head. The fuel injector has multiple injection hole ...

St 001/12 Special Service Tool Shipment January 2013
APPLICABLE MODEL(S)/VINS 2014 Mazda6 2014 CX-5 DESCRIPTION/PRICING In support of the new 2014 Mazda6 and the 2014 CX-5, Mazda will ship to all dealers one (1) new Special Service Tool (SST). The SST will be shipped automatically by Mazda’s tool vendor, SPX during January 2013. The followi ...