Mazda Protege 5. Manual — part 150

FUEL SYSTEM

01–14–25

01–14

Open circuit

•

GND circuit (No.1 cylinder fuel injector connector terminal B and PCM connector terminal 75)

•

GND circuit (No.2 cylinder fuel injector connector terminal B and PCM connector terminal 101)

•

GND circuit (No.3 cylinder fuel injector connector terminal B and PCM connector terminal 74)

•

GND circuit (No.4 cylinder fuel injector connector terminal B and PCM connector terminal 100)

•

Power circuit (No.1 cylinder fuel injector connector terminal A and main relay connector terminal D through
common connector)

•

Power circuit (No.2 cylinder fuel injector connector terminal A and main relay connector terminal D through
common connector)

•

Power circuit (No.3 cylinder fuel injector connector terminal A and main relay connector terminal D through
common connector)

•

Power circuit (No.4 cylinder fuel injector connector terminal A and main relay connector terminal D through
common connector)

Short circuit

•

No.1 cylinder fuel injector connector terminal B and PCM connector terminal 75 to GND

•

No.2 cylinder fuel injector connector terminal B and PCM connector terminal 101 to GND

•

No.3 cylinder fuel injector connector terminal B and PCM connector terminal 74 to GND

•

No.4 cylinder fuel injector connector terminal B and PCM connector terminal 100 to GND

5. Repair or replace faulty areas.
6. Reconnect the fuel injector connectors.
7. Reconnect the battery negative cable.

Fuel Leakage Test

Warning

••••

Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and
damage. Always carry out the following procedure with the engine stopped.

Note

•

Perform the following test only when directed.

1. Complete the “BEFORE REPAIR PROCEDURE”. (See 01–14–4 BEFORE REPAIR PROCEDURE.)
2. Disconnect the battery negative cable.
3. Remove the fuel injectors together with the fuel distributor. (See 01–14–21 FUEL INJECTOR REMOVAL/

INSTALLATION.)

4. Fasten the fuel injectors firmly to the fuel

distributor with wires.

5. Connect the battery negative cable.

Caution

••••

Connecting to the wrong DLC terminal
may possibly cause a malfunction.
Carefully connect to the specified
terminal only.

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FUEL SYSTEM

01–14–26

6. Short the DLC terminal F/P to the body GND using a jumper wire.
7. Turn the ignition switch to ON to operate the fuel pump body.
8. Tilt the fuel injectors approx. 60 degrees and verify that fuel leakage from the fuel injector nozzles is within the

specification.

•

If not as specified, replace the fuel injector.

Fuel leakage

Less than 1 drop/2 min

9. Turn the ignition switch off and remove the

jumper wire.

10. Complete the “AFTER REPAIR PROCEDURE”.

(See 01–14–5 AFTER REPAIR PROCEDURE.)

Volume Test

Warning

••••

Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and
damage. Always carry out the following procedure with the engine stopped.

Note

•

Perform the following test only when directed.

•

If you have an after market fuel injector tester or SST (49 L018 901), perform this inspection.

•

If there is no an after market fuel injector tester available, perform “Simulation Test”, “Resistance
Inspection”, and “Fuel Leakage Inspection” to verify whether the fuel injector is okay or not.

1. Complete the “BEFORE REPAIR PROCEDURE”. (See 01–14–4 BEFORE REPAIR PROCEDURE.)
2. Disconnect the battery negative cable.

Using the SST

1. Remove the fuel injectors together with the fuel distributor with connected to fuel hose. (See 01–14–21 FUEL

INJECTOR REMOVAL/INSTALLATION.

2. Fasten the fuel injectors firmly to the fuel distributor with wires.
3. Connect the fuel injector to the SST or the fuel

injector tester as shown in the figure.

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FUEL SYSTEM

01–14–27

01–14

4. Connect the battery negative cable.

Caution

••••

Connecting to the wrong DLC terminal
may possibly cause a malfunction.
Carefully connect to the specified
terminal only.

5. Short the DLC terminal F/P to body GND using a

jumper wire.

6. Turn the ignition switch to ON.
7. Measure the injection volume of each fuel injector

using a graduated container.

•

If not as specified, replace the fuel injector.

Injection volume

ZM: 38.1—40.4 ml {38.1—40.4 cc, 1.29—1.36 fl oz}/15 s
FS: 68—75 ml {68—75 cc, 2.30—2.53 fl oz}/15 s

8. Turn the ignition switch to LOCK.
9. Disconnect the battery negative cable.

10. Disconnect the SST or the fuel injector tester from the fuel injector.
11. Disconnect the jumper wire.
12. Complete the “AFTER REPAIR PROCEDURE”. (See 01–14–5 AFTER REPAIR PROCEDURE.)

Using a Fuel Injector Tester

1. Remove the fuel injectors. (See 01–14–21 FUEL INJECTOR REMOVAL/INSTALLATION.)
2. Connect the fuel injector to a fuel injector tester.
3. Measure the injection volume of each fuel injector.

•

If not as specified, replace the fuel injector.

Injection volume

ZM: 38.1—40.4 ml {38.1—40.4 cc, 1.29—1.36 fl oz}/15 s
FS: 68—75 ml {68—75 cc, 2.3—2.5 fl oz}/15 s

4. Complete the “AFTER REPAIR PROCEDURE”. (See 01–14–5 AFTER REPAIR PROCEDURE.)

End Of Sie

PRESSURE REGULATOR REMOVAL/INSTALLATION

A3U011413280W01

Caution

••••

Disconnecting/connecting the quick release connector without cleaning it may possibly cause
damage to the fuel pipe and quick release connector. Always clean the quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.

1. Complete the “BEFORE REPAIR PROCEDURE”. (See 01–14–4 BEFORE REPAIR PROCEDURE.)
2. Disconnect the battery negative cable.

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FUEL SYSTEM

01–14–28

3. Remove in the order indicated in the table.

4. Install in the reverse order of removal.
5. Complete the “AFTER REPAIR PROCEDURE”.

(See 01–14–5 AFTER REPAIR PROCEDURE.)

End Of Sie

PRESSURE REGULATOR INSPECTION

A3U011413280W02

Caution

••••

Disconnecting/connecting the quick release connector without cleaning it may possibly cause
damage to the fuel pipe and quick release connector. Always clean the quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Simulation Test

1. Carry out the “FUEL PRESSURE INSPECTION”. (See 01–14–6 FUEL PRESSURE INSPECTION.)

•

If not as specified, perform the further inspection for the pressure regulator.

Operation Inspection

Note

•

Perform the following test only when directed.

1. Complete the “BEFORE REPAIR PROCEDURE”. (See 01–14–4 BEFORE REPAIR PROCEDURE.)
2. Disconnect the battery negative cable.
3. Disconnect the quick release connector from the pulsation damper as follows:

(1) Push apart the lock clip and unlock it.

1

Vacuum hose

2

Plastic fuel hose
(See 01–14–22 Plastic Fuel Hose Removal Note)
(See 01–14–23 Plastic Fuel Hose Installation Note)

3

Pressure regulator

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