Mazda Protege 5. Manual - part 180

 

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Mazda Protege 5. Manual - part 180

 

 

CONTROL SYSTEM [FS]

01–40B–29

01–40B

Short circuit

MAF signal circuit (MAF sensor connector terminal B and PCM connector terminal 88 to GND)

Power circuit (MAF sensor connector terminal C and main relay terminal D through common connector to 
GND)

5. Reconnect the MAF sensor connector.

Note

The scan tool shows the MAF rate and load value.

Specification

*

1

: 650—750  rpm

*

2

: No load, neutral or P position

End Of Sie

THROTTLE POSITION (TP) SENSOR INSPECTION [FS]

A3U014018910W01

Resistance Inspection

Note

Perform the following test only when directed.

1. Inspect throttle valve CTP and accelerator cable free play (See 01–13B–17 ACCELERATOR CABLE 

INSPECTION [FS].)

If as specified, inspect resistance of the TP sensor.

2. Disconnect the TP sensor connector.
3. Measure the resistance between the TP sensor terminals A and C using an ohmmeter.

If not as specified, replace the TP sensor. (See 01–13B–6 INTAKE-AIR SYSTEM REMOVAL/
INSTALLATION [FS].)

If as specified, but PID value or PCM terminal 89 voltage is out of specification, carry out the “Circuit Open/
Short Inspection”.

Specification

4—6 kilohms

Intake MAF (g/s)

Engine load 

calculated value (%)

MTX

ATX

MTX

ATX

Idle*

1

1.6—2.5

1.8—2.6

13.0—

18.0

14.5—

19.0

Engine 
speed 
2,500 
rpm*

2

6.2—7.4

6.5—7.9

12.5—

17.0

13.0—

17.0

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CONTROL SYSTEM [FS]

01–40B–30

Circuit Open/Short Inspection

1. Remove the PCM. (See 01–40B–7 PCM REMOVAL/INSTALLATION [FS].)
2. Connect the SST (104 Pin Breakout Box) to the 

PCM as shown.

3. Tighten the connector attaching screw.

Tightening torque

7.9—10.7 N·m 

{80—110 kgf·cm, 69.5—95.4 in·lbf}

4. Inspect for an open or short circuit in the following 

wiring harnesses by probing the applicable 
sensor and SST (104 Pin Breakout Box) terminals 
with ohmmeter leads.

If there is an open or short circuit, repair or 
replace wiring harnesses.

If there is no open or short circuit, replace the TP sensor.

Open circuit

Constant voltage circuit (TP sensor connector terminal A and PCM connector terminal 90)

TP signal circuit (TP sensor connector terminal B and PCM connector terminal 89)

GND circuit (TP sensor connector terminal C and PCM connector terminal 91)

Short circuit

Constant voltage circuit (TP sensor connector 
terminal A and PCM connector terminal 90)

TP signal circuit (TP sensor connector 
terminal B and PCM connector terminal 89)

5. Reconnect the TP sensor connector.

End Of Sie

ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [FS]

A3U014018840W01

Warning

••••

When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before 
removing the ECT sensor.

1. Drain the engine coolant. (See 01–12–2 COOLING SYSTEM SERVICE WARNINGS.) (See 01–12–3 ENGINE 

COOLANT REPLACEMENT.)

2. Disconnect the ECT sensor connector.
3. Remove the ECT sensor using the SST.
4. Replace the gasket.
5. Install in the reverse order of removal.

Tightening torque

16—23 N·m 

{1.6—2.4 kgf·m, 12—17 ft·lbf}

6. Refill the engine coolant. (See 01–12–2 

COOLING SYSTEM SERVICE WARNINGS.) 
(See 01–12–3 ENGINE COOLANT 
REPLACEMENT.)

End Of Sie

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CONTROL SYSTEM [FS]

01–40B–31

01–40B

ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [FS]

A3U014018840W02

Note

Perform the following test only when directed.

ECT Sensor Resistance Inspection

1. Drain the engine coolant. (See 01–12–2 COOLING SYSTEM SERVICE WARNINGS.) (See 01–12–3 ENGINE 

COOLANT REPLACEMENT.)

2. Remove the ECT sensor.
3. Place the ECT sensor in water with a 

thermometer, and heat the water gradually.

4. Measure the resistance between the ECT sensor 

terminals A and B using an ohmmeter.

If not as specified, replace the ECT sensor.

If the ECT sensor is okay, but PID value or 
PCM terminal 38 voltage is out of 
specification, carry out the “Circuit Open/
Short Inspection”.

Specification

ECT sensor signal characteristic (reference)

Water temperature (

°°°°

C {

°°°°

F})

Resistance (kilohm)

20 {68}

2.2—2.6

80 {176}

0.29—0.34

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CONTROL SYSTEM [FS]

01–40B–32

Circuit Open/Short Inspection

1. Remove the PCM. (See 01–40B–7 PCM REMOVAL/INSTALLATION [FS].)
2. Connect the SST (104 Pin Breakout Box) to the 

PCM as shown.

3. Tighten the connector attaching screw.

Tightening torque

16—23 N·m 

{1.6—2.4 kgf·m, 12—17 ft·lbf}

4. Inspect for an open or short circuit in the following 

wiring harnesses by probing the applicable 
sensor and SST (104 Pin Breakout Box) terminals 
with ohmmeter leads.

If there is an open or short circuit, repair or 
replace wiring harnesses.

If there is no open or short circuit, replace the ECT sensor.

Open circuit

ECT signal circuit (ECT sensor connector terminal A and PCM connector terminal 38 through common 
connector)

GND circuit (ECT sensor connector terminal B and PCM connector terminal 91)

Short circuit

ECT signal circuit (ECT sensor connector 
terminal A and PCM connector terminal 38 to 
GND)

5. Install the ECT sensor.

End Of Sie

CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [FS]

A3U014018230W01

Air Gap Inspection

Note

Perform the following test only when directed.

1. Verify that the CKP sensor is installed properly.
2. Measure the air gap between the crankshaft pulley teeth and the CKP sensor using a feeler gauge.

If not as specified, replace the CKP sensor or inspect the crankshaft pulley teeth for being twisted and/or 
chipped.

If any of the crankshaft pulley teeth is twisted and/or chipped, replace the crankshaft pulley (See 01–10B–
10 Crankshaft Pulley Removal Note.)

Specification

0.5—1.5 mm {0.020—0.059 in}

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