Mazda Protege 5. Manual — part 169

CONTROL SYSTEM [ZM]

01–40A–29

01–40A

Circuit Open/Short Inspection

1. Remove the PCM. (See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
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 C and PCM connector terminal 89)

•

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

Short circuit

•

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

•

TP signal circuit (TP sensor connector
terminal C and PCM connector terminal 89 to
GND)

5. Reconnect the TP sensor connector.

End Of Sie

X3U140WBN

X3U140WA6

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CONTROL SYSTEM [ZM]

01–40A–30

THROTTLE POSITION (TP) SENSOR REMOVAL/INSTALLATION [ZM]

A3U014018910W03

1. Disconnect the TP sensor connector.
2. Remove the TP sensor screws.
3. Remove the TP sensor from the throttle body.
4. Verify that the throttle valve is fully closed.
5. Install the TP sensor to the throttle body.
6. Tighten the TP sensor screws.

Tightening torque

1.6—2.3 N·m {16—24 kgf·cm, 14—20 in·lbf}

7. Verify that the throttle valve moves smoothly.
8. Reconnect the TP sensor connector.

End Of Sie

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

A3U014018840W03

Warning

••••

When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before
removing or installing 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.
4. Replace the gasket.
5. Install in the reverse order of removal.
6. Refill the engine coolant. (See 01–12–2

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

End Of Sie

X3U140WA7

Y3U140WA1

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CONTROL SYSTEM [ZM]

01–40A–31

01–40A

ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [ZM]

A3U014018840W04

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 are 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

Z3U0140W025

Z3U0140W022

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CONTROL SYSTEM [ZM]

01–40A–32

Circuit Open/Short Inspection

1. Remove the PCM. (See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
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)

•

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

5. Install the ECT sensor.

End Of Sie

CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [ZM]

A3U014018230W03

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 plate teeth and the CKP sensor using a feeler gauge.

•

If not as specified, adjust the CKP sensor or inspect the plate teeth for being twisted and/or chipped.

•

If any of the plate teeth is twisted and/or chipped, replace the plate. (See 01–40A–34 PLATE REMOVAL/
INSTALLATION [ZM].)

Specification

0.5—1.5 mm {0.020—0.059 in}

X3U140WBN

Z3U0140W026

X3U140WAB

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