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}
X3U140WE8
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