Mazda Protege 5. Manual — part 182
CONTROL SYSTEM [FS]
01–40B–37
01–40B
KNOCK SENSOR REMOVAL/INSTALLATION [FS]
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1. Disconnect the knock sensor connector.
2. Remove the knock sensor.
3. Install in the reverse order of removal.
Tightening torque
19.6—34.3 N·m {2.00—3.49 kgf·m, 14.5—25.2 ft·lbf}
End Of Sie
HEATED OXYGEN SENSOR (HO2S) INSPECTION [FS]
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HO2S (Front and Rear) Voltage Inspection
Note
•
Perform the following test only when directed.
1. Warm up the engine and run it at idle.
2. Disconnect the HO2S (Front or Rear) connector.
3. Connect a voltmeter test leads to the following HO2S terminals:
•
(+) lead—HO2S terminal A
•
(–) lead—HO2S terminal B
4. Run the engine at 3,000 rpm until the voltmeter
indicates approx. 0.5—0.7 V.
5. Verify that the voltmeter needle moves when the
engine speed increases and decreases suddenly
several times.
•
If not as specified, replace the HO2S.
•
If the HO2S is okay, but PID value or PCM
terminal 60 (Front), 35 (Rear) voltage are out
of specification, carry out the “Circuit Open/
Short Inspection”.
Specification
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 HO2S.
Engine condition
Voltage (V)
Acceleration
0.5—1.0
Deceleration
0—0.5
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CONTROL SYSTEM [FS]
01–40B–38
Open circuit
•
HO2S signal circuit (HO2S connector terminal
A and PCM connector terminal 60 (Front), 35
(Rear))
•
GND circuit (HO2S connector terminal B and
PCM connector terminal 91)
Short circuit
•
HO2S signal circuit (HO2S terminal A and
PCM connector terminal 60 (Front), 35 (Rear)
to GND)
5. Reconnect the HO2S connector.
HO2S Heater (Front and Rear) Resistance Inspection
1. Disconnect the HO2S (Front or Rear) connector.
2. Measure the resistance between HO2S terminals C and D using an ohmmeter.
•
If not as specified, replace the HO2S.
•
If the HO2S heater is okay, but PID value or PCM terminal 94 (Front), 93 (Rear) voltage are out of
specification, carry out the “Circuit Open/Short Inspection”.
Specification
Front: Approx. 5.6 ohms
Rear: Approx. 15.7 ohms
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 HO2S.
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CONTROL SYSTEM [FS]
01–40B–39
01–40B
Open circuit
•
Control circuit (HO2S connector terminal C
and ignition switch (IG1) circuit through
common connector)
•
GND circuit (HO2S connector terminal D and
PCM connector terminal 94 (Front), 93
(Rear))
Short circuit
•
Control circuit (HO2S connector terminal C
and ignition switch (IG1) circuit through
common connector to GND)
•
GND circuit (HO2S connector terminal D and
PCM connector terminal 94 (Front), 93 (Rear)
to GND)
5. Reconnect the HO2S connector.
End Of Sie
EGR BOOST SENSOR INSPECTION [FS]
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Note
•
Perform the following test only when directed.
•
The following vacuum values are indicated by relative pressure from barometric pressure.
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 bolt.
Tightening torque
7.9—10.7 N·m
{80—110 kgf·cm, 69.5—95.4 in·lbf}
Caution
••••
Do not apply vacuum outside of the
specified limits, or the EGR boost sensor
will be damaged.
4. Turn the ignition switch to ON.
5. Disconnect the vacuum hose between the EGR
boost sensor and intake manifold.
Note
•
The output voltage varies with the
measuring condition.
6. Verify that the PCM 34 terminal voltage is within
specification.
Measuring condition:
Input voltage: 4.5—5.5 V
Ambient temperature: 10—50
°°°°
C {50—122
°°°°
F}
Sea level: –20—3,000 m {–656—9,840 ft}
Specification
Measuring voltage: 2.3—4.7 V
7. Apply vacuum of –26.6 kPa {–200 mmHg, –7.85 inHg} to EGR boost sensor and verify that the PCM 34
terminal voltage variation from the specified voltage in Step 6 is within specification.
•
If not as specified, carry out the “Circuit Open/Short Inspection”.
Specification
Monitoring voltage variation: 0.8—1.3 V
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CONTROL SYSTEM [FS]
01–40B–40
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 EGR boost sensor.
Open circuit
•
EGR boost (Barometric pressure) signal circuit (EGR boost sensor connector terminal A and PCM
connector terminal 34)
•
Constant voltage circuit (EGR boost sensor connector terminal C and PCM connector terminal 90)
•
GND circuit (EGR boost sensor connector terminal B and PCM connector terminal 91)
Short circuit
•
EGR boost (Barometric pressure) signal
circuit (EGR boost sensor connector terminal
A and PCM connector terminal 34)
•
Constant voltage circuit (EGR boost sensor
connector terminal C and PCM connector
terminal 90)
5. Reconnect the EGR boost sensor connector.
End Of Sie
FUEL TANK PRESSURE SENSOR INSPECTION [FS]
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Note
•
Perform the following test only when directed.
•
The following vacuum values are indicated by relative pressure from barometric pressure.
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 bolt.
Tightening torque
7.9—10.7 N·m
{80—110 kgf·cm, 69.5—95.4 in·lbf}
Caution
••••
Do not apply vacuum outside of the
specified limits, or the fuel tank pressure
sensor will be damaged.
4. Turn the ignition switch to ON.
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