Mazda Protege 5. Manual — part 157
EMISSION SYSTEM
01–16–18
POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM FLOW DIAGRAM
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POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION
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1. Remove the PCV valve.
2. Blow through the valve and verify that air flows as
specified.
•
If not as specified, replace the PCV valve.
Specification
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Condition
Airflow
Air applied from port A
Yes
Air applied from port B
No
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EMISSION SYSTEM
01–16–19
01–16
WARM UP THREE-WAY CATALYTIC CONVERTER (WU-TWC) INSPECTION
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Note
•
Make sure that no HO2S DTC has been detected. If detected, this inspection cannot be used for WU-
TWC inspection.
1. Connect the WDS or equivalent and monitor PIDs as following.
•
Monitor the WU-TWC using O2S11 PID for upstream HO2S and O2S12 PID for downstream HO2S.
2. Begin to monitor the appropriate PIDs.
3. Drive the vehicle for 10 min at 65—96 km/h {40—60 mph} to ensure the WU-TWC reaches operating
temperature.
4. Stop the vehicle and leave in a safe place.
5. Let the engine at idle.
6. Record PIDs for 1 min.
7. Select the appropriate PIDs and read the graph.
8. Count the number of times (inversions) that the upstream HO2S graph line actually crosses the 0.5 V line.
9. Count the number of times (inversions) that the downstream HO2S graph line actually crosses the 0.5 V line.
Note
•
Do not count the number of peaks. Refer to the illustration.
10. Using the following equation, calculate the value of ratio.
Equation
RATIO = Upstream HO2S inversion
÷÷÷÷
downstream HO2S inversion
•
If the ratio is 2 or more or no downstream HO2S inversion, the WU-TWC is functioning properly.
•
If the ratio is less than 2, the WU-TWC is not functioning properly. Replace the WU-TWC.
Upstream HO2S graphline example
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EMISSION SYSTEM
01–16–20
Downstream HO2S graphline example 1
Equation
RATIO = 26 inversions (upstream HO2S
inversions)
÷÷÷÷
7 inversions (downstream
HO2S inversions) = 3.7 (good WU-TWC)
Downstream HO2S graphline example 2
Downstream HO2S graphline example 3
Equation
RATIO = 26 inversions (upper stream HO2S
inversions)
÷÷÷÷
19 inversions (downstream
HO2S inversions) = 1.4 (deteriorated WU-
TWC)
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CHARGING SYSTEM
01–17–1
01–17
01–17
CHARGING SYSTEM
BATTERY REMOVAL/INSTALLATION . 01–17–1
BATTERY INSPECTION . . . . . . . . . . . . . 01–17–1
Battery . . . . . . . . . . . . . . . . . . . . . . . . . 01–17–1
Back-up Current . . . . . . . . . . . . . . . . . . 01–17–2
BATTERY RECHARGING. . . . . . . . . . . . 01–17–2
GENERATOR
REMOVAL/INSTALLATION . . . . . . . . . . 01–17–3
Drive Belt Installation Note . . . . . . . . . . 01–17–3
GENERATOR INSPECTION . . . . . . . . . . 01–17–3
Generator Warning Light. . . . . . . . . . . . 01–17–3
Generator . . . . . . . . . . . . . . . . . . . . . . . 01–17–4
Current . . . . . . . . . . . . . . . . . . . . . . . . . 01–17–4
End of Toc
BATTERY REMOVAL/INSTALLATION
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1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.
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BATTERY INSPECTION
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Battery
•
Inspect the battery in the following procedure.
1
Negative battery cable
2
Positive battery cable
3
Battery clamp
4
Battery box
5
Battery
6
Battery tray
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Step
Inspection
Action
1
Measure open circuit
voltage of battery.
Above
12.4 V
Go to step
3.
Below
12.4 V
Go to next
step.
2
Quick charge for 30
minutes and recheck
voltage.
Above
12.4 V
Go to next
step.
Below
12.4 V
Replace
battery.
3
Apply load test (see load
test chart) to battery using a
battery load tester and
record battery voltage after
15 seconds. Is voltage
more than specification?
Yes
Battery is
okay.
No
Replace
battery.
1712-1U-01G(01-17).fm 1 ページ 2001年6月29日 金曜日 午前9時47分
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