Mazda MX-6 1998, Руководство по ремонту

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MECHANICAL [KL]
ldle-up Speed Inspection
1. Perform “Engine Tune-up Preparation”.
2. Verify that the idle speed is normal.
3. Verify that the idle-up speed is within the
specification.
*1 : Excludes temporary idle speed drop just after the
electrical loads (E/L) are turned on.
*2 : Headlight is on, Fan switch (3rd or higher), Cooling fan
are operating.
*3 : A/C switch and fan switch are on.
*4 : Steering wheel is fully turned.
4. If not as specified with all loads conditions, check
the idle air control valve.
5. If not as specified with some load conditions,
check related input switches, harnesses and
connectors.
Idle Mixture Inspection
1. Perform “Engine Tune-up Preparation”.
2. Verify that the idle speed and ignition timing are
within the specification.
3. Insert an exhaust gas analyzer to the tailpipe.
4. Verify that the CO and HC concentrations are
within the regulation.
5. if not, inspect the following.
• On-board diagnostic system
• Heated oxygen sensor (Front, Middle, Rear)
• Intake manifold vacuum
• Fuel line pressure
• Ignition timing control
6. If the systems are normal, replace the three way
catalytic converter.
Load
c o n d itio n
Idle-up speed (rpm)*1
MTX
ATX
N, P position
D range
E/L ON*2 550— 750 550— 750 525— 725
A/C ON*3 725— 925
725— 925 700— 900
P/S ON*4
550— 750 550— 750 525— 725
0 1 -1 OB-21