Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING [ENGINE CONTROL FS]
STEP
INSPECTION ACTION
13 Note
• The following test is for engine stalling with
A/C on concern. If other symptom exists,
go to next step.
Yes Go to next step.
Connect a pressure gauge to A/C low and
high pressure side lines.
Turn A/C on and measure low side and high
side pressure.
Are pressure within specifications?
D- 0 7 -1 0 REFRIGERANT PRESSURE
CHECK
No Check follows:
• Refrigerant charging amount.
• A/C pressure switches.
• Additional fan operation.
• A/C relay.
14 Note
• The following test is performed for
symptom with cruise control ON.
Yes Go to next step.
If other symptoms exist, go to next step.
Check cruise control system.
Is cruise control system okay?
No Repair or replace.
15 Disconnect vacuum hose between purge
solenoid valve and intake manifold from
solenoid valve side.
Plug opening end of vacuum hose.
Drive vehicle.
Does engine condition improve?
Yes Check if purge solenoid valve sticks open mechanically.
Check evaporative emission control system.
No Go to next step.
16 Visually inspect camshaft position (CMP)
sensor and tooth of camshaft.
Is CMP sensor and tooth of camshaft okay?
Yes Go to next step.
No
Replace malfunctioning part.
17 Is engine compression correct?
c r 0 1 -1 0 A COMPRESSION INSPECTION
[FS]
Yes Check following:
• Valve timing.
• Internal transaxle component (ATX only).
• Clutch (MTX only).
No Check for cause.
18
Verify test results. If okay, return to diagnostic index to service any additional symptoms.
0 1 -0 1 A -1 45