Mazda 6 2002, Workshop Manual

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F–220
TROUBLESHOOTING
NO.22 VIBRATION CONCERNS (ENGINE)
A6E398018881W24
Diagnostic procedure
End Of Sie
NO.23 A/C DOES NOT WORK SUFFICIENTLY
A6E398018881W25
Diagnostic procedure
22 VIBRATION CONCERNS (ENGINE)
DESCRIPTION
•
Vibration from under hood or driveline
POSSIBLE CAUSE
•
Loose attaching bolts or worn parts
•
Components malfunction such as worn parts
STEP INSPECTION RESULTS ACTION
1 Inspect following components for loose attaching
bolts or worn parts:
•
Cooling fan
•
Condenser fan
•
Drive belt and pulleys
•
Engine mounts
All items okay?
Yes Inspect following systems:
•
Wheels
•
ATX
•
Driveline
•
Suspension
No Readjust or retighten engine mount installation
position.
Service if necessary for other parts.
2 Verify test results.
•
If okay, return to diagnostic index to service any additional symptoms.
•
If malfunction remains, replace PCM.
23 A/C DOES NOT WORK SUFFICIENTLY.
DESCRIPTION A/C compressor magnetic clutch does not engage when A/C switch is turned on.
POSSIBLE CAUSE
•
Improper refrigerant charging amount
•
Open A/C magnetic clutch
•
Open circuit between A/C relay and A/C magnetic clutch
•
Poor GND of A/C magnetic clutch
•
Refrigerant pressure switch is stuck open.
•
A/C relay is stuck open.
•
Seized A/C compressor
•
Open circuit between A/C switch and PCM through both refrigerant pressure switch and A/C amplifier
STEP INSPECTION RESULTS ACTION
1 Connect WDS or equivalent to DLC-2.
Retrieve any continuous memory, KOEO and
KOER DTCs.
Are there any DTCs displayed? Yes DTC is displayed:
Go to appropriate DTC test.
No No DTC is displayed:
Go to next step.
2 Disconnect A/C compressor connector.
Start engine and turn A/C switch on.
Is there correct voltage at terminal of A/C
compressor magnetic clutch connector?
Specification
More than 10.5 V
Yes Inspect for GND condition of magnetic clutch on A/C
compressor.
If GND condition is okay, inspect for open circuit
magnetic clutch coil.
No Go to next step.
3 Disconnect refrigerant pressure switch
connector.
Connect jumper wire between terminals of A/C
high pressure switch connector.
Connect jumper wires between terminals of
refrigerant pressure switch connector.
Connect WDS or equivalent to DLC-2.
Access ACSW PID.
Turn ignition switch to ON position.
Turn A/C switch on and set blower fan at any
speed.
Does ACSW PID read ON? Yes Inspect refrigerant pressure switch operation.
If switch is okay, go to next step.
No Inspect for following:
•
A/C switch is stuck open.
•
Open circuit between refrigerant pressure switch
and PCM terminal 1AC
•
Open circuit of blower motor fan switch and resistor
(if blower motor does not operate)
•
Evaporator temperature sensor and A/C amplifier
4 Remove jumper wire from switch connector.
Reconnect connector to refrigerant pressure
switch.
Start engine and turn A/C switch on.
Does fan operate? Yes Inspect for stuck open A/C relay.
Replace if necessary.
No Inspect following and repair or replace as necessary:
•
Refrigerant charging amount
•
A/C compressor for being seized
5 Verify test results.
•
If okay, return to diagnostic index to service any additional symptoms.
•
If malfunction remains, replace PCM.