25 A/C Is Not Cut Off Under Wide Open Throttle Conditions [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
remains On, short to GND may be
present.
Does AC_REQ PID remain On?
Reconnect refrigerant pressure switch connector.
Read AC_REQ PID while turning off A/C switch.
Note
4
• AC_REQ PID should read Off when
turning A/C switch off. If AC_REQ PID
remains On, short to GND may be
present.
Does AC_REQ PID remain On?
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
(See ENGINE SYMPTOM TROUBLESHOOTING
• If malfunction remains, inspect related Service information perform repair or diagnosis.
5
- If vehicle repaired, troubleshooting completed.
- If vehicle not repaired or additional diagnostic information not available, replace the
PCM.
(See PCM REMOVAL/INSTALLATION
NO.25 A/C IS NOT CUT OFF UNDER WIDE OPEN
THROTTLE CONDITIONS [LF]
25
A/C compressor magnetic clutch does not disengage under WOT.
DESCRIPTION
• TP sensor malfunction
• TP sensor misadjustment
POSSIBLE CAUSE
• Loosely installed TP sensor
Diagnostic procedure
STEP INSPECTION
1
Downloaded from
A/C IS NOT CUT OFF UNDER WOT CONDITIONS.
RESULTS
Yes
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Inspect the following:
• Short to GND in wiring harness
between the A/C switch and A/C
Yes amplifier
• Short to GND in wiring harness
between the A/C amplifier and
refrigerant pressure switch
Inspect for stuck closed A/C
No
switch.
[LF].)
[LF].)
ACTION
Go to the next step.
- automotive repair manuals website
B3E010318881W27