MACS Service Reports - 2016 - MAY8
sure switch and the second time was the charm. He jumpered across it again, the clutch engaged and the system started running with high/low pressures of 200 psi/35 psi. New
switch was installed and the Liberty was out the door. ■
techauthority.com
techauthority.com
technician replaced it. Waste of time and money. He
should have gone through a diagnostic routine instead,
which would have shown the transducer was not an issue.
What now? Answer: he went back to the A/C low-pres-
Figure 11: This Jeep Liberty HVAC diagram shows the low-pressure
switch, wired to the Powertrain Control Module. But it also does not
complete the picture, although it adds the blower motor to the circuit.
Figure 12: Technician can see the A/C pressure transducer underhood,
and finally we have the wiring diagram that includes it, wired to the body
control module, which reports to the Powertrain Control Module.
MACS Service Reports is published monthly by the Mobile Air Conditioning Society Worldwide. It is distributed to members of MACS Worldwide
and is intended for the educational use of members of the automotive air
conditioning service and repair industry. Suggestions for articles will be
considered for publication, however, MACS Worldwide reserves the right
to choose and edit all submissions.
Editors:
Elvis Hoffpauir, Steve Schaeber
Production Designer:
Laina Casey
Manager of Service Training:
Steve Schaeber
Mobile Air Conditioning Society Worldwide
P.O. Box 88, Lansdale, PA 19446
Phone: (215) 631-7020 * Fax: (215) 631-7017
Email: membership@macsw.org * Website: www.macsw.org
Unless otherwise noted, all photos/art by author.
May 2016
8
MACS Service Reports
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Table of Contents for the Digital Edition of MACS Service Reports - 2016
MACS Service Reports - 2016 - JAN1
MACS Service Reports - 2016 - JAN2
MACS Service Reports - 2016 - JAN3
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MACS Service Reports - 2016 - JAN5
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MACS Service Reports - 2016 - JAN7
MACS Service Reports - 2016 - JAN8
MACS Service Reports - 2016 - FEB1
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MACS Service Reports - 2016 - FEB8
MACS Service Reports - 2016 - MAR1
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MACS Service Reports - 2016 - MAR7
MACS Service Reports - 2016 - MAR8
MACS Service Reports - 2016 - APR1
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MACS Service Reports - 2016 - APR8
MACS Service Reports - 2016 - MAY1
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MACS Service Reports - 2016 - MAY5
MACS Service Reports - 2016 - MAY6
MACS Service Reports - 2016 - MAY7
MACS Service Reports - 2016 - MAY8
MACS Service Reports - 2016 - JUN1
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MACS Service Reports - 2016 - JUN8
MACS Service Reports - 2016 - JUL1
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MACS Service Reports - 2016 - JUL3
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MACS Service Reports - 2016 - JUL5
MACS Service Reports - 2016 - JUL6
MACS Service Reports - 2016 - JUL7
MACS Service Reports - 2016 - JUL8
MACS Service Reports - 2016 - AUG1
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MACS Service Reports - 2016 - AUG3
MACS Service Reports - 2016 - AUG4
MACS Service Reports - 2016 - AUG5
MACS Service Reports - 2016 - AUG6
MACS Service Reports - 2016 - AUG7
MACS Service Reports - 2016 - AUG8
MACS Service Reports - 2016 - SEP1
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MACS Service Reports - 2016 - SEP8
MACS Service Reports - 2016 - OCT1
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MACS Service Reports - 2016 - OCT7
MACS Service Reports - 2016 - OCT8
MACS Service Reports - 2016 - NOV1
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MACS Service Reports - 2016 - NOV5
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MACS Service Reports - 2016 - NOV7
MACS Service Reports - 2016 - NOV8
MACS Service Reports - 2016 - DEC1
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MACS Service Reports - 2016 - DEC3
MACS Service Reports - 2016 - DEC4
MACS Service Reports - 2016 - DEC5
MACS Service Reports - 2016 - DEC6
MACS Service Reports - 2016 - DEC7
MACS Service Reports - 2016 - DEC8
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