Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2006-07 Body AC(diag) HVAC Sys(diag)

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     HVAC SYSTEM
(AUTO A/C) (DIAGNOSTICS)
                                     Basic Diagnostic Procedure
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)

1. Basic Diagnostic Procedure
A: PROCEDURE
                      Step                                    Check                        Yes               No
1      START INSPECTIONS.                          Does the self-diagnosis oper-    Go to step 2.                                                                                          TEMS DO NOT
       2) Perform the self-diagnosis.                                                                              System Malfunc-
                                                                                                    tion.>
2      CONFIRM MALFUNCTION PART.                      Can the malfunction part beRepair the mal-    Go to step 3.
       Confirm the malfunction part with self-diagno- confirmed?                 function part
       sis.                                                                      according to each
                                                                                 diagnostics chart.
3      CHECK COMPARTMENT TEMPERATURE. Is the compartment tempera- Go to step 4.                     
4      CHECK A/C SYSTEM RESPONSE.                    Does the A/C system respond A/C system is OK. 




                                                   AC(diag)-2
                                         General Description
                                                                HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)

2. General Description                                  5) Firmly hold a thin paper (b) in front of the in-ve-
                                                        hicle sensor suction port (a) for the auto A/C control
A: CAUTION                                              module and check that the paper moves towards
1) Never connect the battery in reverse polarity.       the port indicating that air is being sucked into the
The Auto A/C control module will be destroyed in-       port.
stantly.                                                NOTE:
2) Do not disconnect the battery cables while the       Ensure the paper does not get sucked into the port.
engine is running.
A large counter electromotive force will be generat-
ed in the alternator, and this voltage may damage
electronic parts such as auto A/C control module.
3) Before disconnecting the connectors of each
sensor and the auto A/C control module, be sure to
turn off the ignition switch.
                                                                             (b)
The auto A/C control module may be damaged.                                                   (a)
4) Every A/C-related part is a precision part. Do not
drop them.
5) Airbag system wiring harness is routed near the                                                  AC-01124
A/C control panel (auto A/C control module) and
junction box.                                           6) If the paper does not move at all, remove the
                                                        auto A/C control module  and check for

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