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Home >> Mazda >> 1992 >> MX-6 L4-2184cc 2.2L SOHC F2 >> Repair and Diagnosis >> Heating and Air Conditioning >> Control Assembly >> Testing and Inspection >> Logic Control Type
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Logic Control Type

INSPECTION






Checking REC-FRESH Air Selector Circuit








1. Connect a jumper wire between M terminal and L terminal. Connect a resistance (at least 1 kOhm) between B terminal and O terminal, and check the voltage between these terminals using a voltmeter.








2. Connect a resistance (at least 1 kOhm between d terminal and B terminal, and check the voltage between B terminal and 0 terminal using a voltmeter.





3. Check for continuity between N terminal and L terminal with the REC-FRESH selector switch in FRESH position (out) using an ohmmeter.





4. Check for continuity between P terminal and L terminal with the REC-FRESH air selector switch in REC position (in) using ohmmeter.


Checking Mode Control Circuit








1. Connect a jumper wire between I terminal and L terminal. Connect a resistance (at least 1 kOhm) between D terminal and L terminal, and check the voltage between these terminals using a voltmeter.








2. Connect a jumper wire between C terminal and L terminal. Connect a resistance (at least 1 kOhm) between A terminal and L terminal, and check the voltage between these terminals using a voltmeter.








3. Connect a resistance (at least 1 kOhm) between d terminal and D terminal, and check the voltage between D terminal and L terminal using a voltmeter.








4. Connect a resistance (at least 1 kOhm) between d terminal and A terminal, and check the voltage between A terminal and L terminal using a voltmeter.








5. Check for continuity between terminals in following positions with an ohmmeter.


Checking Air Mix Control Circuit








1. Connect a resistance (at least 1 kOhm) between Q terminal and T terminal.
Set temperature control lever to center position between MAX-HOT and MAX-COLD.
Connect a jumper wire between V terminal and U terminal and check the voltage between terminals as shown.








2. Connect a resistance (at least 1 kOhm) between Q terminal and T terminal.
Set temperature control lever to center position between MAX-HOT and MAX-COLD.
Connect a jumper wire between V terminal and S terminal and check the voltage between terminals as shown.





3. Connect a resistance (at least 1 kOhm) between Q terminal and T terminal.
Set temperature control lever to MAX-HOT, and check that Q terminal voltage is higher than T terminal voltage.





4. Connect a resistance (at least 1 kOhm) between Q terminal and T terminal.
Set temperature control lever to MAX-COLD, and check that T terminal voltage is higher than Q terminal voltage.


Checking A/C Switch And ECO Switch Circuit








1. Turn the A/C switch off.
Connect a jumper wire between terminal c and terminal L. Connect a resistance (at least 1 kOhm) between each terminals, and check the voltage between these terminals.








2. Turn the A/C switch on.
Connect a resistance (at least 1 kOhm) between each terminal, and check the voltage between these terminals.








3. Turn the A/C switch on and the ECO switch off.
Connect a jumper wire between terminal c and L terminal.
Connect a resistance (at least 1 kOhm) between each terminals, and check the voltage between these terminals.








4. Turn the A/C switch and the ECO switch on.
Connect a jumper wire between terminal c and L terminal.
Connect a resistance (at least 1 kOhm) between each terminal, and check the voltage between these terminals.


Checking Fan Speed Control Lever








Check for continuity between each terminal of 6 pin connector.


Checking Dim Indicator Circuits
(Indicator circuit)





1. Connect a jumper wire between terminal c and terminal L.
Check for illumination at A/C switch indicator with A/C switch on.
Check for illumination at ECO switch indicator with ECO switch on.





2. Check that the mode control switch and REC-FRESH select switch indicators illuminate when the respective switches are ON.





3. Apply 12V to terminal a, and check that the indicators are dim.


Checking Illumination Circuit





1. Connect a jumper wire between terminal b and terminal L.
2. Apply 12V to terminal a, and check that the indicators are dim.

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