Operation CHARM: Car repair manuals for everyone.
Home >> Hyundai >> 2009 >> Tucson FWD L4-2.0L >> Repair and Diagnosis >> Heating and Air Conditioning >> Control Assembly >> Testing and Inspection >> Component Tests and General Diagnostics >> Heater & A/C Control Unit(Manual) >> A/C Check
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

A/C Check





Check Point By Type

A/C Check




For A/CON output, blower must be basically operated. When blower speed 1 is selected, blower relay is turned ON and voltage is supplied to point "A".
When the supplied voltage at point "A" is entered into control connector C15 and at this moment when A/CON switch is turned ON, voltage is supplied to connector C5 at 9V or more.
Thermistor value determines whether the input power at point "B" is supplied to point "C".
The state of ON/OFF of triple switch determines whether the input power at point "C" is supplied to point "D".
Finally when the voltage is supplied to point "D", engine ECU determines whether A/CON and CONDENSER FAN turned ON/OFF.
Troubleshooting




pro multis · About Operation CHARM