Zexel Air Conditioning Control Unit

We haven't investigated the diagnostic features of the Air Conditioning Control Unit in much detail. The data returned by querying it suggests that it is a much simpler device than the ECU and TCU. There appear to be only 32 addressable locations.

Here are the values returned by querying each address.

The control panel is slightly different on a USDM SVX. See picture below. The buttons are as follows: 01=Recirc, 02=Demist, 03=High, 04=Med, 05=Lo, 06=Econ, 09=Auto, 0A=Off, 0B=Out_Temp, 0C=Vent

The locations in the table below were extracted from the Select Monitor Cartridge.

Address	Parameter
000B	" Tset (F01) "	Temperature Set on Panel	(x*0.5) + 18 deg
000C	" To (F02) "
0001	" Troom (F03) "	Room Temperture	x*0.5 - 50 deg
0002	" Tamb (F04) "	Ambient Temperture	x*0.5 - 50 deg
0003	" Tevp (F05) "	Refrigerant Temperature	x*0.5 - 50 deg
0004	" Qsun (F06) "	Sun Load Factor
0004	" Tsun (F07) "	Sun Load Temperature	x*0.5 - 50 deg
0005	" Tref (F08) "	Coolant Temperature	x*0.5 - 50 deg
0006	" Tw (F09) "	Wind Temperature	x*0.5 - 50 deg
0007	" AMRset (F10) "	AMR Target(Active Magnetic Regenerative)(%)	x*100/255
0008	" AMRpot (F11) "	AMR Actual(Active Magnetic Regenerative)(%)	x*100/255
0009	" MODEset (F12) "	Air Outlet (Target) (%)	x*100/255
000A	" MODEpot (F13) "	Air Outlet (Actual) (%)	x*100/255
000D	" BLW (F14) "	Blower Voltage (V)	x*0.04
000E	" Intak (F15) "	Air Inlet	0:Circulation / 2:Fresh Air
0010	" Isol (F16) "	Solenoid Current (A)	x*0.005
0011	" EGItoA/C(F17) "	A/C Compressor (%)	x*100/255
000F	" Sw (FA0) "		"0", "CIR", "DEF", "FAN", "4", "5", "A/C", "+", "-", "AUTO", "OFF", "OUT TEMP", "MODE"
0012	" DIAG.COD(FB0) "
0015	" ADDRESS DATA "

Thanks for Noriyasu Mori for assistance with collecting this information