Volkswagen Heater: Difference between revisions

Revision as of 05:57, 7 February 2022

VW heater P/N are:

LIN messages for the water heater:

ID28 is sent for control, every 50ms

Byte 0 is power, last bit of byte 1 starts and stops

HV cable P/N is 3Q0971475 or 5Q0971475.

LV connector looks like it is Webasto 1J0973714 8P type.

HV connector HVA 280 KEY_E from TE

LV Connector 1J0973714

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 LIN messages for the water heater:
-ID 33 (0x61)
-* length 8 Byte / ENHANCED Checksum
-* Byte 0 =1 at HV voltage under 200V, =0 above 200V (below 200V it want work, so its a kinde of HV OK)
-* Byte 1 =112, always, i dont know why
-* Byte 2 =RPM as set via PID=32 in Byte 0
-* (Byte 3 =110 below 200V, =14 above 200V, =46 when er running)
-* Byte 3 bit 6= HV not OK
-* Byte 3 bit 5= running
-* Byte 5 =temperature 160 at 24°C, i don't know the scaling and what themperature that is til now
-* Byte 6 =54 at 109V, =28 at 56V =83 at166V scaling: Voltage/2
 ID28 is sent for control, every 50ms