Volkswagen Heater

VW heater P/N are:

• 3Q0963231A
• 3Q0963231C
• 3Q0963231E

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

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

• +HV near to the body,

• -HV far from the body

LV Connector 1J0973714

• Pin 1 is permanent 12V
• Pin 2 is GND
• Pin 4 is LIN