Customer questions

MERCEDES-BENZ E-CLASS (W211) E 320 CDI (211.026) - Air Condition - 9470

Customer question from Apr 15, 2016, 7:45:50 PM
symptoms

  • Nothing obvious

Description

R22/3 (Heater booster) electrical fault, discovered during diagnostics

Answer from May 3, 2016, 9:03:02 PM

Hello Bryanjohnstone, thenks for your Question and sorry for the late answer.
This fault Code means: 9470 R22/3 (heater Booster electric fault).
The heater Booster have 2 Plugs, one Plug have only 2 Pins. At Pin 1 is the Vehicle mass ( Terminal 31) at Pin 2 is Terminal 30, secured wit an 200 A Fuse in the F32 (front fuse box)
The second Plug is for the flap actuators in the Dashboard. All the actuators and the heater Booster have Signals from the Climate Control Unit.
You can check the Signals one pin has Terminal 15 and one Pin Terminal 31, the third ist Controlling pin from Climate Control Unit.
Check this out when all Things are okay and there is no electric fault, or contact fault, i think then is the Heater Booster the Problem.

Greetings
Team autoaid

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