Test 3: Test PWM Signal For Operating the Suction Fan

Test PWM signal for operating the suction fan

Test prerequisite
- The CAN communication with control module N22 (AAC pushbutton control module) or N22/7 (Comfort AAC pushbutton control module) is o.k.
- Actuation is not okay.

Test sequence

- Switch off ignition.
- Connect socket box (35-pin) to component N3/10 (ME-SFI control module).
- Connect socket box (126-pin) to component N3/10 (ME-SFI control module).
- [5.5] 5<-->89 [4.4]
- Operate engine at idling speed.

Status of the relevant actual values:
- Temperature of coolant: Communication with ECU required
- Air conditioning: Communication with ECU required

Specified values
- In the case of :Coolant temperature <85°C, Air conditioning ON: [2.5...12.5] V
- In the case of :Coolant temperature >95°C, Air conditioning OFF: [2.5...12.5] V

Question: Are the measured values okay?