P20D0

The air conditioning requests an implausible fan output.

Test 1: Check component M4/7 (Engine and AC electric suction fan with integrated control).

Test 2: Check component N22 (AAC [KLA] control and operating unit).

1. Check component M4/7 (Engine and AC electric suction fan with integrated control).

Test 1.1: Check component M4/7 (Engine and AC electric suction fan with integrated control) by means of actuation.

Test 1.2: Test PWM signal for operating the suction fan.

1.1. Check component M4/7 (Engine and AC electric suction fan with integrated control) by means of actuation.
Test prerequisite

- Coolant temperature< 80° C
- Charger connected(The battery voltage must be higher than 12.5 V.)
- Ignition ON
- Engine not running
- Vehicle stationary
- The fuses of component M4/7 (Engine and AC electric suction fan with integrated control) are OK.
Actual values:
- Temperature of coolant:Warning! Communication with ECU required.
Proceed to 'Actuation' with F2

1.2. Test PWM signal for operating the suction fan.
Warning!Communication with ECU required.


2. Check component N22 (AAC [KLA] control and operating unit).
Possible cause and remedy

- Read out fault memory of control unit AAC.
End of test