[1] Check component M4/7 (Engine and AC electric suction fan with integrated control).: Short circuit in the signal line

[1] Check component M4/7 (Engine and AC electric suction fan with integrated control).: Short circuit in the signal line

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

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:
- Coolant temperature:Warning! Communication with ECU required.
Proceed to 'Actuation' with F2

1.2. Test PWM signal for operating the suction fan.
Figure legend

- A -Connection Test cable 35-pin socket box
- 001 -Sockets of component N3/9 (CDI control unit)
- 05 -35-pin socket box
- 050 -126-pin socket box
- 108 -Test cable 266 589 01 63 00
- N3/9 (CDI control unit)
- II 1-63ConnectionTest cable
- III 64-126ConnectionTest cable
Test sequence

- Switch off ignition.
- Connect socket box (35-pin) to component N3/9 (CDI control unit).
- Connect socket box (126-pin) to component N3/9 (CDI control unit).
- Switch on ignition.
Warning!

- Connection A of test cable 108 may NOT be connected to connection B of the 126-pin socket box (050).
Continue to test with button F2







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
- There is no fault code present for component B11/4 (Coolant temperature sensor).
- The fuses of component M4/7 (Engine and AC electric suction fan with integrated control) are OK.
Actual values:
- Coolant temperature:Warning! Communication with ECU required.
Continue with button F2