__________________________________________________ | ___________________________________________________ | ||||||
Company-owned sales and service outlet/agency dealer number | Customer | ||||||
__________________________ | ________________________ | ||||||
Vehicle identification number | Repair order number | ||||||
_________________________ | ________________________ | ||||||
CodeM74 (Clean-Fix radiator quick cleaning system). | Inspector | Date | |||||
________________________ | __________ | _________ | __________________________ | ________________________ | |||
Vehicle registration number | First registration | Model | Engine number | Operating hours/km/miles | |||
Before starting the measurements, warm up the vehicle until the coolant temperature is approx. 60 °C.
The lower the pulse width modulated signal (PWM signal) at the engine radiator solenoid valve (Y355) or on the charge air cooler solenoid valve (Y356), the higher the fan speed.
Before and after the "Charge air cooler fan speed measurement", the "Specified value on the engine radiator solenoid valve (Y355)" has to be preset to 100 %, to ensure that the engine radiator fan does not turn.
Otherwise the measurement result may be faulty.
Measurement of fan speed for charge air cooler |
Specified value on charge air cooler solenoid valve (Y356) | Measurement with engine at idle speed | Measurement with engine at idle speed | Measurement with engine at 1000 rpm | Measurement with engine at 1000 rpm |
Input value (PWM signal) | Fan speed | Fan speed | Fan speed | Fan speed |
0 % | > 1200 rpm | ___________rpm | > 1200 rpm | ___________rpm |
Uncontrolled (electrical connector at charge air cooler solenoid valve (Y356) unplugged) | As for PWM signal 0 % | ___________rpm | As for PWM signal 0 % | ___________rpm |
Measurement of fan speed for charge air cooler |
Specified value on charge air cooler solenoid valve (Y356) | Measurement with engine at 1400 rpm | Measurement with engine at 1400 rpm | Measurement with engine at 1800 rpm | Measurement with engine at 1800 rpm |
Input value (PWM signal) | Fan speed | Fan speed | Fan speed | Fan speed |
60 % | | | 0 rpm | ___________rpm |
50 % | | | > 150 rpm | ___________rpm |
40 % | | | > 600 rpm | ___________rpm |
30 % | | | > 1000 rpm | ___________rpm |
20 % | | | > 1200 rpm | ___________rpm |
10 % | | | > 1200 rpm | ___________rpm |
0 % | > 1200 rpm | ___________rpm | > 1200 rpm | ___________rpm |
Uncontrolled (electrical connector at charge air cooler solenoid valve (Y356) unplugged) | As for PWM signal 0 % | ___________rpm | As for PWM signal 0 % | ___________rpm |
Before and after the "Radiator fan speed measurement", the "Specified value on the charge air cooler solenoid valve (Y356)" has to be preset to 100 % to ensure that the charge air cooler fan does not turn.
Otherwise the measurement result may be faulty.
Engine radiator fan speed measurement |
Specified value on engine radiator solenoid valve (Y355) | Measurement with engine at idle speed | Measurement with engine at idle speed | Measurement with engine at 1000 rpm | Measurement with engine at 1000 rpm |
Input value (PWM signal) | Fan speed | Fan speed | Fan speed | Fan speed |
0 % | > 1000 rpm | ___________rpm | > 1500 rpm | ___________rpm |
Uncontrolled (electrical connector at radiator solenoid valve (Y355) unplugged) | As for PWM signal 0 % | ___________rpm | As for PWM signal 0 % | ___________rpm |
Engine radiator fan speed measurement |
Specified value on engine radiator solenoid valve (Y355) | Measurement with engine at 1400 rpm | Measurement with engine at 1400 rpm | Measurement with engine at 1800 rpm | Measurement with engine at 1800 rpm |
Input value (PWM signal) | Fan speed | Fan speed | Fan speed | Fan speed |
60 % | | | 0 rpm | ___________rpm |
50 % | | | > 120 rpm | ___________rpm |
40 % | | | > 600 rpm | ___________rpm |
30 % | | | > 1200 rpm | ___________rpm |
20 % | | | > 1600 rpm | ___________rpm |
10 % | | | > 1700 rpm | ___________rpm |
0 % | > 1700 rpm | ___________rpm | > 1700 rpm | ___________rpm |
Uncontrolled (electrical connector at radiator solenoid valve (Y355) unplugged) | As for PWM signal 0 % | ___________rpm | As for PWM signal 0 % | ___________rpm |