User Manual

Chapter 9
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
60
III - FAN UNIT (1510)
The ECU controls operation of the fan unit at low speed if the pressure is greater than
10 bars (off if the pressure is less than 7 bars).
The ECU controls operation of the fan unit at high speed if the pressure is greater
than 22 bars (off if the pressure is less than 19 bars).
Note: The BSI controls operation of the fan unit at mid speed if the pressure is
greater than 17 bars (off if the pressure is less than 14 bars).
IV - DOWNGRADED MODE
Role of the injection ECU if the pressurestat develops a fault:
• to control the illumination of the diagnostic LED on the control panel,
• to prevent operation of the air conditioning compressor (AC/OUT).
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