User Manual

Chapter 6
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
42
The atmospheric pressure sensor cannot be removed from the injection ECU.
The ECU has a power stage which is capable of providing the very high control
current required for the injectors to operate.
The ECU is connected to the injection harness by an 88 track connector.
The injection ECU software is upgraded by downloading (ECU with a flash
EPROM).
B - ALLOCATION OF ECU CHANNELS
CHANNEL N° DESCRIPTION
1 +12 V supply (after double relay) (engine relay unit)
2 Injector n°1 control
3 Injector n°3 control
4 Injector n°4 control
5 Injector n°2 control
6 Injector n°2 control
7 -
8 Diagnostic line for the coils of the fan unit control relays
9 Dialogue line: CAN H network
10 -
11 Input: air temperature sensor (flowmeter)
12 Supply: camshaft position sensor / differential pressure
sensor
13 Input: air flow signal (flowmeter)
14 Input: engine speed sensor signal
15 Input: accelerator pedal sensor signal
16 -
17 -
18 Input: camshaft sensor signal
19 -
20 -
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