Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 46
4.8 Powering The Engine ECM Via Auxiliary Power Supplies
If the engine is to be supplied with electrical power via any other means than a
standard machine battery arrangement, care must be taken when choosing
the power supply. Engine ECM’s powered by devices such as switch mode
power supplies can be particularly troublesome due to the intermittent high
current load demands of the engine ECM during engine operation. To ensure
that the power supply operates correctly, management of these intermittent
high current spikes is employed.
4.9 Sensor Common Connections
Certain components that interface directly with the ECM require connection to
one of the dedicated sensor/switch return pins on the ECM customer machine
interface connector J1. Separate sensor/switch returns are provided for
analogue and digital signals. All components requiring connection to one of
the ECM ground connections must be connected to the correct ground path to
ensure the correct operation of the component.
4.9.1 Actuator Driver Return
All of the following features must be connected back to the engine ECM J1
Actuator Driver return pins 15 & 49.
ECM Feature
J1 Pin
Location
Ether Start Solenoid 9
Glow Plug Relay 8
Engine Fuel Lift Pump
relay
7
Table 4.9 Engine Actuator Connections
4.9.2 Analogue Sensor Return
All of the following Features and switches must be connected back to the
engine ECM J1 Analogue return pins 29, 30.
ECM Feature
J1 Pin
Location
Air Inlet Temperature 34
Analogue Throttle 1 79
Analogue Throttle 2 80
Auxiliary Temperature
Sensor
33
ATAAC Temperature
Sensor
35
Auxiliary Pressure Sensor 61
Fan Speed Signal 11
Table 4.10 Analogue Sensor Connections