Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 123
10.0 Starting and Stopping the Engine
10.1 Starting the Engine
Unlike mechanically controlled fuel systems no customer connection to the
fuel pump solenoid is necessary. To activate the engine ECM un-switched
battery voltage needs to be constantly supplied to pins 84, 85, 86 (Batt +) and
81, 82, 83 (Batt -), as well as constant switched battery voltage applied to pin
69. When the ECM is active the engine crankshaft needs to be rotated above
a minimum cranking speed, a typical cranking speed is 180rpm (this will differ
dependent on the application). Once the ECM has determined engine
cranking speed and engine position, fuel pressure and delivery will be
controlled.
The most popular way to control engine starting is by a specifically designed 3
position key switch. The key switch controls battery voltage to the keyswitch
input and the starter motor circuit. Some application may require a 4-position
switch to run auxiliary equipment when the engine is not running or to disable
the delayed engine shutdown feature in some situations (details of the
requirements for delayed engine shutdown and its operation can be found in
section 16.3).
OFF
ON
START
IGNITION KEY
SWITCH
START
4
3
1
2
POSITION
POSITION 1 - OFF
POSITION 2 - RUN
POSITION 3 - START
TERMINALS
2 & 4
1 & 4
1, 3 & 4
Figure 10.1 typical Ignition Key Switch Contact Configuration
Automatic Starting – Some applications need to be started automatically.
There is no automatic start feature available on this product. If an automatic
start sequence is required the following points must be considered:
• Start Aid - Wait to Start Control
• Starter Cranking Duration
• Starter Abutment Detection
• Number of Start Attempts
• Starter Disengagement Speed
• Warm Up Period
• Cool Down Period
The ECM software considers the engine running when the engine speed is
100rpm below the desired engine speed or has reached 1400rpm, at this point
after a predetermined period of time the engine will switch from cranking fuel
maps to running fuel maps. It is important to note that starter motors must be
disengaged earlier to prevent the starter motor being driven by the engine.
The engine is considered stalled when the engine has dropped below
300rpm. For more information regarding the correct specification and