Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 40
4.4 Engine ECM Power Supply Circuit Resistance Test
Component
P
erk
ins
part
number
Supplier Part
number
Quantity
J1 Receptacle TBD DRCP24-86PA 1
Pins (positions 81-86
only)
TBD 0460-204-
12141
6
2.2 Ohm Resistor
200W
N/A N/A 1
Relay (low contact
resistance
N/A N/A 1
Pushbutton N/A N/A 1
Voltmeter N/A N/A 2
Table 4.8 ECM Power Supply Circuit Test Components
R1
V1
2.2 Ohms 200 watts
Voltmeter 1
8684 85 81 82 83
J1 Engine ECM Plug
Machine
Harness
-
+
V2
Voltmeter 2
Machine Battery
Note: See appendix 1 for
details of the ECM positive
and negative battery
connections.
Figure 4.6 ECM Power Supply Circuit Resistance Testing
Note: The total ECM supply circuit resistance forms part of the
Application Appraisal. Circuits which do not meet the 50mOhm
requirement for a 12V system and 100mOhms for 24V will be classed as
a failure during the Appraisal sign off.
4.4.1 Test Procedure
Record the measured resistance value of the test resistor used. Disconnect
the J1 engine ECM plug from the ECM and connect the test apparatus as
shown in figure 4.6. Press the button for three seconds and at the same time
record the voltage measured from Voltmeter 1 and Voltmeter 2.
Formula: