Troubleshooting
Teledyne Continental Motors, Inc.
TM
8-13.
Cabin Harness Functional Check
The cabin harness functional check consists of the procedures listed below and presented
in detail in subsequent subsections. Perform all of the checks and correct discrepancies
prior to engine installation.
•
Electrical Ground Check
•
Enable Switch Check
•
Power Supply Check
•
Boost Pump Relay Check
8-13.1. Electrical Ground Check
Procedure
1.
Master Power Switch ................................... OFF
2.
FADEC Primary Power Switch ................... OFF
3.
FADEC Secondary Power Switch ............... OFF
4.
Ignition Switch............................................. OFF
5.
Use a Digital Volt-ohm Meter (DVM) to measure between aircraft ground and the
pins designated in the connector J5 (Figure 8-2) and J6 (Figure 8-3) pin layout tables.
Table 8-2.
Connector Resistance Readings
Plug Pin
Label
Resistance
P5 or P6
B
Ground
< 0.5
P5 or P6
D
Ground
< 0.5
P5 or P6
J
Enable A
< 0.5
P5 or P6
K
Enable B
< 0.5
P5 or P6
S
Ground
< 0.5
P5 or P6
V
Ground
< 0.5
Figure 8-2.
Pin Connector Layout for J5
A
Primary Power (Power A)
H
Fault 2
R
Primary Power (Power A)
B Ground
J Enable
1
S Ground
C
Secondary Power (Power B) K
Enable 2
T
*NC
D
Ground
L
Throttle Position (WOT)
U
Primary Power (Power A)
E RS485A
M *NC
V Ground
F RS485B
N Boost
Request
G Fault
1
P *NC
*NC – Not Connected
8-30
IOF-240 Series Engine Maintenance Manual
Change 1
31 August 2007
