Perkins M216C - CAN Data Link Circuit - Test

122 KENR9126
Troubleshooting Section
Expected Result:
The voltage is 5.0 ± 0.16 VDC.
Results:
•
OK – The +5 V supply is within the expected
range. Proce
ed to Test Step 7.
•
Not OK – The voltage is greater than 5.16 VDC.
Repair: Check the +5 V supply wire for a short to a
higher voltage source.
Repair the +5 V supply wire and/or replace the +5
V supply wire.
Verify that the repair eliminates the fault.
STOP.
•
Not OK – The voltage is less than 4.84 VDC.
Repair: Check the +5 V supply wire for a short to
ground.
Repair the +5 V supply wire and/or replace the +5
V supply wire.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair e
liminates the fault.
STOP.
Test Step 7. Perform the “Wiggle Test”
on the Electronic Service Tool
A. Selec
t the “Wiggle Test” from the diagnostic tests
on the e lectronic service tool.
B. Choo
se the appropriate group of parameters to
monitor.
C. Pres
s the “Start” button. Wiggle the wiring harness
in order to reproduce intermittent faults.
If a
n intermittent fault exists, the status will be
highlighted and an audible beep will be heard.
Exp
ected Result:
No intermittent faults were indicated during the
“W
iggle Test”.
Results:
•
OK – No intermittent faults were found. The
harness and connectors appear to be OK. If you
w
ere sent from another procedure, return to the
procedure and continue testing. If this test has
resolved the fault, return the engine to service.
S
TOP.
•
Not OK – At least one intermittent fault was
indicated.
Repair: Repair the harness or the connector.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair elimi
nates the fault.
STOP.
i04010970
CAN Data Link Circuit - Test
System Ope
ration Description:
The CAN data link is used to communicate
informati
on between the Electronic Control Module
(ECM) and other modules. Use this procedure to
troubleshoot any suspect problems with the CAN
data link
.
This procedure identifies the following problems:
•
Faulty connectors
•
Missing
termination resistors
•
Short circuits
•
Open circuits
•
Faulty
marine power display
A problem with the CAN data link is probably caused
by a sh
ort circuit to ground or a short circuit to
another voltage source in the harness. The next likely
cause is a problem with a module that is connected
to the
data link. The least likely cause is a problem
with the ECM.