Can Data Link Circuit - Test - Perkins M190C Troubleshooting Manual

122
Troubleshooting Section
Expected Result:
The voltage is 5.0 ± 0.16 VDC.
Results:
•
OK – The +5 V supply is within the expected
range. Proceed 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 eliminates the fault.
STOP.
Test Step 7. Perform the "Wiggle Test"
on the Electronic Service Tool
A. Select the "Wiggle Test" from the diagnostic tests
on the electronic service tool.
B. Choose the appropriate group of parameters to
monitor.
C. Press the "Start" button. Wiggle the wiring harness
in order to reproduce intermittent faults.
If an intermittent fault exists, the status will be
highlighted and an audible beep will be heard.
Expected Result:
No intermittent faults were indicated during the
"Wiggle Test".
Results:
• OK – No intermittent faults were found. The
harness and connectors appear to be OK. If you
were sent from another procedure, return to the
procedure and continue testing. If this test has
resolved the fault, return the engine to service.
STOP.
•
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 eliminates the fault.
STOP.

CAN Data Link Circuit - Test

System Operation Description:
The CAN data link is used to communicate
information 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 short 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.
KENR9126
i04010970