Troubleshooting

(Table 63, contd)
Troubleshooting Test Steps
Values Results
3. Check the Data Link Wiring
A. Disconnect each of the connectors that connect other devices
on the data link.
B. Use a multimeter to measure the resistance between P1:46
and each of the CAN+ pins for other devices on the CAN data link.
C. Use a multimeter to measure the resistance between P1:46
and pin F on the diagnostic connector.
D. Use a multimeter to measure the resistance between P1:47
and each of the CAN- pins for other devices on the CAN data link.
E. Use a multimeter in order to measure the resistance between
P1:47 and pin G on the diagnostic connector.
Less than 5
Ohms
Result: At least one of the resistance measurements is
greater than 5 Ohms - there is an open circuit or high resist-
ance in the wiring.
Repair the connectors or the harness and/or replace the
connectors or the harness.
Ensure that all seals are correctly in place and ensure that
the connectors are correctly connected.
Use the electronic service tool in order to clear all logged di-
agnostic codes and then verify that the repair has eliminated
the fault.
Result: All measured resistances are less than 2 Ohms.
Proceed to Test Step 4
4. Check the Other Devices on the CAN Data Link
A. Use the appropriate service tools in order to diagnose other de-
vices on the data link.
Other devi-
ces are OK
Result: At least one of the other devices is not operating
correctly.
Use the appropriate service tools in order to repair other de-
vices on the data link.
Use the electronic service tool in order to clear all logged di-
agnostic codes and then verify that the repair eliminates the
fault.
Result: The other devices are operating correctly.
Contact the Dealer Solution Network (DSN).
i06580077
ECM Memory - Test
This procedure covers the following diagnostic
codes:
Table 64
Diagnostic Trouble Code for the ECM Memory
J1939 Code
Description
Notes
152-2 Number Of ECU Resets : Erratic, Intermittent, or Incorrect The software in the Electronic Control Module (ECM) has
reset when the engine was running.
There may be a brief loss of electrical power.
The indicator lamps may come on for 2 seconds (lamp
test).
166-2 Engine Rated Power : Erratic, Intermittent, or Incorrect The ECM has detected an error during a software
upgrade.
If equipped, the warning lamp will come on.
(continued)
UENR0612-07 127
Circuit Tests
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