TM 5-3805-298-23-1
0055
Table 1. 247 SAE J1939 Data Link Diagnostic Codes.
0055
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
247-9 SAE J1939 Data Link
Abnormal Update Rate
Always inspect wiring harness connectors that are involved in the circuit.
Poor connections can often be the cause of a problem in an electrical
circuit. Verify that all connections in the circuit are clean and secure and
that all connections are in good condition. If a problem with the
connection is found, correct the problem and verify that this malfunction
or diagnostic code is active before performing this procedure.
Perform open or short-circuit test at each wiring harness connection to
identify the correct wiring harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
DIAGNOSTIC CODE SET CONDITION
Engine ECM detects another controller has stopped transmitting a J1939 speed
request (TSC1) incorrectly or another controller has started transmitting a J1939
speed request incorrectly.
POSSIBLE CAUSE
CAN data link 1 resistor is open.
CAN data link 2 resistor is open.
Engine wiring harness high resistance or open.
Lower cab wiring harness high resistance or open.
Engine wiring harness shorted.
Lower cab wiring harness shorted.
Test Step 1. Check for Active
Diagnostic Codes.
1. Connect MSD and select C6.6 924
2. Start engine or attempt to start
Diagnostic Code 247-9 Active -
engine (TM 5-3805-298-10) while
Proceed to Test Step 2.
using MSD to check for active
Diagnostic Code 247-9 Not Active -
diagnostic codes (WP 0008).
Troubleshooting is complete.
Test Step 2. Test CAN Data Link
Circuit for Terminating Resistance.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
