TM 5-3805-298-23-1
0096
Table 1. 590 Communication Diagnostic Codes.
0096
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
590-2 Transmission
Communication Data Is
Always inspect wiring harness connectors that are involved in the circuit.
Erratic, Intermittent, or
Poor connections can often be the cause of a problem in an electrical
Incorrect
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
Transmission ECM cannot communicate with the engine ECM or the ECM
appears to work intermittently.
POSSIBLE CAUSE
Lower cab wiring harness is open.
Lower cab wiring harness is shorted to voltage.
Lower cab wiring harness is shorted to ground.
Engine wiring harness is open.
Engine wiring harness is shorted to voltage.
Engine wiring harness is shorted to ground.
Engine ECM.
Test Step 1. Check for Active
Diagnostic Codes.
Connect MSD. Select Transmission
Diagnostic Code 590-2 Active -
924H and check for active diagnostic
Proceed to Test Step 2.
codes (WP 0008).
Diagnostic Code 590-2 Not Active -
Troubleshooting is complete.
Test Step 2. Test Wiring Harness for
High Resistance or Open.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).