TM 5-3805-298-23-1
0096
Table 1. 590 Communication Diagnostic Codes - Continued.
096
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
4. Install lower cab access panels
590-2 Transmission
(WP 0347).
Communication Data Is
5. Turn battery disconnect switch ON
Erratic, Intermittent, or
(TM 5-3805-298-10).
Incorrect - Continued
6. Using MSD, check for active
Diagnostic Code 590-2 Transmission
diagnostic codes (WP 0008).
Communication Data Is Erratic,
Intermittent, or Incorrect Becomes
Inactive - Troubleshooting complete.
Diagnostic Code 590-2 Transmission
Communication Data Is Erratic,
Intermittent, or incorrect Remains
Active - Repeat troubleshooting from
the beginning.
NOTE
590-9 Transmission
Communication Abnormal
Always inspect wiring harness connectors that are involved in the circuit.
Update Rate
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 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.
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.
