TM 5-3805-298-23-1
0096
Table 1. 590 Communication Diagnostic Codes - Continued.
096
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 6. Verify Malfunction Is
590-9 Transmission
Resolved.
Communication Abnormal
Update Rate - Continued
1. Ensure all wiring harness
connectors are connected.
2. Install right engine access panel
(WP 0348).
3. Install transmission ECM cover
(WP 0266).
4. Install lower cab access panels
(WP 0347).
5. Turn battery disconnect switch ON
(TM 5-3805-298-10).
6. Using MSD, check for active
Diagnostic Code 590-9 Transmission
diagnostic codes (WP 0008).
Communication Abnormal Update
Rate Becomes Inactive -
Troubleshooting complete.
Diagnostic Code 590-9 Transmission
Communication Abnormal Update
Rate Remains Active - Repeat
troubleshooting from the beginning.
NOTE
590-12 Engine ECM Fails to
Communicate with the
Always inspect harness connectors that are involved in the circuit. Poor
Transmission ECM
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 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 does not receive the expected information from 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.
