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 1. Check for Active
590-12 Engine ECM Fails to
Diagnostic Codes.
Communicate with the
Connect MSD. Select Transmission
Diagnostic Code 590-12 Active -
Transmission ECM -
Proceed to Test Step 2.
924H and check for active diagnostic
Continued
codes (WP 0008).
Diagnostic Code 590-12 Not Active -
Troubleshooting is complete.
Test Step 1. Test Wiring Harness for
High Resistance or Open.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove right engine access panel
(WP 0348).
3. Disconnect connector EN-C1
(WP 0012, Figure 11) from engine
ECM connector J1.
4. Install a jumper wire between
terminal 23 and terminal 24 of
connector EN-C1 (WP 0012,
Figure 11).
5. Remove left lower cab access
panels (WP 0347).
6. Remove transmission ECM cover
(WP 0266).
7. Disconnect connector C-C12
(WP 0012, Figure 26) from
Transmission ECM J1.
8. Using digital multimeter
Resistance 2.0 Ohms or Less -
(WP 0174), measure resistance
Proceed to Test Step 4.
between connector C-C12
Resistance Greater Than 2.0 Ohms -
(WP 0012, Figure 26) terminal 10
Proceed to Test Step 3.
and terminal 20.
Test Step 2. Test Engine Wiring
Harness for High Resistance or
Open.
1. Remove right lower cab access
panels (WP 0347).
2. Disconnect connector EN-C8
(WP 0012, Figure 22) from
connector C-C19 (WP 0012,
Figure 23).
0096-9
