TM 5-3805-298-23-1
0055
Table 1. 247 SAE J1939 Data Link Diagnostic Codes - Continued.
055
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
2. Remove right engine access panel
247-9 SAE J1939 Data Link
(WP 0348).
Abnormal Update Rate -
3. Disconnect connector EN-C1
Continued
(WP 0012, Figure 11) from engine
ECM connector J1.
4. Using digital multimeter
Resistance 50 to 70 Ohms - Proceed
(WP 0174), measure resistance
to Test Step 3.
between connector EN-C1
Resistance Greater Than 70 Ohms -
(WP 0012, Figure 11) terminal 20
Proceed to Test Step 5.
and terminal 21.
Resistance Less Than 50 Ohms -
Proceed to Test Step 6.
Test Step 3. 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).
3. Connect jumper wire between
terminal 1 and terminal 12 of
connector EN-C8 (WP 0012,
Figure 22).
4. Using digital multimeter
Resistance 2.0 Ohms or Less -
(WP 0174), measure resistance
Proceed to Test Step 4.
between connector EN-C1
Resistance Greater Than 2.0 Ohms -
(WP 0012, Figure 11) terminal 20
Replace engine wiring harness
and terminal 21.
(WP 0299).
Proceed to Test Step 6.
Test Step 4. Test Lower Cab Wiring
Harness for High Resistance or
Open.
1. Disconnect jumper wire between
terminal 1 and terminal 12 of
connector EN-C8 (WP 0012,
Figure 22).
2. Install jumper wire between
terminal 1 and terminal 12 of
connector C-C19 (WP 0012,
Figure 23).
3. Remove left lower cab access
panels (WP 0347).
4. Remove transmission ECM cover
(WP 0266).
0055-3