TM 5-3805-298-23-1
0109
Table 1. 1251 Alternator R - Terminal Diagnostic Codes - Continued.
0109
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 1. Check for Active
1251-1 Alternator R Data
Diagnostic Codes.
Valid but Below Normal
Connect MSD (WP 0008). Select
Operational Range -
Diagnostic Code 1251-1 Active -
Transmission 924H and start engine
Proceed to Test Step 2.
Continued
(TM 5-3805-298-10). Using MSD,
Diagnostic Code 1251-1 Not Active -
check for active diagnostic codes
Troubleshooting is complete.
Test Step 2. Test Alternator Output R.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Disconnect connector R
(WP 0012, Figure 92) from
alternator.
3. Turn battery disconnect switch to
ON position and start engine
(TM 5-3805-298-10).
4. Using digital multimeter
Voltage 11 to 32 VAC Proceed to
(WP 0174), test for AC voltage
Test Step 3.
between alternator terminal R stud
Voltage Less Than 11 VAC Replace
and ground.
alternator (WP 0238).
Proceed to Test Step 5.
Test Step 3. Test Engine Wiring
Harness for Short to Ground.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove right lower cab access
panels (WP 0347).
3. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
4. Using digital multimeter
Continuity Replace engine wiring
(WP 0174), test for continuity
harness (WP 0299).
between connector EN-C2
Proceed to Test Step 5.
(WP 0012, Figure 12) terminal 3
No Continuity Proceed to step 5.
and terminal 17.
5. Using digital multimeter
Continuity Replace engine wiring
(WP 0174), test for continuity
harness (WP 0299).
between connector EN-C2
Proceed to Test Step 5.
(WP 0012, Figure 12) terminal 3
No Continuity Proceed to Test
and ground.
Step 4.
0109-5
