Figure 2-55. Disconnecting power cables.

TM 5-6675-250-34

Table 2-1. Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

TS 006294

Figure 2-55. Disconnecting power cables.

If the system operates correctly with the new ECU, report the bad ECU to the next higher level of main-

tenance.

Step 3 Check for a defective GRU.

Replace existing GRU with a GRU that is operable, by disconnecting and connecting power cables (fig. 2-56).

TS 006295

Figure 2-56. Gyroscopic reference unit power cable removal.

If the system operates correctly with the new GRU, report the bad GRU to the next higher level of main-

tenance.

Step 4 deleted

Change 1