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TM 5-4210-233-14&P-1
Table 4-2. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM - THROTTLE - Continued
3
HYDRAULIC TRANSMISSION MODULATION CONTROL SOLENOID NOT WORKING PROPERLY
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 13 of 16.)
Step 1.
Check fuse (7.5A location in dash comp.)
Replace fuse (see para 4-9.4).
Step 2.
Check relay for proper operation.
Replace relay (see para 4-9.4).
Step 3.
Check solenoid air valve for proper operation.
Replace valve. (see para 4-9.4)
Step 4.
Check wiring for continuity.
Replace wire (see para 4-9.4).
Step 5.
Refer to DDEC troubleshooting procedure.
4
HYDRAULIC TRANSMISSION MODULATION CONTROL VALVE DOES NOT OPERATE
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 13 of 16.)
Step 1.
Check Skinner air valve for proper operation.
Replace Skinner air valve (see para 4-9).
Step 2.
Check control relay for proper operation.
Replace relay (see para 4-9.4).
Step 3.
Check fuse.
Replace fuse (see para 4-9.4).
Step 4.
Check wiring for continuity.
Replace wire (see para 4-9.4).
Step 5.
Check DDEC ECM using Diagnostic Data Reader (DDR).
Replace DDEC ECM. Notify Direct Support.
4-106
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