TM-9-2320-365-20-1 LMTV Unit Maintenance Manual M1078 Series - Volume 1 Download
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e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT) 2. KNOWN INFO TEST OPTIONS Is engine speed sensor free from damage? Visual Inspection REASON FOR QUESTION A damaged engine speed sensor will cause tachometer to malfunction. NO YES 3. Does tachometer operate correctly after performing step 2? YES Fault corrected. NO Go to step 4 of this fault. TEST OPTIONS REASON FOR QUESTION This question eliminates possible problems and determines where troubleshooting continues. KNOWN INFO STE/ICE-R Test #10 Faulty engine speed sensor. Faulty dashboard cable assembly. Faulty auxiliary panel cable assembly. Faulty engine control cable assembly. Faulty tachometer. POSSIBLE PROBLEMS Tachometer illuminates. VOLTS gage OK. Engine speed sensor OK electrically. Faulty dashboard cable assembly. Faulty auxiliary panel cable assembly. Faulty engine control cable assembly. Faulty tachometer. POSSIBLE PROBLEMS Tachometer illuminates. VOLTS gage OK. Engine speed sensor OK. Replace engine speed sensor (para 7-38). TM 9-2320-365-20-1 2-350 Change 1