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) 5. Is continuity present from connector P901 pin 4 to connector P38 pin 1? CAUTION Read CAUTION on following page. TEST OPTIONS Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION This question eliminates possible problems and determines where troubleshooting continues. KNOWN INFO NO YES 6. Is continuity present from connector P38 socket 2 to a known good ground? TEST OPTIONS Continuity Test or STE/ICE-R Test #91 REASON FOR QUESTION KNOWN INFO Replace tachometer (para 7-21). YES NO If continuity is present, tachometer is faulty. 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. Faulty dashboard cable assembly. Faulty engine control cable assembly. Faulty tachometer. POSSIBLE PROBLEMS Tachometer illuminates. VOLTS gage OK. Engine speed sensor OK. Auxiliary panel cable assembly OK. Go to step 7 of this fault. Go to step 10 of this fault. TM 9-2320-365-20-1 2-354 Change 1