TM 5-3805-262-203-34. BATTERY SYSTEM TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION2. BATTERIES DISCHARGED OR DO NOT MAINTAIN CHARGE (Cont).S t e p 1 . ( C o n t ).When UEH appears on display, dial 22 into TEST SELECT.Press and release TEST button.Check that VTM displays 22. If 22 is not displayed, STE/ICE is de-fective (refer to TM 9-4910-571-12&P).Connect transducer cable W4 connector P1 to VTM J2.Connect transducer cable W4 connector P2 to current probe (TK item11),Clamp current probe around battery positive cable with current probearrow pointing away from battery. Be sure current probe is closed.Shut off fuel by pulling fuel SHUT OFF control out.NOTEWhile cranking engine with bad or discharged batteries, VTM may losepower and come on again after cranking has stopped, displaying -----. Ifthis happens, turn off VTM power, and clean battery posts and clamps andtry again. If VTM still loses power, connect VTM to another vehicle’sbattery (refer to TM 9-4910-571-12&P). Connect test probe cable W2 toVTM J4 and red test clip to loader battery positive post and black testc l i p t o l o a d e r b a t t e r y n e g a t i v e p o s t . Y o u w i l l h a v e t o e n t e r V I D a n dcondition current probe again.Crank engines i t i o n.Dial 75 intofor 5 seconds then turn ignition key switch to off po-TEST SELECT.NOTEDial 79 into TEST SELECT if VTM is not powered by loader batteries.Press and hold TEST button until CAL appears on VTM display then re-lease TEST button.Wait for offset value to appear on display. Offset value should bebetween -225 to +225. If it is not, STE/ICE is defective (refer toTM 9-4910-571-12&P).Press and release TEST button.Wait for GO to appear on display.When GO appears, crank engine until OFF or an error message is dis-p l a y e d.Turn ignition key switch to off position.a. If VTM display is less than (TBD) milliohms/second (battery re-sistance change), go to step 2 below.3-287
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