TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 362 of 890
TM 9-2320-280-20-1 KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION NO YES NO YES NO YES STARTER CIRCUIT A FROM 3, Page 2-264 A1 DOES THE ENGINE CRANK AT ALL? ENGINE DOESN'T CRANK AT 200 RPM BATTERIES STARTER NEUTRAL SAFETY SWITCH CABLES/WIRING ENGINE MECHANICAL ROTARY SWITCH PCB/DISTRIBUTION BOX GO TO E, Page 2-284 LISTEN If the engine cranks, then the rotary switch, neutral safety switch and PCB/distribution box are all working. A2 IS THE BATTERY VOLTAGE 23-25 VOLTS? ENGINE CRANKS SLOW BATTERIES STARTER ENGINE MECHANICAL CABLES/CONNECTIONS 1. STE/ICE-R TEST 67 (Page 2-740) 2. MULTIMETER If batteries are weak they can't provide enough current to crank the engine properly. REPLACE BATTERIES OR CHECK EACH BATTERY A3 IS THE BATTERY VOLTAGE AT LEAST 18.5 VOLTS DURING CRANKING? 1. STE/ICE-R TEST 67 (Page 2-740) 2. MULTIMETER Batteries must be able to maintain voltage or the engine won't crank. BATTERY VOLTS OK STARTER OK WEAK BATTERIES ENGINE MECHANICAL CABLES/CONNECTORS STARTER REPLACE BATTERIES 2-268 Change 1 GO TO A4, Page 2-270 DIAGNOSTIC FLOWCHART