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Page Title: VEHICLE HARNESS +5 VOLTS SUPPLY
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TM   9-2320-360-20-3 Section  4 TROUBLESHOOTING   CHARTS E. VEH5V - VEHICLE HARNESS +5 VOLTS SUPPLY STEP/SEQUENCE VEH5V-1 Check  for  Low Battery   Voltage Was there also a Code 168/1 ? NOTE - This chart is only to be used if: 1)  All  basic  mechanical  checks  and  physical  inspections  have  been  performed  with  no  problem  found,  and 2)  Diagnosis  of  DDEC-III  was  started  at  step  START-1,  pg  H-25  and  you  have  now  been  referred  here. RESULT WHAT  TO  DO  NEXT Yes. Go  to  46-1  (page  H-217) No. Go to VEH5V-2. VEH5V-2 Check for +5 Volts at TPS Turn ignition off. Disconnect  the  Throttle  Position Sensor  (TPS)  connector. Turn ignition on. Read  voltage  on  the  TPS connector,  pin  C  (red  lead)  to  pin A  (black  lead). VEH5V-3 Check for +5 Volts or Return Open Turn  ignition  off. Disconnect  the  vehicle  harness connector  at  the  ECM. Install  a  jumper  wire  between  pins A  and  C  of  the  TPS  connector. Read   resistance   between   sockets A3  and  C3  of  the  vehicle  harness connector. Less  than 4.7  volts. Go to VEH5V-3. Greater  than 5.2 volts. Go to VEH5V-11. Between  4.7 and 5.2 volts. Go  to  VEH5V-8. Less  than or equal to 5 ohms. o  to  VEH5V-4. Greater  than 5 ohms or open. Either the engine +5 volt line (ckt  #916)  or  the  sensor  return line  (ckt  #952)  is  open.  Repair open.  Then  go  to  VEH5V-30. H-247

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