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Page Title: COOLANT TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE)
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TM9-2320-360-20-3 Section 4 TROUBLESHOOTING CHARTS E.   FLASHCODE:   15 J1587   CODE: P110  4  -  COOLANT  TEMPERATURE  CIRCUIT  FAILED  LOW  (LOW  VOLTAGE) OR: P175  4 -  OIL  TEMPERATURE  CIRCUIT  FAILED  LOW  (LOW  VOLTAGE) STEP/SEQUENCE RESULT WHAT  TO  DO  NEXT 15-5  Check  OTS Connectors l Inspect  terminals  at  the  OTS connector  (both  the  sensor and  harness  side)  for  damage; bent,  corroded,  and  unseated pins  or  sockets. 15-6 Check for Short l Turn  ignition  off. l Disconnect   engine   harness connector  at  the  ECM. l Read  resistance  between  sockets P3  (ckt  #133)  and  Y2  (ckt  #452) on  the  engine  harness  connector. l Also  read  resistance  between socket B of CTS connector and a  good  ground. 15-7 Check for Short l Turn  ignition  off. l Disconnect   engine   harness connector  at  the  ECM. l Read  resistance  between  sockets R2  (ckt  #120)  and  Y2  (ckt  #452) on  the  engine  harness  connector. l Also  read  resistance  between socket  B  of  OTS  connector  and a  good  ground. Terminals  and connectors  are  okay. Problem  found. Replace  OTS  (para  7-34). Then  go  to  15-30. Repair    terminals/connectors (para  7-77).  Then  go  to  15-30. on  either  reading. Signal  line (ckt #133) is shorted to the return line (ckt #452) or battery  ground.  Repair  short. Then  go  to  15-30. 10,000  ohms  or  open on  both  readings. Go  to  15-8. Less  than  or equal  to  10,000  ohms on  either  reading. Signal line (ckt #120) is shorted to  the  return  line  (ckt  #452)  or battery  ground.  Repair  short. Then  go  to  15-30. Greater  than 10,000  ohms  or  open on  both  readings. Go to 15-9. H-129

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