STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E.  FLASH CODE: 14 J1587 CODE: P110 3 COOLANT TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH) OR: P175 3- OIL TEMPERATURE CIRCUIT FAILED HIGH (VOLTAGE HIGH) 14-9  Open line Check Turn ignition off. Less than or Go to 14-11. Disconnect the engine harness equal to 5 ohms. connector at the ECM. Read resistance between sockets Greater than Signal line (ckt#120) or return R2 (ckt #120) and Y2 (ckt #452) 5 ohms or open. line (ckt #452) is open.  Re- on the engine harness connector. pair open.  Then go to 14-30. 14-10  Check ECM      Connectors Check terminals at the ECM Terminals and Reprogram ECM.  Then go engine harness connector (both connectors are okay. to 14-30. the ECM and harness side) for damage; bent, corroded, and Problem found. Repair terminals/connectors. unseated pins or sockets. Then go to 14-30. 14-11  Check ECM      Connectors Check terminals at the ECM Terminals and Reprogram ECM.  Then go engine harness connector (both connectors are okay. to 14-30. the ECM and harness side) for damage; bent, corroded, and Problem found. Repair terminals/connectors. unseated pins or sockets. Then go to 14-30. 14-30  Verify Repairs Turn ignition off. (No codes). Repairs are complete. Reconnect all connectors. Turn ignition on. Code 110/3 or 175/3 All system diagnostics are Clear codes. any other codes.) complete.  Please review this Note status of "Check Engine" section from the start to fin light. the error. If "Check Engine" light does not stay on, start engine and run until Any other codes Go to START-1, pg 3-345.41, "Check Engine" light comes on except Codes 110/3 to service other codes. or after 8 minutes.  Stop engine. or 175/3 Read inactive codes. Change 3  3-345.203