STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E.  FLASH CODE:    11 J1587 CODE: P187 4 · POWER TAKE OFF INPUT FAILED LOW (VOLTAGE LOW) (ALSO CALLED VARIABLE SPEED GOVERNOR .  VSG) 11-9 Check ECM Connectors Check terminals at the ECM Terminals and Reprogram ECM.  Then go to vehicle harness connector (both connectors are okay. 11-30. the ECM and harness side) for damage; bent, corroded, and Problem found Repair terminals/connectors. unseated pins or sockets. Then go to 11-30. 11-10 Check for Short Turn ignition off. Less than or The vehicle +5 Volt line Disconnect the vehicle harness equal to 10,000 ohms. (ckt#916) is shorted to the connector at the ECM. return line (ckt#952).  Repair Read resistance between sockets short.  Then go to 11-30. A and C on the PTOSA harness connector.   Greater than Go to 11-11. 10,000 ohms or open. 11-11 Check Check for Open +5 Volt line Install a jumper wire between Less than Go to 11-9. sockets A and C of the PTOSA or equal to 5 ohms. harness connector. Read resistance between sockets Greater than The vehicle +5 Volt line (ckt A3(916) & C3(952) on the vehicle 5 ohms or open. #916) is open.  Repair open. connector. Then go to 11-30. 11-12 Check for Short to Battery + Turn ignition off. All readings are Go to 11-13. Remove both fuses to ECM. greater than 10,000 Disconnect 5 way power connector ohms or open. at the ECM. Read resistance between sockets Any reading is A short exists between D1 (510) & B3(439) on the vehicle less than or equal sockets where less the 10,000 harness connector to 10,000 ohms. ohms resistance was read. Also read resistance between Repair short and reinsert socket D1 (510) on the vehicle fuses.  Then go to 11-30. harness connector and the following sockets on the 5 way power connector: C, D, E, and B. Change 3  3-345.185