DTC P1287: FUEL INJECTION PUMP CONTROLLER SUPPLY VOLTAGE LOW
Monitor & Set Conditions
Fuel injection pump controller supply voltage is monitored when ignition is on. DTC may be stored if low voltage exists.
- Charging System Not Operating Properly
Check that charging system is operating properly. If charging system operates properly, test is complete. If charging system does not operate properly, perform CHARGING SYSTEM test under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING - RAM PICKUP - DIESEL article.