Conditions Which Generate This Code:
This condition indicates that the battery circuit for the Electronic Control Module (ECM) is intermittent while the engine is running.
The ECM detects the following conditions:
• Three voltage readings that are below 6 Volts DC in a period of 7 seconds will be detected by the ECM. The voltage must subsequently increase to more than 9 Volts DC.
• The keyswitch is in the ON position.
• The engine is running.
• The engine is not cranking.
The diagnostic code will normally be logged. If equipped, the diagnostic lamp will flash. If the battery voltage disappears without returning, the ECM will not log this diagnostic code and the engine will shut down. This will be dependent on the length of time for the occurrence of the fault.
Possible Performance Effect:
The engine may experience changes in the engine rpm, and intermittent engine shutdowns or complete engine shutdowns while the conditions that cause this diagnostic code are present. The ECM may stop injecting fuel. This may be dependent on the length of time for the occurrence of the fault.
This diagnostic code detects intermittent voltage in the battery circuit for the Electronic Control Module (ECM) while the engine is running. Perform the following diagnostic procedure: “Ignition
Keyswitch Circuit and Battery Supply Circuit – Test”
• OK – STOP.
More trouble repair case for Perkins,pls refer to:Perkins Trouble Repair