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1F – 114 ENGINE CONTROLS MAA1F040 DIAGNOSTIC TROUBLE CODE (DTC) – P1230 FUEL PUMP RELAY LOW VOLTAGE Circuit Description When the ignition switch is turned ON, the ECM will acti- The fuel pump will operate as long as the engine is Conditions for Setting the DTC D This DTC can be stored in “key-on” status. D An open or low voltage condition exists. Action Taken when the DTC Sets D The Malfunction Indicator Lamp (MIL) will illuminate. D The ECM will record operating conditions at the time D A history DTC is stored. D Coolant fan turns ON. Conditions for Clearing the MIL/DTC D The MIL will turn off after 4 consecutive ignition D A history DTC will clear after 40 consecutive warm up D DTC(s) can be cleared by using the scan tool. Diagnostic Aids An Intermittent problem may be caused by a poor con- Any circuitry, that is suspected as causing the com- D Backed-out terminals D Improper mating D Broken locks D Improperly formed D Damaged terminals D Poor terminals to wire connection D Physical damage to the wiring harness |