Code 78 - Fuel Pump Control Signal

Data Trouble Code No.78 - Fuel Pump Control Signal

Detecting Condition
Open or short in fuel pump circuit for 1 second or more with engine speed 1,000 rpm or less. (2 trip detection)
or
Open in input circuit of fuel pump ECU with engine speed 1,000 rpm or less. (2 trip detection)
or
Open or short in diagnostic signal line (DI) of fuel pump ECU with engine speed of 1,000 rpm or less. (2 trip detection)

Trouble Area
^ Open or short in fuel pump ECU circuit.
^ Fuel pump ECU.
^ Fuel pump.
^ ECM power source circuit.
^ ECM.

Malfunction Indicator Lamp
Normal Mode OFF
Test Mode ON

Recorded in memory?
Yes