Maxima SE V6-3.0L (VQ30DE) (1998)
Fuel Pump Relay: Testing and Inspection
Non-Trouble Code Diagnostic Procedures
SYSTEM DESCRIPTION
Fuel pump ON-OFF control
The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine start-up. If the ECM receives a 1° signal
from the crankshaft position sensor (POS), it knows that the engine is rotating, and causes the pump to activate. If the 10 signal is not received when the
ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents the battery from discharging, thereby improving safety. The ECM
does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump.
CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Specification data are reference values.
ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values, and are measured between each terminal and (25) (ECCS ground).