Fuel Pump
The fuel pump (FP) is located on the inside of the fuel tank on the right-hand side. The pump is checked by the fuel pump control module. The central electronic module (CEM) controls a relay which powers the fuel pump control unit. The relay is directly connected to the central electronic module (CEM).
The central electronic module (CEM) uses the controller area network (CAN) to communicate with the engine control module (ECM) to control the fuel pump (FP). There is also a directly connected cable between the engine control module (ECM) and the fuel pump control module. This is used to transmit a pulsed signal to operate the fuel pump (FP).
The central electronic module (CEM) also communicates with the supplemental restraint system (SRS) module via the controller area network (CAN). In the event of a collision, the supplemental restraint system module (SRS) transmits data and the central electronic module (CEM) shuts off the power supply to the fuel pump (FP).
There are diagnostics for the input signal from the engine control module (ECM) and the relay for the power supply to the fuel pump control module.