Nissan Maxima Service and Repair Manual: U0100 lost communication (ECM A)

DTC/circuit diagnosis

...

U1000 CAN comm circuit

Description CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excelle ...

Other materials:

P1720 VSS
Description ECM receives two vehicle speed signals via the CAN communication line. One is sent from "ABS actuator and electric unit (control unit)" via the combination meter, and the other is from TCM (Transmission control module). ECM uses these signals for engine control. DTC Logic DTC ...

Power steering oil pump
Inspection CAUTION: Make sure that belt tension is normal before starting the following procedure. Connect the Tool between oil pump discharge connector and high-pressure hose. Bleed air from the hydraulic circuit while opening the shut-off valve fully. Refer to ST-12, "Inspection". ...

Mechanical key
The Intelligent Key contains the mechanical key, which can be used in case of a discharged battery. To remove the mechanical key, release the lock knob on the back of the Intelligent Key. To install the mechanical key, firmly insert it into the Intelligent Key until the lock knob return ...