Nissan Pathfinder: Charging System - System Description

Nissan Pathfinder (R53) 2022-2025 Service Manual / Electrical & Power Control :: Charging System / System Description

Component Parts. Charging System Nissan Pathfinder Fifth generation

View with engine and transmission removed

Engine room left side

No.	Component	Function
1.	ECM (Engine Control Module)	ECM transmits the received generator voltage request signal to the generator via LIN communication signal. Refer to Component Parts Location for detailed component location.
2.	IPDM E/R (Intelligent Power Distribution Module Engine Room)	IPDM E/R sends the generator voltage request signal to ECM via CAN communication. Refer to System Description.
3.	Combination meter	The control module inside generator warning function activates to illuminate the charge warning lamp if any of the following symptoms occur while generator is operating: Excessive voltage is produced No voltage is produced Refer to Component Parts Location (full TFT meter) or Component Parts Location (7 inch information display meter) for detailed component location.
4.	Generator	Refer to Generator.
5.	Battery current sensor	Refer to Battery Current Sensor.

The generator is mounted on the front of the engine, near the top.
The generator provides DC voltage to operate the Nissan Pathfinder vehicle's electrical system and to keep the battery charged.

INPUT SIGNAL AND OUTPUT SIGNAL CHART

Component	Signal
IPDM E/R	Generator voltage request signal via CAN communication
Generator	Generator voltage request signal (via LIN communication)
Battery current sensor	Battery current signal (via LIN communication)
Combination meter	Charging indicator request signal

SYSTEM DESCRIPTION

The battery current sensor measures the charging/discharging current of the battery.
The generator provides DC voltage to operate the Nissan Pathfinder vehicle's electrical system and to keep the battery charged. The voltage output is controlled by the ECM.
Control module inside the generator controls the power generation voltage based on the received generator voltage request signal.

SYSTEM DESCRIPTION

INPUT SIGNAL AND OUTPUT SIGNAL CHART

Multiple signals are transmitted from the following units to the ECM:

Component	Signal
IPDM E/R	Generator voltage request signal (via CAN communication)
Generator	Generator voltage request signal (via LIN communication)
Battery current sensor	Battery current signal (via LIN communication)

SYSTEM DESCRIPTION

Battery current sensor measures the charging/discharging current of the battery.
ECM judges battery condition according to the charging/discharging current of the battery.
ECM transmits generator voltage request signal to generator via LIN communication.
Control module inside generator controls the power generation voltage based on the received generator voltage request signal.
Generator includes a self-diagnosis function and transmits the diagnosis result to ECM via LIN communication when detecting any malfunction.

Item	Design	Reference
Charge warning lamp		For layout, refer to Design (full TFT meter) or Design (7 inch information display meter).
Charge warning lamp		For function, refer to System Description.