Nissan Rogue (T33) 2021-Present Service Manual: With Idle Start/stop :: System Description

Nissan Rogue (T33) 2021-Present Service Manual / Electrical & Power Control :: Charging System / With Idle Start/stop :: System Description

Component Parts

Component Parts Location

No. Component Function
1. Sub starter & generator Refer to Sub starter & generator.
2. Battery current sensor (with battery temperature sensor) Refer to 12V Battery Current Sensor .
3. ECM (Engine Control Module The ECM transmits the generator voltage request signal received from the IPDM E/R to the generator via LIN communication signal. Refer to Component Parts Location for detailed copmonent location.
4. IPDM E/R (Intelligent Power Distribution Module Engine Room) The IPDM E/R sends the generator voltage request signal to the ECM via CAN communication. Refer to Component Parts Location for detailed component location.
5. 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 (Type A) or Component Parts Location (Type B) for detailed component location .
6. Power network separate relay (If so equipped) Electric network separator cuts off the circuit between DC/DC converter side and 12 v sub-battery (Li-ion battery) side according to voltage fluctuation. Refer to POWER NETWORK SEPARATE RELAY.

Sub starter & generator

  • Sub starter & generator is installed to LH side of engine.

  • Sub starter & generator has integrated control unit, and transmits/receives signal via ECM and CAN communication.

  • Sub starter & generator controls power generation voltage by target power generation voltage based on recived power generation voltage request signal.

  • During normal driving, it performs generation control according to the power generation command signal from the ECM.

  • It also has self-diagnosis function.

  • ECM transmits target charging voltage value to sub starter & generator via CAN communication.

  • When sub starter & generator received the signal, it controls power generation voltage by incorporated control unit.

  • When the ECM determines that the Nissan Ariya vehicle is decelerating, it increases the amount of power generated by the sub starter & generator based on the reference values of each sensor, and recovers the power to the 12V battery.

  • For restart control, refer to System Description.

12V Battery Current Sensor

  • Battery current sensor is installed to 12V battery negative cable.

  • Battery current sensor transmits battery current sensor signal via LIN communication to IPDM E/R. Battery current sensor measure charging/discharging current of 12V battery and temperature around 12V battery, and sends its signal to IPDM E/R. IPDM E/R controls power generation by sending power generation command value signal based on following signals to ECM. As a result, engine load can be reduced.

  • Battery current sensor measures charging/discharging current of 12V battery and sends its signal to IPDM E/R.

  • Battery temperature sensor is integrated in battery current sensor. Battery temperature sensor measures temperature around 12V battery.

  • Battery current sensor measures charging/discharging current of 12V battery and sends its signal to IPDM E/R.

  • Battery temperature sensor measures temperature around 12V battery using IC temperature sensor.

System

Energy Management System

System Description

SYSTEM DIAGRAM

Component Function
Sub starter & generator Refer to Sub starter & generator.
IPDM E/R IPDM E/R monitors charge and discharge state of each battery. Calculate the power generation voltage request value according to the battery status and transmits to the ECM as a power generation voltage request signal.
ECM ECM transmits the received power generation voltage request signal to sub starter & generator via CAN communication.
Battery current sensor Refer to 12V Battery Current Sensor.

POWER GENERATION CONTROL

  • Battery current sensor (incorporated temperature sensor) transmits the 12V battery status to IPDM E/R via LIN communication.

  • IPDM E/R calculate the target power generation voltage according to battery status and transmits the power generation voltage request signal to ECM via CAN communication.

  • ECM transmits the alternator voltage request value signal to the sub starter & generator via CAN communication.

  • The sub starter & generator controls the generated voltage with the target power generation voltage based on the received alternator voltage request value signal.

  • When there is no power generation command signal, the sub starter & generator performs normal generation according to the control unit characteristics.

NOTE:

  • When something goes wrong with the variable power generation voltage control system, it will perform normal generation according to the control unit characteristics.

  • ECM determines Nissan Ariya vehicle condition and performs regenerative control.

REGENERATIVE CONTROL

  • When the ECM determines that the vehicle is decelerating, it increases the amount of power generated by the sub starter & generator based on the reference values of each sensor, and recovers the power to the 12V battery.

  • After deceleration is completed, it supplies stored power and stops power generation of sub starter & generator. At this time, the load on the engine is reduced and fuel efficiency is improved.

Information Display (combination Meter)

12V battery charge warning

DESIGN/PURPOSE

12V battery charge warning warns in following case with 12V battery charge warning lamp displaying.

NOTE:

For function of 12V battery charge warning lamp, refer to 12V Battery Charge Warning Lamp.

Symbol Message

-

SYNCHRONIZATION WITH MASTER WARNING LAMP

Synchronization is applied.

For master warning lamp, refer to Master Warning Lamp.

SYSTEM DIAGRAM

SYSTEM DIAGRAM

SIGNAL PATH

  • ECM transmits battery warning request signal (ECM) to combination meter via CAN communication when overvoltage or low voltage is detected on battery positive terminal or sub starter & generator malfunction.

  • IPDM E/R transmits battery warning request signal (IPDM E/R) to combination meter via CAN communication when overvoltage or low voltage is detected on battery positive terminal.

  • Combination meter indicates 12V battery charge warning judged with battery warning request signal received from ECM or IPDM E/R.

WARNING/INDICATOR OPERATING CONDITION

When any of the following symptoms occur while sub starter & generator is operating:

  • Communication between sub starter & generator and ECM is malfunction detected.

  • Communication between combination meter and ECM is malfunction detected.

  • Communication between combination meter and IPDM E/R is malfunction detected.

  • Sub starter & generator detected internal malfunction.

  • Overvoltage detected on battery positive terminal.

  • Low voltage detected on battery positive terminal.

  • When the engine stall is detected while stop/ start before Nissan Ariya vehicle halt is prohibited.

WARNING INDICATOR CANCEL CONDITION

Ignition switch is OFF.

TIMING CHART

Warning/indicator/chime List

Warning Lamps/Indicator Lamps

Item Design Reference
Charge warning lamp For layout, refer to Design (Type A) or Design (Type B).
For function, refer to 12V Battery Charge Warning Lamp (7 INCH INFORMATION DISPLAY) or 12V Battery Charge Warning Lamp (FULL TFT METER).

Diagnosis System (sub Starter & Generator)

CONSULT Function (SUB STARTER & GENERATOR)

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with sub starter & generator.

Diagnosis Mode CGW Status Description
Restriced Mode Diag Test Mode Open Mode
Self Diagnostic Result Display Display Display Display non-network DTC which Sub starter & generator memorizes.
ECU Identification Display Display Display Allows confirmation of Sub starter & generator part number.

SELF DIAGNOSTIC RESULT

Refer to

Freeze Frame Data (FFD)

The sub starter & generator records the vehicle condition at the time a particular DTC is detected, and displays on CONSULT.

Monitor Item [Unit] Description
ODO/TRIP METER [km] Displays the total mileage (Odometer value) of the moment a DTC is detected.

CGW INFORMATION

Display the diagnosis mode which a user can perform in Diag Test mode/Open Mode by switching the CGW status from Restricted mode to Diag Test Mode/Open Mode.

For the method of switching CAN Gateway status. Refer to CONSULT Function.

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