Nissan Rogue Service Manual: System description

Nissan Rogue Service Manual / Electrical & power control / Power Control System / IPDM E/R / System description

COMPONENT PARTS

Component Parts Location

Component Parts Location

IPDM E/R
Engine compartment (LH)

SYSTEM

RELAY CONTROL SYSTEM

RELAY CONTROL SYSTEM : System Description

SYSTEM DIAGRAM

System diagram

DESCRIPTION

IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input signals from various sensors and the request signals received from control units via CAN communication.

CAUTION: IPDM E/R integrated relays cannot be removed.

Description

RELAY CONTROL SYSTEM : Fail-safe

CAN COMMUNICATION CONTROL

When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN communication recovers normally, it also returns to normal control.

If No CAN Communication Is Available With ECM

Control part	Fail-safe operation
Cooling fan	The cooling fan relay-1 turn ON when the ignition switch is turned ON (Cooling fan HI operation) The cooling fan relay-1 turn OFF when the ignition switch is turned OFF
A/C compressor	A/C relay OFF

If No CAN Communication Is Available With BCM

Control part	Fail-safe operation
Front wiper motor	The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF while the front wiper is operating at LO or HI speed. The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control is activated while the front wiper is set in the INT mode and the front wiper motor is operating. Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control is activated while front wiper motor is operated and wiper stop in the other position than stop position.
Horn	Horn OFF
Ignition relay-1	The status just before activation of fail-safe is maintained.
Starter motor	Starter relay OFF

IGNITION RELAY MALFUNCTION DETECTION FUNCTION

IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay-1 inside it.
IPDM E/R judges the ignition relay-1 error if the voltage differs between the contact circuit and the excitation coil circuit.

Ignition relay malfunction detection function

FRONT WIPER CONTROL

IPDM E/R detects front wiper stop position by a front wiper auto stop signal.

When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper after repeating a front wiper 10 second activation and 20 second stop five times.

NOTE: This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item “WIP PROT” while the wiper is stopped.

STARTER MOTOR PROTECTION FUNCTION

IPDM E/R turns OFF the starter relay to protect the starter motor when the starter relay remains active for 90 seconds.

SMART FIELD-EFFECT TRANSISTOR (FET)

SMART FIELD-EFFECT TRANSISTOR (FET) : System Description

System Description

A smart Field-Effect Transistor (FET) is a transistor used to monitor and control current flow on module outputs.

The IPDM E/R uses a smart FET protection strategy to prevent module damage in the event of excessive current flow. The smart FET protection strategy monitors its outputs for excessive current, and when a fault occurs, shuts down the output and records a DTC.

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM : System Description

SYSTEM DIAGRAM

System diagram

DESCRIPTION

Outline

IPDM E/R incorporates a power consumption control function that reduces the power consumption according to the vehicle status.
IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN communication.

Normal mode (wake-up)

CAN communication is normally performed with other control units.
Individual unit control by IPDM E/R is normally performed.

Low power consumption mode (sleep)

Low power consumption control is active.
CAN transmission is stopped.

Sleep Mode Activation

IPDM E/R judges that the sleep-ready conditions are fulfilled when the ignition switch is OFF and none of the conditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communication.

Outputting signals to actuators
Switches or relays operating
Output requests are being received from control units via CAN communication.

IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.

Wake-up Operation

IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep wake-up signal (wake up) from BCM or any of the following conditions is fulfilled. In addition, it transmits a sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start.

Ignition switch ON
An output request is received from a control unit via CAN communication.

DIAGNOSIS SYSTEM (IPDM E/R)

CONSULT Function (IPDM E/R)

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with IPDM E/R.

Application item

ECU IDENTIFICATION

The IPDM E/R part number is displayed.

SELF DIAGNOSTIC RESULT

Refer to PCS-20, "DTC Index".

DATA MONITOR

Data monitor

ACTIVE TEST

Active test

CAN DIAG SUPPORT MNTR

Refer to LAN-14, "CAN Diagnostic Support Monitor".

Precaution

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ECU diagnosis information

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