Nissan Altima manuals

Nissan Altima (L32) 2007-2012 Service Manual: Power consumption control system

System Diagram

System 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.

- Front wiper fail-safe operation

- Outputting signals to actuators

- Switches or relays operating

- Auto active test is starting

- Emergency OFF

- 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.

Component Parts Location

1. BCM M16, M17, M18, M19, M20, M21 (view with instrument panel removed)

2. Combination meter M24

3. IPDM E/R E16, E17, E18, E200, E201, F10

Signal buffer system
System Diagram System Description • IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM via CAN communication. Refer to PCS-11, "Syst ...

Diagnosis system (IPDM E/R)
Diagnosis Description AUTO ACTIVE TEST Description In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation. • Oil pressure warning lamp ...

Other materials:

Low-pressure flexible hose
Removal and Installation for Low-Pressure Flexible Hose QR25DE Removal 1. Discharge the refrigerant. Refer to HA-32, "HFC-134a (R-134a) Service Procedure". 2. Remove the low-pressure flexible hose. Refer to HA-31, "Component". CAUTION: Cap or wrap the joint of the h ...

Front wiper blade
Removal and Installation REMOVAL 1. Lift the front wiper arm and wiper blade assembly away from the windshield. 2. Rotate the front wiper blade assembly and push the release tab (A), then move the front wiper blade assembly down (B) the front wiper arm. 3. Remove the front wiper blade as ...

Fuel gauge
System Diagram System Description The fuel gauge indicates the approximate fuel level in the fuel tank. The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied by the fuel level sensor unit.  Component Parts Location 1. Combination ...