2003 Nissan Altima - Power Supply, Ground & Circuit Elements (Section PG) (72 pages)

Posted on 22 Mar, 2015 by Patito
Model: 2003 Nissan Altima
File size: 2.44 MB


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Manual Description
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS, wiring Diagram — POWER — 5, bATTERY POWER SUPPLY — IGNITION SW, iGNITION POWER SUPPLY — IGNITION SW.

SYSTEMS CONTROLLED BY IPDM E/R 14, function of Detecting Ignition Relay Malfunction 19, iNSPECTION IN AUTO ACTIVE TEST MODE 20, iPDM E/R FUSE AND RELAY ARRANGEMENT 23.

IPDM E/R Power/Ground Circuit Inspection 23, removal and Installation IPDM E/R 24, hOW TO READ HARNESS LAYOUT 37, eNGINE ROOM HARNESS (LH VIEW) 41.

ENGINE ROOM HARNESS (RH VIEW) 44, wiring Diagram Codes (Cell Codes) 57, circuit Breaker (Built Into BCM) 63, for detailed ground distribution, refer PG-26, "Ground Distribution".

ACCESSORY POWER SUPPLY — IGNITION SW, iPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM), iPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box fuse block, which were originally placed in engine compartment.

IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil, it controls operation of each electrical part via BCM CAN communication lines, all IPDM E/R-integrated relays cannot be removed, using CAN communication line, it receives signal from BCM and controls following lamps.

Using CAN communication line, it receives signals from BCM and controls front wipers, using CAN communication line, it receives signals from BCM and controls the rear window defogger relay, using CAN communication line, it receives signal from ECM and controls A/C relay, using CAN communication line, it receives signal from ECM and controls cooling fan relay.

With CAN communication, by connecting each control unit using two communication lines (CAN L-line, CAN, h-line), it is possible to transmit maximum amount of information with minimum wiring, transmit and receive data, and read necessary information only, q When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.

After CAN communication recovers normally, it also returns normal control, q Operation of control parts by IPDM E/R during fail-safe mode follows, until ignition switch is turned OFF, status immediately before fail-safe control performed, in order to save power, IPDM E/R switches status by itself based each operating condition.

Q CAN communication is normally performed with other control units, q Individual unit control by IPDM E/R normally performed, when sleep request signal is received from BCM, mode is switched sleep waiting status, q Process to stop CAN communication activated.

Q All systems controlled by IPDM E/R are stopped, q IPDM E/R operates low current-consumption mode, q When a change in CAN communication line is detected, mode switches CAN communication status, cAN (Controller Area Network) is a serial communication line for real time application.

Control units during operation (not independent), communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring, each control unit transmits/receives data but selectively reads required data only, function of Detecting Ignition Relay Malfunction.

When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON tail, and parking lamps for 10 minutes to indicate IPDM E/R malfunction, in auto active test mode, operation inspection can be performed when IPDM E/R sends drive signal, close hood and lift wiper arms away from windshield (to prevent glass damage by wiper operation).

When auto active test is performed with hood opened, sprinkle water windshield beforehand, within seconds, turn the ignition switch ON and press the front door switch LH ten times, then turn, when auto active test mode is actuated, horn chirps once, and oil pressure warning lamp starts blinking.

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