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K ELECTRICAL

POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
SECTION PG B

E
CONTENTS
POWER SUPPLY ROUTING CIRCUIT ..................... 3 . HARNESS ................................................................ 37
. F
Schematic ............................................................... 3
. Harness Layout ..................................................... 37 .
Wiring Diagram -- POWER -- ................................ 5 . HOW TO READ HARNESS LAYOUT ................ 37 .
BATTERY POWER SUPPLY -- IGNITION SW. OUTLINE ............................................................ 38. G
IN ANY POSITION ............................................... 5 . MAIN HARNESS ................................................ 39 .
ACCESSORY POWER SUPPLY -- IGNITION ENGINE ROOM LH HARNESS ......................... 41 .
SW. IN ACC OR ON ............................................. 9 . ENGINE ROOM RH HARNESS ......................... 44 .
H
IGNITION POWER SUPPLY -- IGNITION SW. ENGINE CONTROL HARNESS (QR25DE) ....... 46 .
IN ON ................................................................. 10
. ENGINE CONTROL HARNESS (VQ35DE) ....... 48 .
IGNITION POWER SUPPLY -- IGNITION SW. BODY HARNESS ............................................... 50 .
IN ON AND/OR START .......................................11 . BODY NO. 2 HARNESS .................................... 52 . I
IPDM E/R (INTELLIGENT POWER DISTRIBUTION ROOM LAMP HARNESS ................................... 54 .
MODULE ENGINE ROOM) ..................................... 14 . FRONT DOOR LH HARNESS ........................... 55 .
System Description ............................................... 14 . FRONT DOOR RH HARNESS ........................... 55 . J
SYSTEMS CONTROLLED BY IPDM E/R .......... 14 . REAR DOOR LH HARNESS .............................. 56 .
CAN COMMUNICATION LINE CONTROL ........ 14 . REAR DOOR RH HARNESS ............................. 56 .
IPDM E/R STATUS CONTROL .......................... 14 . Wiring Diagram Codes (Cell Codes) ..................... 57 .
PG
CAN Communication System Description ............. 15 . ELECTRICAL UNITS LOCATION ........................... 60 .
FOR TCS MODELS ........................................... 15 . Electrical Units Location ........................................ 60 .
FOR A/T MODELS ............................................. 16 . ENGINE COMPARTMENT ................................. 60 .
FOR M/T MODELS ............................................ 18 . PASSENGER COMPARTMENT ........................ 61 . L
Function of Detecting Ignition Relay Malfunction ... 19 Fuse ....................................................................... 63
.
Auto Active Test .................................................... 19
. Fusible Link ........................................................... 63
.
DESCRIPTION ................................................... 19 . Circuit Breaker (Built Into BCM) ............................ 63 . M
OPERATION PROCEDURE .............................. 19 . HARNESS CONNECTOR ........................................ 64 .
INSPECTION IN AUTO ACTIVE TEST MODE ... 20 Description ............................................................. 64
.
Schematic ............................................................. 22
. HARNESS CONNECTOR (TAB-LOCKING
IPDM E/R FUSE AND RELAY ARRANGEMENT 23 ... TYPE) ................................................................. 64
.
IPDM E/R TERMINAL ARRANGEMENT ........... 23 . HARNESS CONNECTOR (SLIDE-LOCKING
IPDM E/R Power/Ground Circuit Inspection ......... 23 . TYPE) ................................................................. 65
.
Removal and Installation of IPDM E/R .................. 24 . JOINT CONNECTOR (J/C) ...................................... 66 .
GROUND CIRCUIT .................................................. 26 . Terminal Arrangement ........................................... 66 .
Ground Distribution ............................................... 26. ELECTRICAL UNITS ............................................... 67 .
MAIN HARNESS ................................................ 26 . Terminal Arrangement ........................................... 67 .
ENGINE ROOM LH HARNESS ......................... 28 . SMJ (SUPER MULTIPLE JUNCTION) .................... 68 .
ENGINE ROOM RH HARNESS ......................... 29 . Terminal Arrangement ........................................... 68 .
ENGINE CONTROL HARNESS (QR25DE) ....... 30 . STANDARDIZED RELAY ......................................... 69 .
ENGINE CONTROL HARNESS (VQ35DE) ....... 32 . Description ............................................................. 69
.
BODY HARNESS ............................................... 34 . NORMAL OPEN, NORMAL CLOSED AND
BODY NO. 2 HARNESS .................................... 35 .

PG-1
MIXED TYPE RELAYS ....................................... 69
. FUSE AND FUSIBLE LINK BOX .............................72 .
TYPE OF STANDARDIZED RELAYS ................. 69 . Terminal Arrangement ............................................72
.
FUSE BLOCK-JUNCTION BOX(J/B) ...................... 71 .
Terminal Arrangement ........................................... 71
.

PG-2
POWER SUPPLY ROUTING CIRCUIT

POWER SUPPLY ROUTING CIRCUIT PFP:24110
A
Schematic EKS002L5

For detailed ground distribution, refer to PG-26, "Ground Distribution" .
B

WKWA0093E

PG-3
POWER SUPPLY ROUTING CIRCUIT

WKWA0094E

PG-4
POWER SUPPLY ROUTING CIRCUIT

Wiring Diagram -- POWER -- EKS002L6

BATTERY POWER SUPPLY -- IGNITION SW. IN ANY POSITION A

WKWA0393E

PG-5
POWER SUPPLY ROUTING CIRCUIT

WKWA0085E

PG-6
POWER SUPPLY ROUTING CIRCUIT

WKWA0086E

PG-7
POWER SUPPLY ROUTING CIRCUIT

WKWA0087E

PG-8
POWER SUPPLY ROUTING CIRCUIT

ACCESSORY POWER SUPPLY -- IGNITION SW. IN ACC OR ON
A

WKWA0088E

PG-9
POWER SUPPLY ROUTING CIRCUIT

IGNITION POWER SUPPLY -- IGNITION SW. IN ON

WKWA0089E

PG-10
POWER SUPPLY ROUTING CIRCUIT

IGNITION POWER SUPPLY -- IGNITION SW. IN ON AND/OR START
A

WKWA0090E

PG-11
POWER SUPPLY ROUTING CIRCUIT

WKWA0091E

PG-12
POWER SUPPLY ROUTING CIRCUIT

WKWA0092E

PG-13
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7

System Description EKS002L7

q IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
which were originally placed in engine compartment. It controls integrated relay via IPDM E/R control cir-
cuit.
q IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil
pressure switch signal reception, etc.
q It controls operation of each electrical part via BCM and CAN communication lines.
CAUTION:
All IPDM E/R-integrated relays cannot be removed.
SYSTEMS CONTROLLED BY IPDM E/R
1. Lamp control
Using CAN communication line, it receives signal from BCM and controls the following lamps:
q Headlamps (Hi, Lo)
q Parking lamps
q Tail lamps
q Front fog lamps
2. Wiper control
Using CAN communication line, it receives signals from BCM and controls the front wipers.
3. Rear window defogger relay control
Using CAN communication line, it receives signals from BCM and controls the rear window defogger relay.
4. A/C compressor control
Using CAN communication line, it receives signal from ECM and controls the A/C relay.
5. Cooling fan control
Using CAN communication line, it receives signal from ECM and controls cooling fan relay.
CAN COMMUNICATION LINE CONTROL
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. Each control unit can
transmit and receive data, and read necessary information only.
1. Fail-safe control
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 to normal control.
q Operation of control parts by IPDM E/R during fail-safe mode is as follows:

Controlled parts Fail-safe mode
Headlamps Headlamp relay (Lo) ON
Front fog lamps Front fog lamp relay OFF
Tail and parking lamps Tail lamp relay OFF
Until ignition switch is turned OFF, status immediately before fail-safe control is performed
Front wipers
is maintained.
Rear window defogger Rear window defogger relay OFF
Cooling fan Cooling fan (HI) ON
A/C compressor A/C relay OFF

IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status by itself based on each operating condition.
1. CAN communication status
q CAN communication is normally performed with other control units.

q Individual unit control by IPDM E/R is normally performed.

PG-14
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

q When sleep request signal is received from BCM, mode is switched to sleep waiting status.
2. Sleep waiting status A
q Process to stop CAN communication is activated.

q All systems controlled by IPDM E/R are stopped. When 3 seconds have elapsed after CAN communi-
cation with other control units is stopped, mode switches to sleep status. B
3. Sleep status
q IPDM E/R operates in low current-consumption mode.
C
q CAN communication is stopped.

q When a change in CAN communication line is detected, mode switches to CAN communication status.

CAN Communication System Description EKS002L8 D
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other E
control units during operation (not independent). In CAN communication, control units are connected with 2
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. F
FOR TCS MODELS
System diagram
G

LKIA0015E J
Input/output signal chart
T: Transmit R: Receive
COMBINA- PG
ABS/TCS
Signals ECM TCM TION BCM IPDM E/R
control unit
METER
Engine speed signal T R R L
Engine coolant temperature signal T R
Accelerator pedal position signal T
M
Fuel consumption monitor signal T R
A/T warning lamp signal T R
A/T position indicator signal R R R(R range only) R
ABS operation signal R T
TCS operation signal R R T
Air conditioner switch signal R T
Air conditioner compressor signal R T
A/C compressor request signal T R
Cooling fan motor operation signal R T
Cooling fan speed request signal T R
Position lights request R T R
Position lights status R T
Low beam request T R

PG-15
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

COMBINA-
ABS/TCS
Signals ECM TCM TION BCM IPDM E/R
control unit
METER
Low beam status R R T
High beam request R T R
High beam status R R T
Front fog lights request T R
Front fog light status R T
OD cancel switch signal R T R
Brake switch signal R T
R T
Vehicle speed signal
R T R
Oil pressure switch R T
Sleep request1 R T
Sleep request2 T R
N range switch signal R T
P range switch signal R T
Seat belt buckle switch signal T R
Door switch signal R T R
Tail lamp request R T R
Turn indicator signal R T
Buzzer output signal R T
Trunk switch signal R T
ASCD main switch signal T R
ASCD cruise signal T R
Wiper operation R T
Wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control sig-
R R T
nal

FOR A/T MODELS
System diagram

LKIA0017E

Input/output signal chart
T: Transmit R: Receive
COMBINATION
Signals ECM TCM BCM IPDM E/R
METER
Engine speed signal T R
Engine coolant temperature signal T R

PG-16
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

COMBINATION
Signals ECM TCM BCM IPDM E/R
METER A
Accelerator pedal position signal T R
Fuel consumption monitor signal T R
B
A/T warning lamp signal T R
A/T position indicator signal R T R R(R range only)
Air conditioner switch signal R T C
Air conditioner compressor signal R T
A/C compressor request signal T R
D
Blower fan switch signal R(QR25DE) T
Cooling fan motor operation signal R T
Cooling fan speed request signal T R E
Position lights request R T R
Position lights status R T
F
Low beam request T R
Low beam status R R T
High beam request R T R G
High beam status R R T
Front fog lights request T R
H
Front fog light status R T
OD cancel switch signal R T R
Brake switch signal R T I
R T
Vehicle speed signal
R T R
Oil pressure switch R T J
Sleep request1 R T
Sleep request2 T R
PG
N range switch signal R T
P range switch signal R T
Seat belt buckle switch signal T R L
Door switch signal R T R
Tail lamp request R T R
M
Turn indicator signal R T
Buzzer output signal R T
Trunk switch signal R T
ASCD main switch signal T R
ASCD cruise signal T R
Wiper operation R T
Wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control signal R R T

PG-17
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

FOR M/T MODELS
System diagram

LKIA0018E

Input/output signal chart
T: Transmit R: Receive
COMBINATION
Signals ECM BCM IPDM E/R
METER
Engine speed signal T
Engine coolant temperature signal T
Fuel consumption monitor signal T
Air conditioner switch signal R T
Air conditioner compressor signal R T
A/C compressor request signal T R
Blower fan switch signal R(QR25DE) T

Cooling fan motor operation signal R T
Cooling fan speed request signal T R
Position lights request R T R
Position lights status R T
Low beam request T R
Low beam status R R T
High beam request R T R
High beam status R R T
Front fog lights request T R
Front fog light status R T
Vehicle speed signal R T
Oil pressure switch R T
Sleep request1 R T
Sleep request2 T R
Seat belt buckle switch signal T R
Door switch signal R T R
Tail lamp request R T R
Turn indicator signal R T
Buzzer output signal R T
Trunk switch signal R T
ASCD main switch signal T R
ASCD cruise signal T R
Wiper operation R T
Wiper stop position signal R T

PG-18
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

COMBINATION
Signals ECM BCM IPDM E/R
METER A
Rear window defogger switch signal T R
Rear window defogger control signal R R T
B
Function of Detecting Ignition Relay Malfunction EKS002L9

q 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. C

Auto Active Test EKS002LA

DESCRIPTION
D
q In auto active test mode, operation inspection can be performed when IPDM E/R sends a drive signal to
the following systems:

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