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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
A
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
SECTION PG B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 3 . Inspection with CONSULT-II (Self-Diagnosis) ....... 25 . F
Precautions for Supplemental Restraint System Removal and Installation of IPDM E/R .................. 26 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- REMOVAL .......................................................... 26 .
SIONER" ................................................................. 3
. INSTALLATION .................................................. 26 . G
Wiring Diagrams and Trouble Diagnosis ................. 3 . GROUND CIRCUIT .................................................. 27 .
POWER SUPPLY ROUTING CIRCUIT ..................... 4 . Ground Distribution ................................................ 27 .
Schematic ............................................................... 4
. MAIN HARNESS ................................................ 27 .
H
Wiring Diagram -- POWER -- ................................ 5 . ENGINE ROOM HARNESS ............................... 30 .
BATTERY POWER SUPPLY -- IGNITION SW. ENGINE CONTROL HARNESS ......................... 34 .
IN ANY POSITION ............................................... 5 . BODY HARNESS (LH SIDE) ............................. 35 .
ACCESSORY POWER SUPPLY -- IGNITION BODY HARNESS (RH SIDE) ............................. 36 . I
SW. IN ACC OR ON ........................................... 10 . DEFOGGER CABLE .......................................... 37 .
IGNITION POWER SUPPLY -- IGNITION SW. HARNESS ................................................................ 38
.
IN ON ..................................................................11
. Harness Layout ..................................................... 38 . J
IGNITION POWER SUPPLY -- IGNITION SW. HOW TO READ HARNESS LAYOUT ................ 38 .
IN ON AND/OR START ...................................... 12 . OUTLINE/DOUBLE CAB MODELS ................... 39 .
IPDM E/R (INTELLIGENT POWER DISTRIBUTION OUTLINE/KING CAB MODELS ......................... 40 .
PG
MODULE ENGINE ROOM) ..................................... 14 . MAIN HARNESS/LHD MODELS ........................ 41 .
System Description ............................................... 14 . MAIN HARNESS/RHD MODELS ....................... 44 .
SYSTEMS CONTROLLED BY IPDM E/R .......... 14 . ENGINE ROOM HARNESS/LHD MODELS ....... 47 .
CAN COMMUNICATION LINE CONTROL ........ 14 . ENGINE ROOM HARNESS/RHD MODELS ...... 49 . L
IPDM E/R STATUS CONTROL .......................... 15 . ENGINE CONTROL HARNESS ......................... 51 .
CAN Communication System Description ............. 15 . CHASSIS HARNESS ......................................... 53 .
Function of Detecting Ignition Relay Malfunction ... 15 BODY HARNESS (LH SIDE)/DOUBLE CAB M
CONSULT-II Function (IPDM E/R) ........................ 16 . MODELS ............................................................ 54.
CONSULT-II BASIC OPERATION ..................... 16 . BODY HARNESS (RH SIDE)/DOUBLE CAB
SELF-DIAGNOSTIC RESULTS ......................... 17 . MODELS ............................................................ 56.
DATA MONITOR ................................................ 17 . BODY HARNESS (LH SIDE)/KING CAB MOD-
CAN DIAG SUPPORT MNTR ............................ 18 . ELS ..................................................................... 58
.
ACTIVE TEST .................................................... 18 . BODY HARNESS (RH SIDE)/KING CAB MOD-
Auto Active Test .................................................... 19
. ELS ..................................................................... 60
.
DESCRIPTION ................................................... 19 . ROOM LAMP HARNESS ................................... 62 .
OPERATION PROCEDURE .............................. 19 . FRONT DOOR LH HARNESS/LHD MODELS ... 63
INSPECTION IN AUTO ACTIVE TEST MODE... 20 FRONT DOOR RH HARNESS/LHD MODELS ... 63
Schematic ............................................................. 22
. FRONT DOOR LH HARNESS/RHD MODELS ... 64
IPDM E/R Terminal Arrangement .......................... 23 . FRONT DOOR RH HARNESS/RHD MODELS... 64
Check IPDM E/R Power Supply and Ground Circuit 24 ... REAR DOOR LH HARNESS/DOUBLE CAB
MODELS ............................................................ 65.
REAR DOOR RH HARNESS/DOUBLE CAB
MODELS ............................................................ 65.
PG-1
REAR DOOR LH HARNESS/KING CAB MOD- TYPE) .................................................................76
.
ELS ..................................................................... 66
. HARNESS CONNECTOR (DIRECT-CONNECT
REAR DOOR RH HARNESS/KING CAB MOD- SRS COMPONENT TYPE) .................................77 .
ELS ..................................................................... 66
. ELECTRICAL UNITS ...............................................78 .
TAIL HARNESS .................................................. 67 . Terminal Arrangement ............................................78 .
Wiring Diagram Codes (Cell Codes) ...................... 68 . STANDARDIZED RELAY .........................................79 .
ELECTRICAL UNITS LOCATION ............................ 71 . Description .............................................................79
.
Electrical Units Location ........................................ 71 . NORMAL OPEN, NORMAL CLOSED AND
ENGINE COMPARTMENT ................................. 71 . MIXED TYPE RELAYS .......................................79 .
PASSENGER COMPARTMENT ......................... 72 . TYPE OF STANDARDIZED RELAYS .................79 .
Fuse ....................................................................... 74
. SUPER MULTIPLE JUNCTION (SMJ) .....................81 .
Fusible Link ........................................................... 74
. Terminal Arrangement ............................................81 .
Circuit Breaker (Built Into BCM) ............................ 74 . FUSE BLOCK - JUNCTION BOX (J/B) ...................83 .
HARNESS CONNECTOR ........................................ 75 . Terminal Arrangement ............................................83 .
Description ............................................................. 75
. FUSE AND FUSIBLE LINK BOX .............................84 .
HARNESS CONNECTOR (TAB-LOCKING Terminal Arrangement ............................................84 .
TYPE) ................................................................. 75
. FUSE AND RELAY BOX ..........................................85 .
HARNESS CONNECTOR (SLIDE-LOCKING Terminal Arrangement ............................................85 .
PG-2
PRECAUTIONS
PRECAUTIONS PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00N4A
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual. C
WARNING:
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer. D
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section. E
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors. F
Wiring Diagrams and Trouble Diagnosis EKS00LIU
When you read wiring diagrams, refer to the following: G
q Refer to GI-15, "How to Read Wiring Diagrams" in GI section.
q Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution.
When you perform trouble diagnosis, refer to the following: H
q Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
q Refer to GI-24, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.
I
J
PG
L
M
PG-3
POWER SUPPLY ROUTING CIRCUIT
POWER SUPPLY ROUTING CIRCUIT PFP:24110
Schematic EKS00LIV
MKWA3809E
PG-4
POWER SUPPLY ROUTING CIRCUIT
Wiring Diagram -- POWER -- EKS00LIW
BATTERY POWER SUPPLY -- IGNITION SW. IN ANY POSITION A
B
C
D
E
F
G
H
I
J
PG
L
M
MKWA3810E
PG-5
POWER SUPPLY ROUTING CIRCUIT
MKWA3811E
PG-6
POWER SUPPLY ROUTING CIRCUIT
A
B
C
D
E
F
G
H
I
J
PG
L
M
MKWA3812E
PG-7
POWER SUPPLY ROUTING CIRCUIT
MKWA3813E
PG-8
POWER SUPPLY ROUTING CIRCUIT
A
B
C
D
E
F
G
H
I
J
PG
L
M
MKWA3814E
PG-9
POWER SUPPLY ROUTING CIRCUIT
ACCESSORY POWER SUPPLY -- IGNITION SW. IN ACC OR ON
MKWA3815E
PG-10
POWER SUPPLY ROUTING CIRCUIT
IGNITION POWER SUPPLY -- IGNITION SW. IN ON
A
B
C
D
E
F
G
H
I
J
PG
L
M
MKWA3816E
PG-11
POWER SUPPLY ROUTING CIRCUIT
IGNITION POWER SUPPLY -- IGNITION SW. IN ON AND/OR START
MKWA3817E
PG-12
POWER SUPPLY ROUTING CIRCUIT
A
B
C
D
E
F
G
H
I
J
PG
L
M
MKWA3818E
PG-13
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7
System Description EKS00PA8
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 relays via IPDM E/R control cir-
cuits.
q IPDM E/R-integrated control circuits perform ON-OFF operation of relays, CAN communication control,
etc.
q It controls operation of each electrical component via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R integrated relays can be removed.
SYSTEMS CONTROLLED BY IPDM E/R
IPDM E/R receives a request signal from each Control unit with CAN communication. It controls each system.
Control system Transmit control unit Control part
q Head lamps (HI, LO)
Lamp control BCM q Tail lamps, parking and license plate lamps
q Front fog lamps
Wiper control BCM Front wipers
Rear window defogger control BCM Rear window defogger
A/C compressor control ECM A/C compressor
Starter control TCM Starter motor
Cooling fan control ECM Cooling fan
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 a maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads 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 returns to normal operation, it also returns to normal control.
q Operation of control parts by IPDM E/R during fail-safe mode is as follows:
Controlled system Fail-safe mode
q With the ignition switch ON, the headlamp low is ON.
Headlamps
q With the ignition switch OFF, the headlamp low is OFF.
q With the ignition switch ON, the tail lamp is ON.
Tail, parking and license plate lamps
q With the ignition switch OFF, the tail lamp is OFF.
q With the ignition switch ON, the cooling fan HI operates.
Cooling fan
q With the ignition switch OFF, the cooling fan stops.
Until the ignition switch is turned off, the front wiper LO and HI remains in the same status it
Front wipers
was in just before fail-safe control was initiated.
Rear window defogger Rear window defogger OFF
A/C compressor A/C compressor OFF
Front fog lamps Front fog lamp OFF
PG-14
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status by itself based on each operating condition. A
1. CAN communication status
q CAN communication is normally performed with other control units.
B
q Individual unit control by IPDM E/R is normally performed.
q A status is changed into sleep transient status when receiving a sleep request signal from BCM while
all the systems controlled by IPDM E/R under suspension.
C
2. Sleep transient status
q Process to stop CAN communication is activated.
q All systems controlled by IPDM E/R are stopped. When 3 second has elapsed after CAN communica-
D
tion with other control units is stopped, status switches to sleep status.
3. Sleep status
q IPDM E/R operates in low power mode. E
q CAN communication is stopped.
q When a change in CAN communication signal is detected, status switches to CAN communication sta-
tus. F
q When a change in ignition switch signal is detected, status switches to CAN communication status.
CAN Communication System Description EKS00PA9
G
Refer to LAN-23, "CAN COMMUNICATION" .
Function of Detecting Ignition Relay Malfunction EKS00PAA
H
q When the integrated ignition relay is stuck in a "closed contact" position and cannot be turned OFF, IPDM
E/R turns ON tail and parking lamps for 10 minutes to indicate IPDM E/R malfunction.
q When the state of the integrated ignition relay does not agree with the state of the ignition switch signal
received with CAN communication, the IPDM E/R activates the tail lamp relay. I
Ignition switch signal Ignition relay status Tail lamp relay
ON ON -- J
OFF OFF --
ON OFF --
PG
OFF ON ON (10 minutes)
NOTE:
When the ignition switch is turned ON, the tail lamps are OFF. L
M
PG-15
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
CONSULT-II Function (IPDM E/R) EKS00PAB
CONSULT-II can display each diagnostic item using the diagnostic test mode shown following.
Inspection Item, Diagnosis Mode Description
SELF-DIAG RESULTS The IPDM E/R performs diagnosis of CAN communication and self-diagnosis.
DATA MONITOR The input/output data of the IPDM E/R is displayed in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST The IPDM E/R sends a drive signal to electronic components to check their operation.
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, and then turn
ignition switch ON.
BBIA0538E
2. Touch "START (NISSAN BASED VHCL)".
BCIA0029E
3. Touch "IPDM E/R" on "SELECT SYSTEM" screen.
If "IPDM E/R" is not displayed. Refer to GI-50, "CONSULT-II
Data Link Connector (DLC) Circuit" .
BCIA0030E
PG-16
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
4. Select the desired part to be diagnosed on the "SELECT DIAG
MODE" screen. A
B
C
BCIA0031E
D
SELF-DIAGNOSTIC RESULTS
Operation Procedure
1. Touch "SELF-DIAG RESULTS" on "SELECT DIAG MODE" E
screen.
2. Check display content in self-diagnostic results.
F
G
WKIA1264E
H
Display Item List
CONSULT-II TIME
Display items Malfunction detection Possible causes I
display code CRNT PAST
NO DTC IS DETECTED.
FURTHER TESTING -- -- -- -- --
MAY BE REQUIRED. J
Any of items listed
q If CAN communication reception/transmission below have
data has a malfunction, or if any of the control errors: PG
units fail, data reception/transmission cannot be
CAN COMM CIRC U1000 X X q TRANSMIT
confirmed.
DIAG
q When the data in CAN communication is not
q ECM L
received before the specified time.
q BCM/SEC
NOTE:
The details for display of the period are as follows: M
q CRNT: Error currently detected with IPDM E/R.
q PAST: Error detected in the past and placed in IPDM E/R memory.
DATA MONITOR
Operation Procedure
1. Touch "DATA MONITOR" on "SELECT DIAG MODE" screen.
2. Touch "ALL SIGNALS", "MAIN SIGNALS" or "SELECTION FROM MENU" on the "DATA MONITOR"
screen.
ALL SIGNALS All signals will be monitored.
MAIN SIGNALS Monitors the predetermined item(s).
SELECTION FROM MENU Selects and monitors individual signal(s).
3. Touch the required monitoring item on "SELECTION FROM MENU". In "ALL SIGNALS", all items are
monitored. In "MAIN SIGNALS", predetermined items are monitored.
4. Touch "START".
PG-17
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
5. Touch "RECORD" while monitoring to record the status of the item being monitored. To stop recording,
touch "STOP".
All Signals, Main Signals, Selection From Menu
Monitor item selection
CONSULT-II
Item name Display or unit ALL MAIN SELECTION Description
screen display
SIGNALS SIGNALS FROM MENU
MOTOR FAN
Motor fan request 1/2/3/4 X X X Signal status input from ECM
REQ
A/C compressor
AC COMP REQ ON/OFF X X X Signal status input from ECM
request
Tail & clear
TAIL & CLR REQ ON/OFF X X X Signal status input from BCM
request
Headlamp LO
HL LO REQ ON/OFF X X X Signal status input from BCM
request
Headlamp HI
HL HI REQ ON/OFF X X X Signal status input from BCM
request
Front fog lamp
FR FOG REQ ON/OFF X X X Signal status input from BCM
request
Headlamp washer HL WASHER
ON/OFF X X Signal from input from BCM
request REQ
Front wiper STOP/1LOW/
FR WIP REQ X X X Signal status input from BCM
request LOW/HI
WIP AUTO
Wiper auto stop ACT P/STOP P X X X Output status of IPDM E/R
STOP
Wiper protection WIP PROT OFF/BLOCK X X X Control status of IPDM E/R
Starter request ST RLY REQ ON/OFF X X Status of input signal NOTE
Ignition relay Ignition relay status monitored
IGN RLY ON/OFF X X X
status with IPDM E/R
Rear defogger
RR DEF REQ ON/OFF X X X Signal status input from BCM
request
Oil pressure Signal status input from IPDM
OIL P SW OPEN/CLOSE X X
switch E/R
Signal status input from IPDM
Hood switch HOOD SW OFF X
E/R (function is not enabled)
Theft warning
THFT HRN REQ ON/OFF X X Signal status input from BCM
horn request
Horn chirp HORN CHIRP ON/OFF X X Output status of IPDM E/R
NOTE:
Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is in ACC position,
display may not be correct.
CAN DIAG SUPPORT MNTR
Refer to LAN-15, "CAN Diagnostic Support Monitor" .
ACTIVE TEST
Operation Procedure
1. Touch "ACTIVE TEST" on "SELECT DIAG-MODE" screen.
2. Touch item to be tested, and check operation.
3. Touch "START".
4. Touch "STOP" while testing to stop the operation.
PG-18
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Test name CONSULT-II screen display Description A
With a certain ON-OFF operation, the rear defogger relay can be oper-
Rear defogger output REAR DEFOGGER
ated.
With a certain operation (OFF, HI ON, LO ON), the front wiper relay B
Front wiper (HI, LO) output FRONT WIPER
(Lo, Hi) can be operated.
Cooling fan output MOTOR FAN With a certain operation (1, 2, 3, 4), the cooling fan can be operated.
Lamp (HI, LO, TAIL, FOG)
EXTERNAL LAMPS
With a certain operation (OFF, HI ON, LO ON, TAIL ON, FOG ON), the C
output lamp relay (Low, High, Tail, Fog) can be operated.
Horn output HORN With a certain ON-OFF operation, the horn relay can be operated.
D
Auto Active Test EKS00PAC
DESCRIPTION
q In auto active test mode, operation inspection can be performed when IPDM E/R sends a drive signal to
E
the following systems:
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