2007 NISSAN 350Z engine

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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
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Revision: 2006 November2007 350Z
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
PRECAUTIONS .......................................................... 3
Precautions for Battery Service ................................ 3
POWER SUPPLY ROUTING CIRCUIT ...................... 4
Schematic ................................................................ 4
Wiring Diagram — POWER — ................................. 5
BATTERY POWER SUPPLY — IGNITION SW.
IN ANY POSITION ................................................ 5
ACCESSORY POWER SUPPLY — IGNITION
SW. IN “ACC” OR “ON” ....................................... 10
IGNITION POWER SUPPLY — IGNITION SW.
IN “ON” AND/OR “START” ................................... 11
Fuse ....................................................................... 15
Fusible Link ............................................................ 15
Circuit Breaker ....................................................... 15
IPDM E/R (INTELLIGENT POWER DISTRIBUTION
MODULE ENGINE ROOM) ...................................... 16
System Description ................................................ 16
SYSTEMS CONTROLLED BY IPDM E/R ........... 16
CAN COMMUNICATION LINE CONTROL ......... 16
IPDM E/R STATUS CONTROL ........................... 17
CAN Communication System Description .............. 17
CAN Communication Unit ...................................... 17
Function of Detecting Ignition Relay Malfunction ... 17
CONSULT-III Function (IPDM E/R) ........................ 18
SELF-DIAG RESULTS ........................................ 18
DATA MONITOR ................................................. 18
ACTIVE TEST ..................................................... 19
Auto Active Test ..................................................... 20
DESCRIPTION .................................................... 20
OPERATION PROCEDURE ............................... 20
INSPECTION IN AUTO ACTIVE TEST MODE ... 20
Schematic .............................................................. 22
IPDM E/R Terminal Arrangement ........................... 23
IPDM E/R Power/Ground Circuit Inspection .......... 24
Inspection With CONSULT-III (Self-Diagnosis) ...... 25
Removal and Installation of IPDM E/R ................... 26
REMOVAL ........................................................... 26
INSTALLATION ................................................... 26GROUND ................................................................... 27
Ground Distribution ................................................. 27
MAIN HARNESS ................................................. 27
ENGINE ROOM HARNESS ................................ 29
ENGINE CONTROL HARNESS .......................... 32
BODY HARNESS ................................................ 34
BODY NO. 2 HARNESS ..................................... 37
TAIL HARNESS ................................................... 38
BACK DOOR HARNESS .................................... 40
HARNESS ................................................................. 41
Harness Layout ...................................................... 41
HOW TO READ HARNESS LAYOUT ................. 41
OUTLINE ............................................................. 42
MAIN HARNESS ................................................. 43
ENGINE ROOM HARNESS ................................ 46
ENGINE CONTROL HARNESS .......................... 50
BODY HARNESS ................................................ 53
BODY NO. 2 HARNESS ..................................... 58
TAIL HARNESS ................................................... 59
TAIL NO. 2 HARNESS ........................................ 62
ROOM LAMP HARNESS .................................... 63
DOOR HARNESS ............................................... 65
Wiring Diagram Codes (Cell Codes) ...................... 67
ELECTRICAL UNITS LOCATION ............................ 70
Electrical Units Location ......................................... 70
ENGINE COMPARTMENT .................................. 70
PASSENGER COMPARTMENT ......................... 71
LUGGAGE COMPARTMENT .............................. 74
HARNESS CONNECTOR ......................................... 76
Description .............................................................. 76
HARNESS CONNECTOR (TAB-LOCKING
TYPE) .................................................................. 76
HARNESS CONNECTOR (SLIDE-LOCKING
TYPE) .................................................................. 77
HARNESS CONNECTOR (LEVER LOCKING
TYPE) .................................................................. 78
ELECTRICAL UNITS ................................................ 79
Terminal Arrangement ............................................ 79
SMJ (SUPER MULTIPLE JUNCTION) ..................... 81
Terminal Arrangement ............................................ 81

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2006 November2007 350Z
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7
System DescriptionNKS000E4

IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates relays and fuse blocks which
were originally placed in engine room. It controls integrated relays via IPDM E/R control circuit.

IPDM E/R integrated control unit performs ON-OFF operation of relay, hood switch signal reception, etc.

It controls operation of each electrical part 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.
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 reads necessary information only.
1. Fail-safe control

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.

Operation of control parts by IPDM E/R during fail-safe mode is as follows:
Control system Transmit control unit Control part
Lamp control BCM

Head lamps (HI, LO)

Parking lamps, license plate lamps and tail lamps
Wiper control BCM Front wipers
Rear window defogger control BCM Rear window defogger
A/C compressor control ECM A/C compressor (magnet clutch)
Cooling fan control ECM Cooling fan
Controlled system Fail-safe mode
Headlamp

With the ignition switch ON, the headlamp (low) is ON.

With the ignition switch OFF, the headlamp (low) is OFF.
Parking, license plate and tail lamps

With the ignition switch ON, the parking, license plate and tail lamps are ON.

With the ignition switch OFF, the parking, license plate and tail lamps are OFF.
Cooling fan

With the ignition switch ON, the cooling fan HI operates.

With the ignition switch OFF, the cooling fan stops.
Front wiperUntil the ignition switch is turned OFF, the front wiper LO and HI remains in the same status
it was in just before fail−safe control was initiated.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C compressor OFF

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

CAN communication is normally performed with other control units.

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

When sleep request signal is received from BCM, mode is switched to sleep waiting status.
2. Sleep waiting status

Process to stop CAN communication is activated.

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.
3. Sleep status

IPDM E/R operates in low power mode.

CAN communication is stopped.

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

When a change in hood switch or ignition switch signal is detected, mode switches to CAN communica-
tion status.
CAN Communication System DescriptionNKS000E5
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. Modern
vehicles are equipped with many electronic control units and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected 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.
CAN Communication UnitNKS000E6
Refer to LAN-48, "CAN System Specification Chart" .
Function of Detecting Ignition Relay MalfunctionNKS000E7

When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON
parking lamp, license plate lamp and tail lamp for 10 minutes to indicate ignition relay malfunction.

When a state of ignition relay having built-in does not agree with a state of Ignition switch signal input by a
CAN communication from BCM, IPDM E/R lets tail lamp relay operate.
NOTE:

When the ignition switch is turned ON, tail lamp relay and daytime light relay are OFF.

*1: Canada model onlyIgnition switch signal Ignition relay status
Tail lamp relay and daytime light relay
*1
ON ON —
OFF OFF —
ON OFF —
OFF ON ON (10 minutes)

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2006 November2007 350Z
CONSULT-III Function (IPDM E/R)NKS000E8
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
SELF-DIAG RESULTS
Display Item List
NOTE:
The details for display of the period are as follows:

CRNT: Error currently detected with IPDM E/R.

PAST: Error detected in the past and memorized with IPDM E/R.
DATA MONITOR
All Items, Main Items, Selection From Menu
Inspection Item, Diagnosis Mode Description
SELF-DIAG RESULTS The IPDM E/R performs diagnosis of the 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.
Display ItemsCONSULT-III
display codeMalfunction detecting conditionTIME
Possible causes
CRNT PAST
NO DTC IS
DETECTED.FURTHER
TESTING MAY BE
REQUIRED.-----
CAN COMM CIRC U1000

If CAN communication reception/transmis-
sion data has a malfunction, or if any of the
control units malfunction, data reception/
transmission cannot be confirmed.

When the data in CAN communication is not
received before the specified time××Any of or several items
below have errors.

TRANSMIT DIAG

ECM

BCM
Item nameCONSULT-III screen
displayDisplay or unitSELECT MONITOR ITEM
Description ALL
SIG-
NALSMAIN
SIG-
NALSSELEC-
TION
FROM
MENU
Motor fan request MOTOR FAN REQ 1/2/3/4×× ×Signal status input from ECM
Compressor request AC COMP REQ ON/OFF×× ×Signal status input from ECM
Parking request TAIL&CLR REQ ON/OFF×× ×Signal status input from BCM
H/L LO request HL LO REQ ON/OFF×× ×Signal status input from BCM
H/L HI request HL HI REQ ON/OFF×× ×Signal status input from BCM
Front fog request
FR FOG REQ
*1ON/OFF×× ×—
Head lamp washer
requestHL WASHER REQ
*1ON/OFF××—
Front wiper request FR WIP REQSTOP/1LOW/
LOW/HI×× ×Signal status input from BCM
Wiper auto stop WIP AUTO STOP ACT P/STOP P×× ×Output status of IPDM E/R
Wiper protection WIP PROT OFF/Block×× ×Control status of IPDM E/R
Starter request
ST RLY REQ
*2ON/OFF××Status of input signal
Ignition relay status IGN RLY ON/OFF×× ×Ignition relay status monitored
with IPDM E/R
Rear window defogger
requestRR DEF REQ ON/OFF×× ×Signal status input from BCM

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NOTE:

Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is at ACC, the display may not be cor-
rect.

*1: This items is displayed, but does not function.

*2: The vehicle without intelligent key system displays only ON without change.

*3: Only the vehicle with daytime light system operates.
ACTIVE TEST
Display Item List
NOTE:
1. Headlamp washer item is displayed, but it cannot be tested.
2. Fog lamp item is displayed, but it cannot be tested. Oil pressure switch
OIL P SW
*1OPEN/CLOSE××—
Day time light request
DTRL REQ
*3ON/OFF××Signal status input from BCM
Hood switch
HOOD SW
*1ON/OFF××—
Theft warning horn
requestTHFT HRN REQ ON/OFF××Signal status input from BCM
Horn chirp HORN CHIRP ON/OFF××Output status of IPDM E/R Item nameCONSULT-III screen
displayDisplay or unitSELECT MONITOR ITEM
Description ALL
SIG-
NALSMAIN
SIG-
NALSSELEC-
TION
FROM
MENU
Test item CONSULT-III screen display Description
Tail lamp operation TAIL LAMPWith a certain ON-OFF operation, the tail lamp relay can be oper-
ated.
Rear window defogger opera-
tionREAR DEFOGGERWith a certain ON-OFF operation, the rear window defogger relay
can be operated.
Front wiper (HI, LO) operation FRONT WIPERWith a certain operation (OFF, HI ON, LO ON), the front wiper relay
(Lo, Hi) can be operated.
Cooling fan operation MOTOR FAN With a certain operation (1,2,3,4), the cooling fan can be operated.
Headlamp washer
NOTE 1HEAD LAMP WASHER —
Lamp (HI, LO, FOG
NOTE 2 )
operationLAMPSWith a certain operation (OFF, HI ON, LO ON, FOG ON NOTE ), the
lamp relay (Lo, Hi, Fog NOTE ) can be operated.
Horn operation HORN Push “ON” button, horn relay operates 20 ms.

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2006 November2007 350Z
Auto Active TestNKS000E9
DESCRIPTION
In auto active test mode, operation inspection can be performed when IPDM E/R sends a drive signal to the
following systems:

Rear window defogger

Front wipers

Parking lamp, license plate lamp and tail lamp

Headlamps (Hi, Lo)

A/C compressor (magnetic clutch)

Cooling fan
OPERATION PROCEDURE
1. Close hood and front door (passenger side), and then lift wiper arms away from windshield (to prevent
glass damage by wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.
2. Turn ignition switch OFF.
3. Turn ignition switch ON, and, within 20 seconds, press driver's front door switch 10 times (close other
door). Then turn ignition switch OFF.
4. Turn ignition switch ON within 10 seconds after ignition switch OFF.
5. When auto active test mode is actuated, horn chirps once. Oil pressure warning lamp starts blinking.
6. After a series of operations is repeated three times, auto active test is completed.
NOTE:
When auto active test mode has to be cancelled halfway, turn ignition switch OFF.
CAUTION:
Be sure to inspect BL-38, "
Check Door Switch" when the auto active test cannot be performed.
INSPECTION IN AUTO ACTIVE TEST MODE
When auto active test mode is actuated, the following eight steps are repeated three times.
NOTE:
It takes 10 seconds from 3 to 4.
PKIB6170E

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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Concept of Auto Active Test

IPDM E/R actuates auto active test mode when it receives door switch signal from BCM via CAN commu-
nication line. Therefore, when auto active test mode is activated successfully, CAN communication
between IPDM E/R and BCM is normal.

If any of systems controlled by IPDM E/R cannot be operated, possible cause can be easily diagnosed
using auto active test.
Diagnosis chart in auto active test mode
Symptom Inspection contents Possible cause
Rear window defogger
does not operate.Perform auto active
test. Does rear win-
dow defogger oper-
ate?YES

BCM signal input circuit
NO

Rear window defogger relay circuit

Open circuit of rear window defogger

IPDM E/R malfunction
Any of front wipers, tail
and parking lamps,
front fog lamps, and
head lamps (Hi, Lo) do
not operate.Perform auto active
test. Does system in
question operate?YES

BCM signal input system
NO

Lamp/wiper motor malfunction

Lamp/wiper motor ground circuit malfunction

Harness/connector malfunction between IPDM E/R and system in question

IPDM E/R (integrated relay) malfunction
A/C compressor does
not operate.Perform auto active
test. Does magnetic
clutch operate?YES

BCM signal input circuit

CAN communication signal between BCM and ECM.

CAN communication signal between ECM and IPDM E/R
NO

Magnetic clutch malfunction

Harness/connector malfunction between IPDM E/R and magnetic clutch

IPDM E/R (integrated relay) malfunction
Cooling fan does not
operate.Perform auto active
test. Does cooling
fan operate?YES

ECM signal input circuit

CAN communication signal between ECM and IPDM E/R
NO

Cooling fan motor malfunction

Harness/connector malfunction between IPDM E/R and cooling fan motor

IPDM E/R (integrated relay) malfunction

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2006 November2007 350Z
SchematicNKS0054B
TKWT5823E