2007 NISSAN TIIDA Engine Control

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-85
< ECU DIAGNOSIS >
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MB A
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P If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
 IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
 IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
 If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to
alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop position by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan Turns ON the cooling fan relay when the ignition switch is turned ON
 Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part Fail-safe in operation
Headlamp Turns ON the headlamp low relay when the ignition switch is turned ON
 Turns OFF the headlamp low relay when the ignition switch is turned OFF
 Headlamp high relay OFF
Parking lamps
 License plate lamps
 Tail lamps Turns ON the tail lamp relay when the ignition switch is turned ON
 Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
 The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-
safe control is activated while the front wiper is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relay Tail lamp relay
ON ON —
OFF OFF —
Ignition switch Front wiper switch Auto stop signal
ONOFFFront wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.

PCS
PCS-1
ELECTRICAL & POWER CONTROL
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SECTION PCS
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CONTENTS
POWER CONTROL SYSTEM
IPDM E/R
FUNCTION DIAGNOSIS ...............................
3
RELAY CONTROL SYSTEM ..............................3
System Diagram ........................................................3
System Description ...................................................4
Component Parts Location ........................................5
POWER CONTROL SYSTEM .............................6
System Diagram ........................................................6
System Description ...................................................6
SIGNAL BUFFER SYSTEM ................................7
System Diagram ........................................................7
System Description ...................................................7
POWER CONSUMPTION CONTROL SYS-
TEM .....................................................................
8
System Diagram ........................................................8
System Description ...................................................8
Component Parts Location ........................................9
DIAGNOSIS SYSTEM (IPDM E/R) .....................10
Diagnosis Description .............................................10
CONSULT - III Function (IPDM E/R) .......................13
COMPONENT DIAGNOSIS .........................15
U1000 CAN COMM CIRCUIT .............................15
Description ..............................................................15
DTC Logic ...............................................................15
Diagnosis Procedure ...............................................15
POWER SUPPLY AND GROUND CIRCUIT ......16
Diagnosis Procedure ...............................................16
ECU DIAGNOSIS .........................................17
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
17
Reference Value .....................................................17
Terminal Layout ......................................................19
Physical Values .......................................................19
Wiring Diagram ........................................................23
Fail Safe ..................................................................26
DTC Index ...............................................................28
PRECAUTION ..............................................29
PRECAUTIONS .................................................29
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
29
REMOVAL AND INSTALLATION ...............30
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
30
Removal and Installation of IPDM E/R ....................30
POWER DISTRIBUTION SYSTEM
BASIC INSPECTION ...................................
31
DIAGNOSIS AND REPAIR WORKFLOW ........31
Work Flow ................................................................31
FUNCTION DIAGNOSIS ..............................34
POWER DISTRIBUTION SYSTEM ...................34
System Description ..................................................34
Component Parts Location ......................................34
Component Description ..........................................34
DIAGNOSIS SYSTEM (BCM) ...........................35
COMMON ITEM .........................................................35
COMMON ITEM : Diagnosis Description ................35
COMMON ITEM : CONSULT-III Function ...............35
INTELLIGENT KEY ....................................................35
INTELLIGENT KEY : CONSULT-III Function
(BCM - INTELLIGENT KEY) ....................................
35
COMPONENT DIAGNOSIS .........................36

PCS-2
U1000 CAN COMM CIRCUIT ............................36
Description ..............................................................36
DTC Logic ...............................................................36
Diagnosis Procedure ..............................................36
POWER SUPPLY AND GROUND CIRCUIT .....37
BCM ...........................................................................37
BCM : Diagnosis Procedure ...................................37
BCM : Special Repair Requirement ........................37
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) .............................
37
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) : Diagnosis Pro-
cedure .....................................................................
37
ECU DIAGNOSIS ........................................38
BCM (BODY CONTROL MODULE) ..................38
Reference Value .....................................................38
Terminal Layout ......................................................38
Physical Values ......................................................38
Wiring Diagram .......................................................38
DTC Inspection Priority Chart ...............................38
DTC Index ..............................................................38
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) .................
39
Reference Value .....................................................39
Terminal Layout ......................................................39
Physical Values .......................................................39
Wiring Diagram .......................................................39
Fail Safe .................................................................39
DTC Index ..............................................................39
ON-VEHICLE MAINTENANCE ..................40
PRE-INSPECTION FOR DIAGNOSTIC ............40
Basic Inspection ......................................................40
ON-VEHICLE REPAIR ...............................41
BCM (BODY CONTROL MODULE) ..................41
Removal and Installation .........................................41

PCS-20
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
1 R Battery power supply Input OFF — Battery voltage
2 G Battery power supply Input OFF — Battery voltage
3 Y ECM Relay Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
4 G ECM relay Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
6GRDaytime light relay
controlInput ON Daytime light system active. Less than battery voltage
Daytime light system inactive. Battery voltage
7 G ECM relay control Input —Ignition switch ON or START 0V
Ignition switch OFF or ACC Battery voltage
8GThrottle control motor
relayOutput —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
11 W A/C compressor OutputON or
STARTA/C switch ON or defrost A/C
switchBattery voltage
A/C switch OFF or defrost A/C
switch0V
12 OIgnition switch sup-
plied powerInput —OFF or ACC 0V
ON or START Battery voltage
14BR
(M/T)
R
(A/T)Fuse 49 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
15 V Fuse 50 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
16 SB Fuse 51 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
19 R Starter motor Output START — Battery voltage
20L
(with
A/C)
LG
(with-
out A/
C)Cooling fan relay-1 Output —Conditions correct for cooling
fan low operation.Battery voltage
Conditions not correct for
cooling fan low operation.0V
21 WIgnition switch START
signalInput START — Battery voltage
22 G Battery power supply Input — — Battery voltage
23 L Cooling fan relay-2 Input —Conditions correct for cooling
fan high operationBattery voltage
Conditions not correct for
cooling fan high operation0V
24 Y Cooling fan relay-3 Output —Conditions correct for cooling
fan high operationBattery voltage
Conditions not correct for
cooling fan high operation0V
27 BR
Tail lamp relay (park-
ing lamps)Output — Lighting switch in 2nd position Battery voltage

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-21
< ECU DIAGNOSIS >[IPDM E/R]
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29 PTail lamp relay (park-
ing lamps)Output — Lighting switch in 2nd position Battery voltage
30 R Fuse 54 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
31 O Fuse 55 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
32 LWiper high speed sig-
nalOutputON or
STARTWiper switchOFF, LO, INT 0V
HI Battery voltage
33 YWiper low speed sig-
nalOutputON or
STARTWiper switchOFF 0V
LO or INT Battery voltage
35 BRStarter relay (inhibit
switch)InputON or
STARTSelector lever in "P" or "N"
(CVT or A/T) or clutch pedal
depressed (M/T)Battery voltage
Selector lever any other posi-
tion (CVT or A/T) or clutch
pedal released (M/T)0V
36 BR Fuel pump relay Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
37 G Oil pressure switch InputON or
STARTEngine running and oil pres-
sure within specificationBattery voltage
Engine not running or oil pres-
sure below specification0V
38 R Wiper auto stop signal InputON or
STARTWipers not in park position Battery voltage
Wipers in park position 0V
39 B Ground Input — — 0V
40 P CAN-L — ON — —
41 L CAN-H — ON — —
46 YThrottle control motor
relay controlInput —Ignition switch ON or START 0V
Ignition switch OFF or ACC Battery voltage
47 GRFuel pump relay con-
trolInput —Ignition switch ON or START 0V
Ignition switch OFF or ACC Battery voltage
50 V Front fog lamp (LH)Output ON or
STARTLighting
switch must
be in the 2ND
position
(LOW beam
is ON) and
the front fog
lamp switchOFF 0V
ON Battery voltage
51 W Front fog lamp (RH) OutputON or
STARTLighting
switch must
be in the 2ND
position
(LOW beam
is ON) and
the front fog
lamp switchOFF 0V
ON Battery voltage
52 LLH Low beam head-
lampOutput — Lighting switch in 2nd position Battery voltage Te r m i n a lWire
colorSignal name
Signal
input/
outputMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition

PCS-26
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Fail Safe
INFOID:0000000001697599
CAN COMMUNICATION CONTROL
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.
If No CAN Communication Is Available With ECM
ALMIA0252GB

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-27
< ECU DIAGNOSIS >[IPDM E/R]
C
D
E
F
G
H
I
J
K
L B A
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P N If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
 IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
 IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
 If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to
alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop position by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan Turns ON the cooling fan relay when the ignition switch is turned ON
 Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part Fail-safe in operation
Headlamp Turns ON the headlamp low relay when the ignition switch is turned ON
 Turns OFF the headlamp low relay when the ignition switch is turned OFF
 Headlamp high relay OFF
Parking lamps
 License plate lamps
 Tail lamps Turns ON the tail lamp relay when the ignition switch is turned ON
 Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
 The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-
safe control is activated while the front wiper is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relay Tail lamp relay
ON ON —
OFF OFF —
Ignition switch Front wiper switch Auto stop signal
ONOFFFront wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.

PCS
POWER SUPPLY AND GROUND CIRCUIT
PCS-37
< COMPONENT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
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POWER SUPPLY AND GROUND CIRCUIT
BCM
BCM : Diagnosis ProcedureINFOID:0000000001697613
Refer to BCS-30, "Diagnosis Procedure".
BCM : Special Repair RequirementINFOID:0000000001697614
1.REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to CONSULT-III Operation Manual.
>> Work end.
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) : Di-
agnosis Procedure
INFOID:0000000001697615
Refer to PCS-16, "Diagnosis Procedure".