2008 NISSAN TEANA relay

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-107
< ECU DIAGNOSIS >
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(R/B)Ground ECM relay power supply OutputIgnition switch OFF
(More than a few seconds after turning
ignition switch OFF)0 V
 Ignition switch ON
 Ignition switch OFF
(For a few seconds after turning igni-
tion switch OFF)Battery voltage
51
(LG)Ground Ignition relay power supply OutputIgnition switch OFF 0 V
Ignition switch ON Battery voltage
52
(Y/G)Ground Ignition relay power supply OutputIgnition switch OFF 0 V
Ignition switch ON Battery voltage
53
(R/W)Ground ECM relay power supply OutputIgnition switch OFF
(More than a few seconds after turning
ignition switch OFF)0 V
 Ignition switch ON
 Ignition switch OFF
(For a few seconds after turning igni-
tion switch OFF)Battery voltage
54
(G/W)GroundThrottle control motor re-
lay power supplyOutputIgnition switch OFF
(More than a few seconds after turning
ignition switch OFF)0 V
 Ignition switch ON
 Ignition switch OFF
(For a few seconds after turning igni-
tion switch OFF)Battery voltage
55
(W/L)Ground ECM power supply Output Ignition switch OFF Battery voltage
56
(R/Y)Ground Ignition relay power supply OutputIgnition switch OFF 0 V
Ignition switch ON Battery voltage
57
(O)Ground Ignition relay power supply OutputIgnition switch OFF 0 V
Ignition switch ON Battery voltage
58
(Y)Ground Ignition relay power supply OutputIgnition switch OFF 0 V
Ignition switch ON Battery voltage
69
(W/B)Ground ECM relay control OutputIgnition switch OFF
(More than a few seconds after turning
ignition switch OFF)Battery voltage
 Ignition switch ON
 Ignition switch OFF
(For a few seconds after turning igni-
tion switch OFF)0 - 1.5 V
70
(O)GroundThrottle control motor re-
lay controlOutputIgnition switch ON → OFF0 -1.0 V
↓
Battery voltage
↓
0 V
Ignition switch ON 0 - 1.0 V
72
(R/B)Ground Starter relay control InputIgnition
switch ONSelector lever in any posi-
tion other than P or N0 V
Selector lever P or N Battery voltage
74
(Y)Ground Ignition relay power supply OutputIgnition switch OFF 0 V
Ignition switch ON Battery voltage Te r m i n a l N o .
(Wire color)Description
ConditionVa l u e
(Approx.)
Signal nameInput/
Output +−

MWI-108
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
75
(P/L)Ground Oil pressure switch InputIgnition
switch ONEngine stopped 0 V
Engine running Battery voltage
76
(SB)GroundPower generation com-
mand signalOutputIgnition switch ON
6.3 V
40% is set on “ACTIVE TEST”, “AL-
TERNATOR DUTY” of “ENGINE”
3.8 V
80% is set on “ACTIVE TEST”, “AL-
TERNATOR DUTY” of “ENGINE”
1.4 V
77
(GR)Ground Fuel pump relay control Output Approximately 1 second after turning
the ignition switch ON
 Engine running0 - 1.5 V
Approximately 1 second or more after
turning the ignition switch ONBattery voltage
80
(B/W)Ground Starter motor Output At engine cranking Battery voltage
83
(Y)Ground Headlamp LO (RH) OutputIgnition
switch ONLighting switch OFF 0 V
Lighting switch 2ND Battery voltage
84
(SB)Ground Headlamp LO (LH) OutputIgnition
switch ONLighting switch OFF 0 V
Lighting switch 2ND Battery voltage
86
(L)Ground Front fog lamp (RH) OutputLighting
switch
2ND Front fog lamp switch
ON
 Daytime running light
activated (Only for Can-
ada)Battery voltage
Front fog lamp switch OFF 0 V
87
(R)Ground Front fog lamp (LH) OutputLighting
switch
2ND Front fog lamp switch
ON
 Daytime running light
activated (Only for Can-
ada)Battery voltage
Front fog lamp switch OFF 0 V Te r m i n a l N o .
(Wire color)Description
ConditionVa l u e
(Approx.)
Signal nameInput/
Output +−
JPMIA0001GB
JPMIA0002GB
JPMIA0003GB

MWI-114
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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.
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 seconds activation and 20 seconds stop five times.
Control part Fail-safe operation
Cooling fan Turns ON the cooling fan relay-2 and the cooling fan relay-3 when ignition switch is
turned ON (Cooling fan operates at HI)
 Turns OFF the cooling fan relay-1, the cooling fan relay-2 and the cooling fan relay-3
when the ignition switch is turned OFF (Cooling fan does not operate)
A/C compressor A/C relay OFF
Alternator Outputs the power generation command signal (PWM signal) 0%
Control part Fail-safe 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
 Illuminations
 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.
Front fog lamps Front fog lamp relay OFF
Horn Horn OFF
Ignition relay The status just before activation of fail-safe is maintained.
Starter motor Starter control relay OFF
Steering lock unit Steering lock relay OFF
Headlamp washer relay Headlamp washer relay OFF
Voltage judgment
IPDM E/R judgment Operation
Ignition relay contact sideIgnition relay excitation coil
side
ON ON Ignition relay ON normal —
OFF OFF Ignition relay OFF normal —
ON OFF Ignition relay ON stuck Detects DTC “B2098: IGN RELAY ON”
 Turns ON the tail lamp relay for 10 min-
utes
OFF ON Ignition relay OFF stuck Detects DTC “B2099: IGN RELAY OFF”

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-115
< ECU DIAGNOSIS >
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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.
DTC IndexINFOID:0000000003900504
NOTE:
 The details of time display are as follows.
- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past.
 IGN counter is displayed on FFD (Freeze Frame data).
- The number is 0 when is detected now
- The number increases like 1 → 2 ··· 38 → 39 after returning to the normal condition whenever IGN OFF →
ON.
- The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
×: Applicable
Ignition switch Front wiper switch Front wiper auto stop signal
ONOFFThe front wiper auto stop signal (stop posi-
tion) cannot be input for 10 seconds.
ONThe front wiper auto stop signal does not
change for 10 seconds.
CONSULT display Fail-safe Refer to
No DTC is detected.
further testing
may be required.——
U1000: CAN COMM CIRCUIT×PCS-16
B2098: IGN RELAY ON×PCS-17
B2099: IGN RELAY OFF —PCS-18
B2108: STRG LCK RELAY ON —SEC-96
B2109: STRG LCK RELAY OFF —SEC-97
B210A: STRG LCK STATE SW —SEC-98
B210B: START CONT RLY ON —SEC-102
B210C: START CONT RLY OFF —SEC-103
B210D: STARTER RELAY ON —SEC-104
B210E: STARTER RELAY OFF —SEC-105
B210F: INTRLCK/PNP SW ON —SEC-107
B2110: INTRLCK/PNP SW OFF —SEC-109

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 .. .............................
4
RELAY CONTROL SYSTEM ......................... .....4
System Diagram .................................................. ......4
System Description ...................................................4
Component Parts Location ........................................6
POWER CONTROL SYSTEM .............................7
System Diagram .................................................. ......7
System Description ...................................................7
Component Parts Location ........................................7
SIGNAL BUFFER SYSTEM ................................8
System Diagram .................................................. ......8
System Description ...................................................8
Component Parts Location ........................................8
POWER CONSUMPTION CONTROL SYS-
TEM .....................................................................
9
System Diagram .................................................. ......9
System Description ...................................................9
Component Parts Location ......................................10
DIAGNOSIS SYSTEM (IPDM E/R) .....................11
Diagnosis Description ......................................... ....11
CONSULT-III Function (IPDM E/R) .........................13
COMPONENT DIAGNOSIS .........................16
U1000 CAN COMM CIRCUIT ......................... ....16
Description .......................................................... ....16
DTC Logic ...............................................................16
Diagnosis Procedure ...............................................16
B2098 IGNITION RELAY ON STUCK ...............17
Description .......................................................... ....17
DTC Logic ...............................................................17
Diagnosis Procedure ...............................................17
B2099 IGNITION RELAY OFF STUCK ..............18
Description ........................................................... ....18
DTC Logic ................................................................18
Diagnosis Procedure ...............................................18
POWER SUPPLY AND GROUND CIRCUIT ....19
Diagnosis Procedure ...............................................19
ECU DIAGNOSIS .........................................20
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
20
Reference Value .................................................. ....20
Wiring Diagram - IPDM E/R - ..................................28
Fail-safe ...................................................................31
DTC Index ...............................................................33
ON-VEHICLE REPAIR .................................34
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
34
Exploded View ..................................................... ....34
Removal and Installation .........................................34
POWER DISTRIBUTION SYSTEM
BASIC INSPECTION ....... ............................
35
DIAGNOSIS AND REPAIR WORKFLOW ........35
Work Flow ............................................................ ....35
FUNCTION DIAGNOSIS ..............................38
POWER DISTRIBUTION SYSTEM ...................38
System Description .............................................. ....38
Component Parts Location ......................................40
Component Description ..........................................40
DIAGNOSIS SYSTEM (BCM) ...........................41
COMMON ITEM ..................................................... ....41
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
41
INTELLIGENT KEY ................................................ ....42

PCS-2
INTELLIGENT KEY : CONSULT-III Function
(BCM - INTELLIGENT KEY) ...................................
42
COMPONENT DIAGNOSIS ........................46
U1000 CAN COMM CIRCUIT ............................46
BCM ...........................................................................46
BCM : Description ...................................................46
BCM : DTC Logic ....................................................46
BCM : Diagnosis Procedure ...................................46
IPDM E/R ...................................................................46
IPDM E/R : Description ...........................................46
IPDM E/R : DTC Logic ............................................46
IPDM E/R : Diagnosis Procedure ...........................46
U1010 CONTROL UNIT (CAN) .........................48
BCM ...........................................................................48
BCM : DTC Logic ....................................................48
BCM : Diagnosis Procedure ...................................48
BCM : Special Repair Requirement ........................48
B2553 IGNITION RELAY ...................................49
Description ..............................................................49
DTC Logic ...............................................................49
Diagnosis Procedure ..............................................49
B260A IGNITION RELAY ..................................51
Description ..............................................................51
DTC Logic ...............................................................51
Diagnosis Procedure ..............................................51
B2614 ACC RELAY ...........................................53
Description ..............................................................53
DTC Logic ...............................................................53
Diagnosis Procedure ..............................................53
Component Inspection ............................................54
B2615 BLOWER RELAY CIRCUIT ...................55
Description ..............................................................55
DTC Logic ...............................................................55
Diagnosis Procedure ..............................................55
Component Inspection ............................................56
B2616 IGNITION RELAY CIRCUIT ...................57
Description ..............................................................57
DTC Logic ...............................................................57
Diagnosis Procedure ..............................................57
Component Inspection ............................................58
B2618 BCM ........................................................59
Description ..............................................................59
DTC Logic ...............................................................59
Diagnosis Procedure ..............................................59
B261A PUSH-BUTTON IGNITION SWITCH .....60
Description ..............................................................60
DTC Logic ...............................................................60
Diagnosis Procedure ..............................................60
POWER SUPPLY AND GROUND CIRCUIT .....62
BCM ...........................................................................62
BCM : Diagnosis Procedure ....................................62
PUSH-BUTTON IGNITION SWITCH .................63
Description ..............................................................63
Component Function Check ..................................63
Diagnosis Procedure ...............................................63
Component Inspection ............................................64
PUSH-BUTTON IGNITION SWITCH POSI-
TION INDICATOR ..............................................
66
Description ..............................................................66
Component Function Check ..................................66
Diagnosis Procedure ...............................................66
Component Inspection ............................................67
POWER DISTRIBUTION SYSTEM ...................68
Wiring Diagram - PDS (POWER DISTRIBUTION
SYSTEM) - ..............................................................
68
ECU DIAGNOSIS .......................................73
BCM (BODY CONTROL MODULE) ..................73
Reference Value .....................................................73
Wiring Diagram - BCM - ..........................................96
Fail-safe ................................................................102
DTC Inspection Priority Chart .............................104
DTC Index ............................................................105
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
107
Reference Value ...................................................107
Wiring Diagram - IPDM E/R - ................................115
Fail-safe ................................................................118
DTC Index ............................................................120
PRECAUTION ...........................................121
PRECAUTIONS ................................................121
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................
121
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .................................
121
SYMPTOM DIAGNOSIS ...........................122
POWER DISTRIBUTION SYSTEM ..................122
Symptom Table .....................................................122
PUSH-BUTTON IGNITION SWITCH DOES
NOT OPERATE ................................................
124
Description ............................................................124
Diagnosis Procedure .............................................124
PUSH-BUTTON IGNITION SWITCH POSI-
TION INDICATOR DOES NOT ILLUMINATE ..
125
Description ............................................................125
Diagnosis Procedure .............................................125

PCS-4
< FUNCTION DIAGNOSIS >[IPDM E/R]
RELAY CONTROL SYSTEM
FUNCTION DIAGNOSIS
RELAY CONTROL SYSTEM
System DiagramINFOID:0000000003773255
System DescriptionINFOID:0000000003773256
IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input sig-
nals from various sensors and the request signals received from control units via CAN communication.
CAUTION:
IPDM E/R integrated relays cannot be removed.
JPMIA1015GB

PCS
RELAY CONTROL SYSTEM
PCS-5
< FUNCTION DIAGNOSIS >[IPDM E/R]
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NOTE:
BCM controls the starter relay.Control relay Input/output Transmit unit Control part Reference page
• Headlamp low relay
 Headlamp high relay Low beam request signal
 High beam request signalBCM (CAN) Headlamp low
 Headlamp highEXL-11
(Xenon headlamp)
EXL-200
(Halogen headlamp)
Front fog lamp relay Front fog light request signal BCM (CAN) Front fog lampEXL-17
(Xenon headlamp)
EXL-204
(Halogen headlamp)
Tail lamp relay Position light request signal BCM (CAN) Parking lamp
 Side marker lamp
 License plate lamp
Tail lampEXL-21
(Xenon headlamp)
EXL-208
(Halogen headlamp)
IlluminationsINL-12
 Front wiper relay
 Front wiper high relayFront wiper request signal BCM (CAN)
Front wiperWW-5
Front wiper auto stop signal Front wiper motor
Horn relay Theft warning horn request
signal
 Horn reminder signalBCM (CAN) Horn (low)
 Horn (high)SEC-17
 Starter relayNOTE
 Starter control relayStarter control relay signal BCM (CAN)
Starter motorSEC-104SEC-102
Steering lock unit condition
signalSteering lock unit
Starter relay control signal TCM
Steering lock relaySteering lock relay signal BCM (CAN)
Steering lock unitSEC-69
Steering lock unit condition
signalSteering lock unit
Control device (Detention
switch) signalControl device (Detention
switch)
A/C relayA/C compressor request sig-
nalECM (CAN)A/C compressor
(magnet clutch)HAC-36
(Without 7-inch dis-
play)
HAC-154
(With 7-inch display)
 Cooling fan relay-1
 Cooling fan relay-2
 Cooling fan relay-3Cooling fan speed request sig-
nalECM (CAN) Cooling fan motor-
1
 Cooling fan motor-
2EC-60
Headlamp washer relayHeadlamp washer request
signalBCM (CAN) Headlamp washerWW-10
Ignition relayIgnition switch ON signal BCM (CAN)
Ignition relay PCS-17Vehicle speed signal Combination meter (CAN)
Push-button ignition switch
signalPush-button ignition
switch