2008 NISSAN TEANA engine

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-111
< ECU DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
JCMWM1683GB

MWI-112
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
JCMWM1684GB

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-113
< ECU DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
Fail-safeINFOID:0000000003900503
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
JCMWM1685GB

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 >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
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

MWI
THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFF
MWI-119
< SYMPTOM DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
MB A
O
P
THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFF
DescriptionINFOID:0000000003792607
The oil pressure warning lamp remains illuminated while the engine is running (normal oil pressure)
Diagnosis ProcedureINFOID:0000000003792608
1.CHECK OIL PRESSURE WARNING LAMP
Perform auto active test. Refer to MWI-32, "
Diagnosis Description".
Is oil pressure warning lamp illuminated?
YES >> GO TO 2.
NO >> GO TO 5.
2.CHECK IPDM E/R OUTPUT VOLTAGE
1. Disconnect the oil pressure switch connector.
2. Turn ignition switch ON.
3. Check voltage between the oil pressure switch harness connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK OIL PRESSURE SWITCH UNIT
Perform a unit check for the oil pressure switch. Refer to MWI-50, "
Component Inspection".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-34, "Removal and Installation".
NO >> Replace oil pressure switch.
4.CHECK OIL PRESSURE SWITCH SIGNAL CIRCUIT
Check the oil pressure switch signal circuit. Refer to MWI-50, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK COMBINATION METER INPUT SIGNAL
Connect CONSULT-III and perform an input signal check for the combination meter. Refer to MWI-50, "
Com-
ponent Function Check".
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Replace BCM. Refer to BCS-78, "
Removal and Installation".
Te r m i n a l s
Voltag e
(Approx.) (+) (-)
Oil pressure switch
Ground Connector Terminal
F63 1 12 V

MWI-120
< SYMPTOM DIAGNOSIS >
THE PARKING BRAKE RELEASE WARNING CONTINUES DISPLAYING, OR
DOES NOT DISPLAY
THE PARKING BRAKE RELEASE WARNING CONTINUES DISPLAYING,
OR DOES NOT DISPLAY
DescriptionINFOID:0000000003792609
 The parking brake warning is displayed during vehicle travel even though the parking brake is released
 The parking brake warning is not displayed even though driving the vehicle with the parking brake applied
Diagnosis ProcedureINFOID:0000000003792610
1.CHECK PARKING BRAKE WARNING LAMP OPERATION
1. Start engine.
2. Check the operation of the parking brake warning lamp when operating the parking brake.
Is the inspection result normal?
YES >> Replace combination meter.
NO >> GO TO 2.
2.CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Check the parking brake switch signal circuit. Refer to MWI-52, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK PARKING BRAKE SWITCH UNIT
Perform a unit check for the parking brake switch. Refer to BRC-124, "
Component Inspection".
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Replace parking brake switch.
Condition Warning lamp status
When parking brake is applied ON
When parking brake is released OFF

PCS
PCS-1
ELECTRICAL & POWER CONTROL
C
DE
F
G H
I
J
K L
B
SECTION PCS
A
O P
N
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