2008 NISSAN TEANA engine

PCS-30
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
JCMWM1684GB

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-31
< ECU DIAGNOSIS >[IPDM E/R]
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P N
Fail-safeINFOID:0000000003773281
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

PCS-32
< ECU DIAGNOSIS >[IPDM E/R]
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”

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-33
< ECU DIAGNOSIS >[IPDM E/R]
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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:0000000003773282
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-34
< ON-VEHICLE REPAIR >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
ON-VEHICLE REPAIR
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
Exploded ViewINFOID:0000000003773283
Removal and InstallationINFOID:0000000003773284
CAUTION:
IPDM E/R integrated relays are not serviceable parts, and must not be removed from the unit.
REMOVAL
1. Disconnect the battery cable from the negative terminal.
2. Remove the relay box cover.
3. Disconnect the harness connector form IPDM E/R (1).
4. Press the pawls (A) and remove the IPDM E/R from relay box.
INSTALLATION
Install in the reverse order of removal.
1. Relay box cover 2. IPDM E/R
JPMIA1035ZZ
JPMIA1036ZZ

PCS-38
< FUNCTION DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
POWER DISTRIBUTION SYSTEM
FUNCTION DIAGNOSIS
POWER DISTRIBUTION SYSTEM
System DescriptionINFOID:0000000003805720
 PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the push-
button ignition switch and performs the power distribution to each power circuit. This system is used instead
of the mechanical power supply changing mechanism with the operation of the conventional key cylinder.
 The push-button ignition switch can be operated when Intelligent Key is in the following condition. Refer to
Engine Start Function for details.
- Intelligent Key is in the detection area of the inside key antenna
- Insert Intelligent Key into the key slot
- Insert key fob into the key slot
 The push-button ignition switch operation is input to BCM as a signal. BCM changes the power supply posi-
tion according to the status and operates the following relays to supply power to each power circuit.
- Ignition relay (built into IPDM E/R)
- Ignition relay (inserted into fuse block)
- ACC relay
- Blower fan relay
NOTE:
The engine switch operation changes due to the conditions of brake pedal, selector lever and vehicle speed.
 The power supply position can be confirmed with the illuminating of the indicators around the push-button
ignition switch.
BATTERY SAVER SYSTEM
When all of the following conditions are met for 60 minutes, the battery saver system will cut off the power sup-
ply to prevent battery discharge.
 The ignition switch is in the ACC position
 All doors are closed
 Selector lever is in the P position
Reset Condition of Battery Saver System
In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all
doors are closed, the selector lever is in the P position and the ignition switch is left in the ACC position for 60
minutes. If any of the following conditions are met the battery saver system is released and the steering will
change automatically to the LOCK position from the OFF position.
 Opening any door
 Operating with door key cylinder on door lock
 Operating with request switch on door lock
 Operating with Intelligent Key on door lock
Press push-button ignition switch and ignition switch will change to the ACC position from the OFF position.
STEERING LOCK OPERATION
Steering is locked by steering lock unit when ignition switch is in the OFF position, selector lever is in the P
position and any of the following conditions are met.
 Opening door
 Closing door
 Door is locked with request switch
 Door is locked with Intelligent Key
PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE
The power supply position changing operation can be performed with the following operations.
Operation Enable Condition
 When an Intelligent Key is within the detection area of inside key antenna and when it is inserted into the key
slot, the operation is as per the following.
 When starting the engine, the BCM monitors the following engine start conditions,
- Brake pedal operating condition
- Selector lever position
- Vehicle speed
 Unless each start condition is fulfilled, the engine will not respond regardless of how many times the engine
switch is pressed. At that time, illumination repeats the position in the order of LOCK→ACC→ON→OFF.

PCS
POWER DISTRIBUTION SYSTEM
PCS-39
< FUNCTION DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
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P N Operation Condition
*1: When the selector lever position is in the N position, the engine start condition is different according to the vehicle speed.
 At a vehicle speed of less than 4 km/h (2.5MPH), the engine can start only when the brake pedal is depressed.
 At a vehicle speed of 4 km/h (2.5MPH) or more, the engine can start even if the brake pedal is not depressed. (It is the same as
“Engine stall return operation while driving”.)
*2: When the selector lever position is in any position other than the P position and when the vehicle speed is 5 km/h (3.1MPH) or more,
the engine stop condition is different.
 Press and hold the push-button ignition switch for 2 seconds or more. (When the push-button ignition switch is pressed for too short a
time, the operation may be invalid, so properly press and hold to prevent an incorrect operation.)
 Press the push-button ignition switch 3 times or more within 1.5 seconds. (Emergency stop operation)Power supply positionEngine start/stop condition
Push-button ignition switch op-
eration frequency
Brake pedal Selector lever position
LOCK → ACC Not depressed Any position 1
LOCK → ACC → ON Not depressed Any position 2
LOCK → ACC → ON →
OFFNot depressed Any position 3
LOCK → START
ACC → START
ON → START
(Engine start)Depressed P or N position (*1)1
[If the switch is pressed once,
the engine starts from any pow-
er supply position (LOCK, ACC
and ON)]
Engine is running →
OFF
(Engine stop)— P position 1
Engine is running →
ACC
(Engine stop)— Any position other than P (*2) 1
Engine stall return oper-
ation while driving— N position 1

PCS-40
< FUNCTION DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
POWER DISTRIBUTION SYSTEM
Component Parts Location
INFOID:0000000003805721
Component DescriptionINFOID:0000000003805722
JMMIA0017ZZ
1. BCM M118, M119, M121, M122, M123 2. TCM F23 3. IPDM E/R E10, E11, F12
4. Push button ignition switch M101 5. Combination meter (Key warning
lamp) M346. Stop lamp switch E115
A. Behind the combination meter B. Engine room dash panel (LH) C. Behind the instrument lower panel LH
Component Reference
IPDM E/RPCS-7
Ignition relay (built into IPDM E/R)PCS-18
Ignition relay (inserted into fuse block)PCS-49
Accessory relayPCS-53
Blower relayPCS-55
Stop lamp switchSEC-50
Park/neutral position switchSEC-56
Push-button ignition switchPCS-63