Nissan Altima L32. Manual - part 986

PCS-8

< FUNCTION DIAGNOSIS >

[IPDM E/R]

RELAY CONTROL SYSTEM

System Description

INFOID:0000000004202399

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.

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 signal

BCM (CAN)

• Headlamp low
• Headlamp High

EXL-42
EXL-40

Front fog lamp relay (if 
equipped)

Front fog light request signal BCM (CAN)

Front fog lamp

EXL-46

Tail lamp relay

Position light request signal

BCM (CAN)

• Parking  lamp
• License plate lamp
• Tail lamp
• Illuminations

EXL-51

• Front wiper relay
• Front wiper high relay

Front wiper request signal

BCM (CAN)

Front wiper

WW-20

Front wiper auto stop signal

Front wiper motor

• Starter relay

NOTE

• Starter control relay

Starter control relay signal

BCM (CAN)

Starter motor

STR-32

,

STR-6

Electronic steering column 
lock unit condition signal

Electronic steering col-
umn lock unit

Starter relay control signal

TCM (CVT model)

Clutch interlock switch 
(M/T model)

Steering lock relay

Electronic steering column 
lock relay signal

BCM (CAN)

Electronic steering 
column lock unit

STR-6

,

STR-32

Electronic steering column 
lock unit condition signal

Electronic steering col-
umn lock unit

CVT device (Detention 
switch) signal

CVT device (Detention 
switch)

A/C relay

A/C compressor request 
signal

ECM (CAN)

A/C compressor
(magnet clutch)

HAC-46

Ignition relay - 1

Ignition switch ON signal

BCM (CAN)

Ignition relay - 1

BCS-8

Vehicle speed signal

Combination meter 
(CAN)

Push-button ignition switch

Push-button ignition 
switch

Fuel pump relay

Fuel pump request signal

ECM

Fuel pump

EC-1486

 (VQ models)

EC-959

 (QR FED models)

EC-466

 (QR CAL models)

ECM relay

ECM relay control signal

ECM

ECM relay

EC-1175

 (VQ models)

EC-673

 (QR FED models)

EC-144

 (QR CAL models)

Throttle contol motor re-
lay

Throttle control motor relay 
signal

ECM

Throttle control motor 
relay

EC-1437

 (VQ models)

EC-914

 (QR FED models)

EC-417

 (QR CAL models)

Cooling fan relay - 1

Cooling fan request signal

ECM (CAN)

Cooling fan relay 1

EC-1473

 (VQ models)

EC-949

 (QR FED models)

EC-456

 (QR CAL models)

PCS

RELAY CONTROL SYSTEM

PCS-9

< FUNCTION DIAGNOSIS >

[IPDM E/R]

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Component Parts Location

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1.

IPDM E/R E16, E17, E18, E200, 
E201, F10

ALMIA0318ZZ

PCS-10

< FUNCTION DIAGNOSIS >

[IPDM E/R]

POWER CONTROL SYSTEM

POWER CONTROL SYSTEM

System Diagram

INFOID:0000000004202401

System Description

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COOLING FAN CONTROL

IPDM E/R controls cooling fans according to the status of the cooling fan speed request signal received from

ECM via CAN communication. Refer to 

LAN-7, "System Description"

.

GENERATOR CONTROL

IPDM E/R outputs power generation command signal (PWM signal) to the generator according to the status of

the power generation command value signal received from ECM via CAN communication. Refer to 

PCS-10,

"System Description"

.

ALCIA0028GB

PCS

SIGNAL BUFFER SYSTEM

PCS-11

< FUNCTION DIAGNOSIS >

[IPDM E/R]

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SIGNAL BUFFER SYSTEM

System Diagram

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System Description

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• IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM via

CAN communication. Refer to 

PCS-11, "System Description"

.

• IPDM E/R receives the rear window defogger status signal from BCM via CAN communication and transmits

it to ECM via CAN communication. Refer to 

PCS-11, "System Description"

.

ALCIA0029GB