Nissan Qashqai J11. Manual - part 1934

PCS-8

< SYSTEM DESCRIPTION >

[IPDM E/R]

SYSTEM

RELAY CONTROL SYSTEM : Fail-safe

INFOID:0000000010508371

FAIL-SAFE CONTROL BY DTC

IPDM E/R performs fail-safe control when any DTC are detected.

Ignition relay

Ignition switch ON signal

BCM (CAN)

Each control unit, sen-
sor, actuator and relay 
(Ignition power supply) 

PCS-63

Vehicle speed signal (Meter)

Combination meter (CAN)

Push-button ignition switch 
signal

Push-button ignition switch

Cooling fan relay 1

Cooling fan speed request 
signal

ECM (CAN)

Cooling fan

ECH-31

Control relay

Input/output

Transmit unit

Control part

Reference page

DTC

CONSULT display description

Fail-safe

B121D

S/L LOCK PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply until the vehicle switches to 
sleep status.

B121A

FR FOG LAMP LH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the front fog lamp LH power 
supply circuit until the front fog lamp ON conditions are no 
longer satisfied.

B1231

DTRL RH PWR SPLY CIRC
(Daytime running light right hand power 
supply circuit)

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the daytime running light RH 
power supply circuit until the daytime running light ON 
conditions are no longer satisfied.

B1256

FR FOG LAMP RH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the front fog lamp RH power 
supply circuit until the front fog lamp ON conditions are no 
longer satisfied.

B1C00

HEIGHT SENSOR PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.

[CIRC 
SHORT TO 
BATTERY]

B1C02

RR HEIGHT SENSOR SIGNAL

[CIRC 
SHORT TO 
BATTERY]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.

[CIRC 
SHORT TO 
GROUND 
OR OPEN]

[CIRC 
VOLTAGE 
OUT OF 
RANGE]

B1C07

AIMING MOTOR DRIVE SIGNAL

[CIRC 
SHORT TO 
GRND]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.

[CIRC 
SHORT TO 
BATTERY]

[SIGNAL 
COMPARE 
FAILURE]

B1C12

RR HEIGHT SENSOR SIGNAL

[SIG 
PRTCTN 
CLCLTN IN-
CRCT]

Right and left headlamp aiming motors stop at the posi-
tion when DTC is detected.

PCS

SYSTEM

PCS-9

< SYSTEM DESCRIPTION >

[IPDM E/R]

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CAN COMMUNICATION CONTROL

B20BD

BATTERY CURRENT SENSOR

[CIRC 
SHORT TO 
BATTERY]

Inhibit stop/start system operation

[CIRC 
SHORT TO 
GRND]

[CIRC 
OPEN]

[CMPNENT 
INTERNAL 
MLFNCTN]

B20CB

DTRL LH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the daytime running light LH 
power supply circuit until the daytime running light ON 
conditions are no longer satisfied.

B20CE

HL (HI) LH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the headlamp (HI) LH power 
supply circuit until the headlamp (HI) ON conditions are 
no longer satisfied.

B20CF

HL (HI) RH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the headlamp (HI) RH pow-
er supply circuit until the headlamp (HI) ON conditions are 
no longer satisfied.

B20D0

HL (LO) LH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the headlamp (LO) LH pow-
er supply circuit until the headlamp (LO) ON conditions 
are no longer satisfied.

B20D1

HL (LO) RH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the headlamp (LO) RH pow-
er supply circuit until the headlamp (LO) ON conditions 
are no longer satisfied.

B20D2

PARKING LAMP PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the parking lamp (LH/RH) 
power supply circuit until the parking lamp, license plate 
lamp, and tail lamp ON conditions are no longer satisfied.

B20D4

TAIL LAMP LH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the following power supply 
circuits until the parking lamp, license plate lamp, and tail 
lamp ON conditions are no longer satisfied.
• Tail lamp LH (body side)
• Tail lamp LH (back door side)
• License plate lamp LH
• License plate lamp RH

B20D5

TAIL LAMP RH PWR SPLY CIRC

[CIRC 
SHORT TO 
GRND]

Shuts off the power supply to the following power supply 
circuits until the parking lamp, license plate lamp, and tail 
lamp ON conditions are no longer satisfied.
• Tail lamp RH (body side)
• Tail lamp RH (back door side)

B20DB

HEIGHT SENS INITIALIZE NOT DONE

[MISSING 
CALIBRA-
TION]

Right and left headlamp aiming motors fix at the initial 
aiming position.

[NOT CON-
FIURED]

B20E2

LED HEADLAMP RH

[CMPNENT 
INTERNAL 
MLFNCTN]

Transmits the headlamp warning signal (CAN communi-
cation) to the combination meter when the headlamp (LO) 
ON conditions are satisfied. (When the ignition switch 
turns ON, the headlamp warning is displayed on the infor-
mation display of the combination meter.)

B20E3

LED HEADLAMP LH

[CMPNENT 
INTERNAL 
MLFNCTN]

Transmits the headlamp warning signal (CAN communi-
cation) to the combination meter when the headlamp (LO) 
ON conditions are satisfied. (When the ignition switch 
turns ON, the headlamp warning is displayed on the infor-
mation display of the combination meter.)

DTC

CONSULT display description

Fail-safe

PCS-10

< SYSTEM DESCRIPTION >

[IPDM E/R]

SYSTEM

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

If No CAN Communication Is Available With BCM

IGNITION RELAY CONTROL

• IPDM E/R monitors the voltage at the contact circuit of the ignition relay inside it. 
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit.

FRONT WIPER CONTROL

When a front wiper stop position signal is in the conditions listed below, IPDM E/R performs fail-safe control.

POWER CONTROL SYSTEM

Control part

Fail-safe operation

Cooling fan

• The cooling fan is operated at HI operation when the ignition switch is turned ON.
• Turn OFF the cooling fan operation when the ignition switch is turned OFF.

A/C compressor

A/C relay OFF

Control part

Fail-safe operation

Headlamp

• Turns ON the headlamp (LO) when the ignition switch is turned ON.
• Turns OFF the headlamp (LO) when the ignition switch is turned OFF.
• Headlamp (HI): OFF

• Parking  lamp
• License plate lamp
• Illumination
• Tail lamp

• Turns ON the tail lamp, parking lamp, license plate lamp and each illumination when the ignition 

switch is turned ON.

• Turns OFF the tail lamp, parking lamp, license plate lamp and each illumination 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.

Daytime running light

Daytime running light: OFF

Front fog lamp

Front fog lamp: OFF

Ignition relay

The status just before activation of fail-safe is maintained.

Starter motor

Starter control relay: OFF

Voltage judgment

IPDM E/R judgment

Operation

Ignition relay con-

tact side

Ignition relay con-

trol condition

ON

ON

Ignition relay ON normal

—

OFF

OFF

Ignition relay OFF normal

—

ON

OFF

Ignition relay ON stuck

Detects DTC [B20DD: IGN RELAY ON CIRC]

OFF

ON

Ignition relay OFF stuck

Detects DTC [B20DE: IGN RELAY OFF CIRC]

Ignition switch

Front wiper switch

Front wiper stop position signal

Fail-safe operation

ON

Other than OFF

The front wiper stop position signal (stop 
position) cannot be input for 10 seconds.

Front wiper: 20 seconds stop

OFF

The front wiper stop position signal does 
not change for 10 seconds.

PCS

SYSTEM

PCS-11

< SYSTEM DESCRIPTION >

[IPDM E/R]

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POWER CONTROL SYSTEM : System Description

INFOID:0000000010499175

SYSTEM DIAGRAM

EACH LAMP CONTROL

IPDM E/R controls the smart FET to control each lamp according to the control signal status of each lamp
received via CAN communication. Refer to 

EXL-17, "HEADLAMP SYSTEM : System Description"

 (LED head-

lamp) or 

EXL-190, "HEADLAMP SYSTEM : System Description"

 (halogen headlamp).

COOLING FAN CONTROL

IPDM E/R controls the cooling fan according to the cooling fan control signal received from ECM via CAN
communication. Refer to

ECH-31, "COOLING FAN CONTROL : System Description"

.

SIGNAL BUFFER SYSTEM

SIGNAL BUFFER SYSTEM : System Description

INFOID:0000000010434017

SYSTEM DIAGRAM

DESCRIPTION

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

CAN communication.

• IPDM E/R receives the reverse switch signal from transmission range switch and transmits the reverse

switch signal to BCM via CAN communication.

POWER CONSUMPTION CONTROL SYSTEM

JMMIA1778GB

JMMIA1779GB