Nissan March K13. Manual - part 484

PCS-18

< ECU DIAGNOSIS INFORMATION >

[IPDM E/R (WITH I-KEY)]

IPDM E/R

23

(SB)

Ground

Horn relay control

Output

The horn is deactivated

Battery voltage

The horn is activated

0 V

24

(V)

Ground

Front wiper stop position

Input

Ignition 
switch 
ON

Front wiper stop position

0 V

Any position other than 
front wiper stop position

Battery voltage

27

(SB)

Ground

Ignition relay power sup-
ply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

30

(R)

Ground

Starter motor

Output

Ignition switch ON

0 V

At engine cranking

Battery voltage

31

(P)

Ground

Cooling fan relay power 
supply

Output

Cooling fan OFF

0 V

Cooling fan operated

Battery voltage

32

(G)

Ground

Battery power supply

Input

Ignition switch OFF

Battery voltage

33

(BR)

Ground

Fuel pump

Output

• Approximately 1 second after 

turning the ignition switch ON

• Engine running

0 - 1.5 V

Approximately 1 second or more af-
ter turning the ignition switch ON

Battery voltage

35

(G)

Ground

ECM relay power supply

Output

Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning 
ignition switch OFF)

Battery voltage

38

(L)

Ground

Headlamp LO (LH)

Output

Ignition 
switch 
ON

Lighting switch OFF

0 V

Lighting switch 2ND

Battery voltage

39

(LG)

Ground

Starter relay

Output

Ignition switch ON

0 V

At engine cranking

Battery voltage

40

(P)

Ground

Headlamp LO (RH)

Output

Ignition 
switch 
ON

Lighting switch OFF

0 V

Lighting switch 2ND

Battery voltage

42

(LG)

Ground

Oil pressure switch

Input

Ignition 
switch 
ON

Engine stopped

0 V

Engine running

Battery voltage

43

(GR)

Ground

Fuel pump relay control

Output

• Approximately 1 second after 

turning the ignition switch ON

• Engine running

0 - 1.0 V

Approximately 1 second or more af-
ter turning the ignition switch ON

Battery voltage

47

(R/W)

Ground

ECM power supply

Output

Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning 
ignition switch OFF)

Battery voltage

Terminal NO.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/

Output

+

–

PCS

IPDM E/R

PCS-19

< ECU DIAGNOSIS INFORMATION >

[IPDM E/R (WITH I-KEY)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

50

(P)

Ground

ECM relay control

Output

Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)

0 - 1.0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning 
ignition switch OFF)

Battery voltage

53

(LG)

Ground

Front wiper LO

Output

Ignition 
switch 
ON

Front wiper switch OFF

0 V

Front wiper switch LO

Battery voltage

54

(GR)

Ground

Front wiper HI

Output

Ignition 
switch 
ON

Front wiper switch OFF

0 V

Front wiper switch HI

Battery voltage

55

(B)

Ground

Ground

—

Ignition switch ON

0 V

56

(BR)

Ground

ABS actuator and electric 
unit (control unit) power 
supply

Output

Ignition switch OFF

Battery voltage

57

(R)

Ground

TCM power supply

Output

Ignition switch OFF

Battery voltage

58

(P)

Ground

Illuminations

Output

Ignition 
switch 
ON

Lighting switch OFF

0 V

Lighting switch 1ST

Battery voltage

59

(R)

Ground

Tail lamp

Output

Ignition 
switch 
ON

Lighting switch OFF

0 V

Lighting switch 1ST

Battery voltage

61

(G)

Ground

Headlamp HI (LH)

Output

Ignition 
switch 
ON

Lighting switch OFF

0 V

• Lighting switch HI
• Lighting switch PASS

Battery voltage

63

(Y)

Ground

Headlamp HI (RH)

Output

Ignition 
switch 
ON

Lighting switch OFF

0 V

• Lighting switch HI
• Lighting switch PASS

Battery voltage

64

(V)

Ground

A/C relay power supply

Output

Engine 
running

A/C switch OFF

0 V

A/C switch ON
(A/C compressor is op-
erating)

Battery voltage

65

(L/W)

Ground

Throttle control motor re-
lay power supply

Output

Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning 
ignition switch OFF)

Battery voltage

68

(G/W)

Ground

Throttle control motor re-
lay control

Output

Ignition switch ON 

→

 OFF

0 – 1.0 V 

↓

Battery voltage

↓

0 V

Ignition switch ON

0 – 1.0 V

70

(Y)

Ground

Ignition relay power sup-
ply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

71

(BR)

Ground

ECM power supply

Output

Ignition switch OFF

Battery voltage

Terminal NO.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/

Output

+

–

PCS-20

< ECU DIAGNOSIS INFORMATION >

[IPDM E/R (WITH I-KEY)]

IPDM E/R

Fail-Safe

INFOID:0000000005914123

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

72

(SB)

Ground

ECM power supply

Output

Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning 
ignition switch OFF)

Battery voltage

75

(R)

Ground

ECM relay power
supply

Output

Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning 
ignition switch OFF)

Battery voltage

76

(BR)

Ground

Transmission range 
switch

Input

Select lever in any position other 
than P or N (Ignition switch ON)

0 V

Select lever P or N (Ignition switch 
ON)

Battery voltage

80

(R)

Ground

A/T shift selector
(Detention switch)

Input

Ignition 
switch 
ON

Select lever P

0 V

Select lever in any posi-
tion other than P

Battery voltage

81

(SB)

Ground

Push-button ignition 
switch

Input

Press the push-button ignition 
switch

0 V

Release the push-button ignition 
switch

Battery voltage

82

(SB)

Ground

Steering lock relay control

Output

Steering lock is unlocked

Battery voltage

Steering lock is locked

0 V

87

(BG)

Ground

Steering lock unit
power supply

Output

Ignition 
switch 
OFF

A few seconds after 
opening the driver door

Battery voltage 

Ignition 
switch 
LOCK

Press the push-button 
ignition switch

Battery voltage 

Ignition switch ACC or ON

0 V

88

(GR)

Ground

Steering lock unit condi-
tion-1

Input

Steering lock is unlocked

Battery voltage

Steering lock is locked

0 V

89

(P)

Ground

Steering lock unit condi-
tion-2

Input

Steering lock is unlocked

0 V

Steering lock is locked

Battery voltage

90

(L)

Ground

Ignition relay power sup-
ply

Input

Ignition switch OFF or ACC

Battery voltage

Ignition switch ON

0 V

Terminal NO.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/

Output

+

–

PCS

IPDM E/R

PCS-21

< ECU DIAGNOSIS INFORMATION >

[IPDM E/R (WITH I-KEY)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

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 PROTECTION FUNCTION

IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position 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.

NOTE:

Control part

Fail-safe operation

Cooling fan

• The cooling fan relay turn ON when the ignition switch is turned ON (Cooling fan HI operation)
• The cooling fan relay turn OFF when the ignition switch is turned OFF

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 motor

• 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.

• Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control 

is activated while front wiper motor is operated and wiper stop in the other position than stop 
position.

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

Voltage judgment

IPDM E/R judgment

Operation

Ignition relay contact 

side

Ignition 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 minutes

OFF

ON

Ignition relay OFF stuck

Detects DTC “B2099: IGN RELAY OFF”

Ignition switch

Front wiper switch

Front wiper stop position signal

ON

OFF

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

ON

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