Infiniti G37 Coupe. Manual - part 1448

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< ECU DIAGNOSIS >

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

TERMINAL LAYOUT

PHYSICAL VALUES

JSMIA0001ZZ

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/ 

Output

+

−

1

(W)

Ground

Battery power supply

Input

Ignition switch OFF

Battery voltage

2

(L)

Ground

Battery power supply

Input

Ignition switch OFF

Battery voltage

4

(V)

Ground

Front wiper LO

Output

Ignition 
switch ON

Front wiper switch OFF

0 V

Front wiper switch LO

Battery voltage

5

(L)

Ground

Front wiper HI

Output

Ignition 
switch ON

Front wiper switch OFF

0 V

Front wiper switch HI

Battery voltage

7

(R)

Ground

Tail, license plate lamps & 
illuminations

Output

Ignition 
switch ON

Lighting switch OFF

0 V

Lighting switch 1ST

Battery voltage

11

(BR)

Ground

Steering lock unit power 
supply

Output

Ignition 
switch 
OFF

A few seconds after open-
ing the driver door

Battery voltage 

Ignition 
switch 
LOCK

Press the push-button ig-
nition switch

Battery voltage 

Ignition switch ACC or ON

0 V

12

(B/W)

Ground

Ground

—

Ignition switch ON

0 V

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

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< ECU DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

WW

N

O

P

13

(Y)

Ground

Fuel pump power supply 

Output

Approximately 1 second or more after 
turning the ignition switch ON

0 V

• Approximately 1 second after turning 

the ignition switch ON

• Engine running

Battery voltage

16

(LG)

Ground

Front wiper auto stop

Input

Ignition 
switch ON

Front wiper stop position

0 V

Any position other than 
front wiper stop position

Battery voltage

19

(W)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

25

(G)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

26*

1

(R)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

27

(O)

Ground

Ignition relay monitor

Input

Ignition switch OFF or ACC

Battery voltage

Ignition switch ON

0 V

28

(L)

Ground

Push-button ignition 
switch

Input

Press the push-button ignition switch

0 V

Release the push-button ignition switch

Battery voltage

30

(GR)

Ground

Starter relay control 

Input

A/T mod-
els

A/T selector lever in any 
position other than P or N 
(Ignition switch ON)

0 V

A/T selector lever P or N 
(Ignition switch ON)

Battery voltage

M/T mod-
els

Release the clutch pedal

0 V

Depress the clutch pedal

Battery voltage

32

(V)

Ground

Steering lock unit condi-
tion-1

Input

Steering lock is activated

0 V

Steering lock is deactivated

Battery voltage

33

(P)

Ground

Steering lock unit condi-
tion-2

Input

Steering lock is activated

Battery voltage

Steering lock is deactivated

0 V

36

(G)

Ground

Battery power supply

Input

Ignition switch OFF

Battery voltage

39

(P)

—

CAN  -  L

Input/ 

Output

—

—

40

(L)

—

CAN  -  H

Input/ 

Output

—

—

41

(B/W)

Ground

Ground

—

Ignition switch ON

0 V

42

(Y)

Ground

Cooling fan relay control

Input

Ignition switch OFF or ACC

0 V

Ignition switch ON

0.7 V

43*

2

(SB)

Ground

A/T device
(Detention switch)

Input

Ignition 
switch ON

Press the A/T selector but-
ton (A/T selector lever P)

Battery voltage

• A/T selector lever in any 

position other than P

• Release the A/T selec-

tor button (A/T selector 
lever P)

0 V

44

(W)

Ground

Horn relay control

Input

The horn is deactivated

Battery voltage

The horn is activated

0 V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/ 

Output

+

−

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< ECU DIAGNOSIS >

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

45

(G)

Ground

Anti theft horn relay control

Input

The horn is deactivated

Battery voltage

The horn is activated

0 V

46

(P)

Ground

Starter relay control 

Input

A/T mod-
els

A/T selector lever in any 
position other than P or N 
(Ignition switch ON)

0 V

A/T selector lever P or N 
(Ignition switch ON)

Battery voltage

M/T mod-
els

Release the clutch pedal

0 V

Depress the clutch pedal

Battery voltage

48

(BR)

Ground

A/C relay power supply

Output

Engine 
running

A/C switch OFF

0 V

A/C switch ON
(A/C compressor is oper-
ating)

Battery voltage

49

(O)

Ground

ECM relay power supply

Output

Ignition switch OFF
(More than a few seconds after turning 
ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning igni-
tion switch OFF)

Battery voltage

51

(Y)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

53

(W)

Ground

ECM relay power supply

Output

Ignition switch OFF
(More than a few seconds after turning 
ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning igni-
tion switch OFF)

Battery voltage

54

(P)

Ground

Throttle control motor re-
lay power supply

Output

Ignition switch OFF
(More than a few seconds after turning 
ignition switch OFF)

0 V

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning igni-
tion switch OFF)

Battery voltage

55

(SB)

Ground

ECM power supply

Output

Ignition switch OFF

Battery voltage

56

(LG)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

57

(G)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

58*

2

(L)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

69

(BR)

Ground

ECM relay control

Output

Ignition switch OFF
(More than a few seconds after turning 
ignition switch OFF)

Battery voltage

• Ignition switch ON
• Ignition switch OFF

(For a few seconds after turning igni-
tion switch OFF)

0 - 1.5 V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/ 

Output

+

−

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

WW-69

< ECU DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

WW

N

O

P

70

(O)

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

73*

3

(P)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

74

(G)

Ground

Ignition relay power supply

Output

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

75

(SB)

Ground

Oil pressure switch

Input

Ignition 
switch ON

Engine stopped

0 V

Engine running

Battery voltage

76

(Y)

Ground

Power generation com-
mand signal

Output

Ignition switch ON

6.3 V

40% is set on “ACTIVE TEST”, “AL-
TERNATOR DUTY” of “ENGINE”

3.8 V

80% is set on “ACTIVE TEST”, “AL-
TERNATOR DUTY” of “ENGINE”

1.4 V

77

(R)

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 after 
turning the ignition switch ON

Battery voltage

80

(W)

Ground

Starter motor 

Output

At engine cranking

Battery voltage

83

(R)

Ground

Headlamp LO (RH)

Output

Ignition 
switch ON

Lighting switch OFF

0 V

Lighting switch 2ND

Battery voltage

84

(P)

Ground

Headlamp LO (LH)

Output

Ignition 
switch ON

Lighting switch OFF

0 V

Lighting switch 2ND

Battery voltage

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/ 

Output

+

−

JPMIA0001GB

JPMIA0002GB

JPMIA0003GB