Nissan Altima L32. Manual - part 1603

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

WW-85

< ECU DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

WW

N

O

P

IHBT RLY -REQ

Ignition switch ON

Off

At engine cranking

On

ST/INHI RLY

Ignition switch ON

Off

At engine cranking

ST 

→INHI 

The status of starter relay or starter control relay cannot be recognized by 
the battery voltage malfunction, etc. when the starter relay is ON and the 
starter control relay is OFF

UNKWN

DETENT SW

Ignition switch ON

• Press the selector button with 

CVT selector lever in P position

• CVT selector lever in any posi-

tion other than P

Off

Release the CVT selector button with CVT selector lever in P position
NOTE:
 The lever is fixed ON for M/T 

On

S/L RLY -REQ

None of the conditions below are present

Off

• Open the driver door after the ignition switch is turned OFF (for a few 

seconds)

• Press the push-button ignition switch when the steering lock is activat-

ed

• Depress the clutch pedal when the steering lock is activated

On

S/L STATE

Steering lock is activated

LOCK

Steering lock is deactivated

UNLK

[DTC B210A] is detected

UNKWN

DTRL REQ

NOTE:
This item is displayed, but cannot be monitored.

Off

OIL P SW

Ignition switch OFF, ACC or engine running

Open

Ignition switch ON

Close

THFT HRN REQ

Not operated

Off

• Panic alarm is activated
• Horn is activated with VEHICLE SECURITY (THEFT WARNING) SYS-

TEM

On

HORN CHIRP

Not operated

Off

Door locking with Intelligent Key (horn chirp mode)

On

CRNRNG LMP REQ

NOTE:
This item is displayed, but cannot be monitored.

Off

Monitor Item

Condition

Value/Status

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< ECU DIAGNOSIS >

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

TERMINAL LAYOUT

PHYSICAL VALUES

ALMIA0128ZZ

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/ 

Output

+

−

1

(R)

Ground Battery power supply

Input

Ignition switch OFF

Battery voltage

2

(L)

Ground Battery power supply

Input

Ignition switch OFF

Battery voltage

4

(L/R)

Ground Front wiper LO

Output

Ignition 
switch ON

Front wiper switch OFF

0V

Front wiper switch LO

Battery voltage

5

(L/B)

Ground Front wiper HI

Output

Ignition 
switch ON

Front wiper switch OFF

0V

Front wiper switch HI

Battery voltage

6

(SB)

Ground

Daytime light relay power 
supply (Canada models 
only)

Output

Ignition switch OFF

Battery voltage

7

(R/L)

Ground

Tail, license plate lamps & 
interior lamps

Output

Ignition 
switch ON

Lighting switch OFF

0V

Lighting switch 1ST

Battery voltage

10

(R/B)

Ground ECM relay power supply

Output

Ignition switch OFF
(For a few seconds after turning ignition 
switch OFF)

0V

• Ignition switch ON
• Ignition switch OFF

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

Battery voltage

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

WW-87

< ECU DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

WW

N

O

P

11

(P/L)

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

0V

12

(B)

Ground Ground

—

Ignition switch ON

0V

13

(W)

Ground Fuel pump power supply 

Output

Approximately 1 second or more after 
turning the ignition switch ON

0V

• Approximately 1 second after turning 

the ignition switch ON

• Engine running

Battery voltage

15

(G/W)

Ground

Ignition relay-1 power sup-
ply

Output

Ignition switch OFF

0V

Ignition switch ON

Battery voltage

16

(L/Y)

Ground Front wiper auto stop

Input

Ignition 
switch ON

Front wiper stop position

0V

Any position other than 
front wiper stop position

Battery voltage

19

(L/Y)

Ground

Ignition relay-1 power sup-
ply

Output

Ignition switch OFF

0V

Ignition switch ON

Battery voltage

20

(B/Y)

Ground Ambient sensor ground

—

Ignition switch ON

0V

21

(O/B)

Ground Ambient sensor

—

Ignition switch ON

5V

22

(W/R)

Ground

Refrigerant pressure sen-
sor ground

—

Ignition switch ON

0V

23

(B/R)

Ground

Refrigerant pressure sen-
sor

—

• Ignition switch ON (READY)
• Both A/C switch and blower motor 

switch ON (electric compressor oper-
ates)

1.0 - 4.0V

24

(BR/W)

Ground

Refrigerant pressure sen-
sor power supply

—

Ignition switch ON

5V

25

(GR)

Ground

Ignition relay-1 power sup-
ply

Output

Ignition switch OFF

0V

Ignition switch ON

Battery voltage

27

(BR/W)

Ground Ignition relay monitor

Input

Ignition switch OFF or ACC

Battery voltage

Ignition switch ON

0V

28

(BR)

Ground

Push-button ignition 
switch

Input

Press the push-button ignition switch

0V

Release the push-button ignition switch

Battery voltage

30

(R/B)

Ground Starter relay control 

Input

CVT mod-
els

CVT selector lever in any 
position other than P or N 
(ignition switch ON)

0V

CVT selector lever P or N 
(ignition switch ON)

Battery voltage

M/T mod-
els

Release the clutch pedal

0V

Depress the clutch pedal

Battery voltage

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)

32

(L/O)

Ground

Electronic steering column 
lock unit condition-1

Input

Electronic steering column lock is acti-
vated

0V

Electronic steering column lock is deac-
tivated

Battery voltage

33

(G/R)

Ground

Electronic steering column 
lock unit condition-2

Input

Electronic steering column lock is acti-
vated

Battery voltage

Electronic steering column lock is deac-
tivated

0V

34

(O/L)

Ground Cooling fan relay-3 control

Input

Ignition switch OFF or ACC

0V

Ignition switch ON

0.7V

35

(L/B)

Ground Cooling fan motor control

Output

Ignition switch OFF or ACC

0V

Ignition switch ON

0.7V

36

(G)

Ground Battery power supply

Input

Ignition switch OFF

Battery voltage

38

(R/W)

Ground Cooling fan motor control

Output

Ignition switch OFF or ACC

0V

Ignition switch ON

0.7V

39

(P)

—

CAN  -  L

Input/ 

Output

—

—

40

(L)

—

CAN  -  H

Input/ 

Output

—

—

41

(B)

Ground Ground

—

Ignition switch ON

0V

42

(SB)

Ground Cooling fan relay-2 control

Input

Ignition switch OFF or ACC

0V

Ignition switch ON

0.7V

43

(G/B)

Ground

CVT device
(Detention switch)

Input

Ignition 
switch ON

Press the CVT selector 
button (CVT selector lever 
P)

Battery voltage

• CVT selector lever in 

any position other than 
P

• Release the CVT selec-

tor button (CVT selector 
lever P)

0V

44

(G/W)

Ground Horn relay control

Input

The horn is deactivated

Battery voltage

The horn is activated

0V

45

(L/O)

Ground Anti theft horn relay control

Input

The horn is deactivated

Battery voltage

The horn is activated

0V

46

(R)

Ground Starter relay control 

Input

CVT mod-
els

CVT selector lever in any 
position other than P or N 
(ignition switch ON)

0V

CVT selector lever P or N 
(ignition switch ON)

Battery voltage

M/T mod-
els

Release the clutch pedal

0V

Depress the clutch pedal

Battery voltage

48

(Y/R)

Ground A/C relay power supply

Output

Engine 
running

A/C switch OFF

0V

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

Battery voltage

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

Signal name

Input/ 

Output

+

−