Nissan Pathfinder (2012 year). Manual - part 369

EXL-68

< ECU DIAGNOSIS INFORMATION >

BCM (BODY CONTROL MODULE)

DTC Index

INFOID:0000000007827529

NOTE:

Details of time display

• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-

tion switch OFF 

→

 ON again.

• 1 - 39: Displayed if any previous malfunction is present when current condition is normal. It increases like 1

→

 2 

→

 3...38 

→

 39 after returning to the normal condition whenever ignition switch OFF 

→

 ON. The counter

remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch

OFF 

→

 ON after returning to the normal condition if the malfunction is detected again.

Priority

DTC

1

• U1000: CAN COMM CIRCUIT

2

• B2190: NATS ANTENNA AMP
• B2191: DIFFERENCE OF KEY
• B2192: ID DISCORD BCM-ECM
• B2193: CHAIN OF BCM-ECM
• B2013: STRG COMM 1
• B2552: INTELLIGENT KEY
• B2590: NATS MALFUNCTION

3

• C1729: VHCL SPEED SIG ERR
• C1735: IGNITION SIGNAL

4

• C1704: LOW PRESSURE FL
• C1705: LOW PRESSURE FR
• C1706: LOW PRESSURE RR
• C1707: LOW PRESSURE RL
• C1708: [NO DATA] FL
• C1709: [NO DATA] FR
• C1710: [NO DATA] RR
• C1711: [NO DATA] RL
• C1712: [CHECKSUM ERR] FL
• C1713: [CHECKSUM ERR] FR
• C1714: [CHECKSUM ERR] RR
• C1715: [CHECKSUM ERR] RL
• C1716: [PRESSDATA ERR] FL
• C1717: [PRESSDATA ERR] FR
• C1718: [PRESSDATA ERR] RR
• C1719: [PRESSDATA ERR] RL
• C1720: [CODE ERR] FL
• C1721: [CODE ERR] FR
• C1722: [CODE ERR] RR
• C1723: [CODE ERR] RL
• C1724: [BATT VOLT LOW] FL
• C1725: [BATT VOLT LOW] FR
• C1726: [BATT VOLT LOW] RR
• C1727: [BATT VOLT LOW] RL

CONSULT display

Fail-safe

Intelligent Key 

warning lamp ON

Low tire pressure 
warning lamp ON

Reference page

No DTC is detected.
Further testing may be required.

—

—

—

—

U1000: CAN COMM CIRCUIT

X

—

—

BCS-29

B2013: STRG COMM 1

—

—

—

SEC-30

B2190: NATS ANTENNA AMP

—

—

—

SEC-33

 (with I-Key)

SEC-132

 (without I-

Key)

B2191: DIFFERENCE OF KEY

—

—

—

SEC-36

 (with I-Key)

SEC-135

 (without I-

Key)

August 2012

2012 Pathfinder

BCM (BODY CONTROL MODULE)

EXL-69

< ECU DIAGNOSIS INFORMATION >

C

D

E

F

G

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I

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M

A

B

EXL

N

O

P

B2192: ID DISCORD BCM-ECM

—

—

—

SEC-37

 (with I-Key)

SEC-136

 (without I-

Key)

B2193: CHAIN OF BCM-ECM

—

—

—

SEC-39

 (with I-Key)

SEC-138

 (without I-

Key)

B2552: INTELLIGENT KEY

—

—

—

SEC-41

B2590: NATS MALFUNCTION

—

—

—

SEC-42

C1708: [NO DATA] FL

—

—

X

WT-14

C1709: [NO DATA] FR

—

—

X

WT-14

C1710: [NO DATA] RR

—

—

X

WT-14

C1711: [NO DATA] RL

—

—

X

WT-14

C1712: [CHECKSUM ERR] FL

—

—

X

WT-16

C1713: [CHECKSUM ERR] FR

—

—

X

WT-16

C1714: [CHECKSUM ERR] RR

—

—

X

WT-16

C1715: [CHECKSUM ERR] RL

—

—

X

WT-16

C1716: [PRESSDATA ERR] FL

—

—

X

WT-18

C1717: [PRESSDATA ERR] FR

—

—

X

WT-18

C1718: [PRESSDATA ERR] RR

—

—

X

WT-18

C1719: [PRESSDATA ERR] RL

—

—

X

WT-18

C1720: [CODE ERR] FL

—

—

X

WT-16

C1721: [CODE ERR] FR

—

—

X

WT-16

C1722: [CODE ERR] RR

—

—

X

WT-16

C1723: [CODE ERR] RL

—

—

X

WT-16

C1724: [BATT VOLT LOW] FL

—

—

X

WT-16

C1725: [BATT VOLT LOW] FR

—

—

X

WT-16

C1726: [BATT VOLT LOW] RR

—

—

X

WT-16

C1727: [BATT VOLT LOW] RL

—

—

X

WT-16

C1729: VHCL SPEED SIG ERR

—

—

X

WT-20

C1735: IGNITION SWITCH

—

—

X

WT-21

CONSULT display

Fail-safe

Intelligent Key 

warning lamp ON

Low tire pressure 
warning lamp ON

Reference page

August 2012

2012 Pathfinder

EXL-70

< ECU DIAGNOSIS INFORMATION >

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

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

Reference Value

INFOID:0000000007827533

VALUES ON THE DIAGNOSIS TOOL

Monitor Item

Condition

Value/Status

MOTOR FAN REQ

Engine idle speed

Changes depending on engine 
coolant temperature, air conditioner 
operation status, vehicle speed, 
etc.

1, 2, 3, 4

AC COMP REQ

A/C switch OFF

Off

A/C switch ON

On

TAIL&CLR REQ

Lighting switch OFF

Off

Lighting switch 1ST, 2ND, HI or AUTO (Light is illuminated)

On

HL LO REQ

Lighting switch OFF

Off

Lighting switch 2ND HI or AUTO (Light is illuminated)

On

HL HI REQ

Lighting switch OFF

Off

Lighting switch HI

On

FR FOG REQ

Lighting switch 2ND or AUTO (Light 
is illuminated)

Front fog lamp switch OFF

Off

• Front fog lamp switch ON
• Daytime light activated (Canada 

only)

On

FR WIP REQ

Ignition switch ON

Front wiper switch OFF

Stop

Front wiper switch INT

1LOW

Front wiper switch LO

Low

Front wiper switch HI

Hi

WIP AUTO STOP

Ignition switch ON

Front wiper stop position

STOP P

Any position other than front wiper 
stop position

ACT P

WIP PROT

Ignition switch ON

Front wiper operates normally

Off

Front wiper stops at fail-safe opera-
tion

BLOCK

ST RLY REQ

Ignition switch OFF or ACC

Off

Ignition switch START

On

IGN RLY

Ignition switch OFF or ACC

Off

Ignition switch ON

On

RR DEF REQ

Rear defogger switch OFF

Off

Rear defogger switch ON

On

OIL P SW

Ignition switch OFF, ACC or engine running

Open

Ignition switch ON

Close

DTRL REQ

Daytime light system requested OFF with CONSULT.

Off

Daytime light system requested ON with CONSULT.

On

THFT HRN REQ

Not operated

Off

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

TEM

On

August 2012

2012 Pathfinder

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

EXL-71

< ECU DIAGNOSIS INFORMATION >

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Terminal Layout

INFOID:0000000007827534

NOTE:

Numbers preceded by an "F" represent the fuse numbers imprinted on the IPDM E/R.  The other numbers rep-

resent the fuse numbers as they appear in the wiring diagrams.

HORN CHIRP

Not operated

Off

Door locking with keyfob or Intelligent Key (if equipped) (horn chirp mode) On

Monitor Item

Condition

Value/Status

AAMIA0386GB

August 2012

2012 Pathfinder

EXL-72

< ECU DIAGNOSIS INFORMATION >

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

Physical Values

INFOID:0000000007827535

PHYSICAL VALUES

Terminal

Wire

color

Signal name

Signal 

input/

output

Measuring condition

Reference value

(Approx.)

Igni-

tion 

switch

Operation or condition

1

W

Battery power supply

Input

OFF

—

Battery voltage

2

R

Battery power supply

Input

OFF

—

Battery voltage

3

G

ECM relay

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

4

P

ECM relay

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

6

V

Throttle control motor 
relay

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

7

BR

ECM relay control

Input

—

Ignition switch ON or START

0V

Ignition switch OFF or ACC

Battery voltage

8

W/R

Fuse 54

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

10

R/B

Fuse 45

Output

ON

Daytime light system active

0V

Daytime light system inactive

Battery voltage

11

Y

A/C compressor

Output

ON or 

START

A/C switch ON or defrost A/C 
switch

Battery voltage

A/C switch OFF or defrost A/C 
switch

0V

12

W/G

Ignition switch sup-
plied power

Input

—

OFF or ACC

0V

ON or START

Battery voltage

13

R

Fuel pump relay

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

14

W/G

Fuse 49

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

15

W/R

Fuse 50 (ABS)

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

16

W/G

Fuse 51

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

17

W/G

Fuse 55

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

19

W

Starter motor

Output

START

—

Battery voltage

20

BR

Cooling fan motor 
(low)

Output

ON or 

START

—

Battery voltage

21

GR

Ignition switch sup-
plied power

Input

—

OFF or ACC

0V

START

Battery voltage

22

G

Battery power supply

Output

OFF

—

Battery voltage

23

LG

Door mirror defogger 
output signal

Output

—

When rear defogger switch is 
ON

Battery voltage

When raker defogger switch is 
OFF

0V

August 2012

2012 Pathfinder

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

EXL-73

< ECU DIAGNOSIS INFORMATION >

C

D

E

F

G

H

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J

K

M

A

B

EXL

N

O

P

24

P

Cooling fan motor 
(high)

Output

—

Conditions correct for cooling 
fan operation

Battery voltage

Conditions not correct for 
cooling fan operation

0V

27

W

Fuse 38

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

28

R

LH front parking and 
front side marker lamp

Output

OFF

Lighting 
switch 1st po-
sition

OFF

0V

ON

Battery voltage

29

G

Trailer tow relay

Output

ON

Lighting 
switch 1st po-
sition

OFF

0V

ON

Battery voltage

30

R/B

Fuse 53

Output

—

Ignition switch ON or START

Battery voltage

Ignition switch OFF or ACC

0V

32

GR

Wiper low speed sig-
nal

Output

ON or 

START

Wiper switch

OFF

Battery voltage

LO or INT

0V

35

L

Wiper high speed sig-
nal

Output

ON or 

START

Wiper switch

OFF, LO, INT

Battery voltage

HI

0V

37

Y

Power generation 
command signal

Output

—

Ignition switch ON

6.3 V

40% is set on "Active test," 
"ALTERNATOR DUTY" of 
"ENGINE"

3.8 V

40% is set on "Active test," 
"ALTERNATOR DUTY" of 
"ENGINE"

1.4 V

38

B

Ground

Input

—

—

0V

39

L

CAN-H

—

ON

—

—

40

P

CAN-L

—

ON

—

—

42

GR

Oil pressure switch

Input

—

Engine running

Battery voltage

Engine stopped

0V

Terminal

Wire

color

Signal name

Signal 

input/

output

Measuring condition

Reference value

(Approx.)

Igni-

tion 

switch

Operation or condition

JPMIA0001GB

JPMIA0002GB

JPMIA0003GB

August 2012

2012 Pathfinder

EXL-74

< ECU DIAGNOSIS INFORMATION >

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

43

G

Wiper auto stop signal

Input

ON or 

START

Wiper switch

OFF, LO, INT

Battery voltage

44

R

Daytime light relay 
control

Input

ON

Daytime light system active

0V

Daytime light system inactive

Battery voltage

45

LG

Horn relay control

Input

ON

When door locks are operated 
using keyfob or Intelligent Key 
(if equipped) (OFF 

→

 ON)*

Battery voltage 

→

 0V

46

V

Fuel pump relay con-
trol

Input

—

Ignition switch ON or START

0V

Ignition switch OFF or ACC

Battery voltage

47

O

Throttle control motor 
relay control

Input

—

Ignition switch ON or START

0V

Ignition switch OFF or ACC

Battery voltage

48

R

Starter relay (range 
switch)

Input

ON or 

START

Selector lever in "P" or "N"

0V

Selector lever any other posi-
tion

Battery voltage

49

GR

Front RH parking and 
front side marker lamp

Output

OFF

Lighting 
switch 1st po-
sition

OFF

0V

ON

Battery voltage

50

W

Front fog lamp (LH)

Output

ON or 

START

Lighting 
switch must 
be in the 2nd 
position 
(LOW beam 
is ON) and 
the front fog 
lamp switch

OFF

0V

ON

Battery voltage

51

V

Front fog lamp (RH)

Output

ON or 

START

Lighting 
switch must 
be in the 2nd 
position 
(LOW beam 
is ON) and 
the front fog 
lamp switch

OFF

0V

ON

Battery voltage

52

P

LH low beam head-
lamp

Output

—

Lighting switch in 2nd position

Battery voltage

54

R

RH low beam head-
lamp

Output

—

Lighting switch in 2nd position

Battery voltage

55

G

LH high beam head-
lamp

Output

—

Lighting switch in 2nd position 
and placed in HIGH or PASS 
position

Battery voltage

56

L

RH high beam head-
lamp

Output

—

Lighting switch in 2nd position 
and placed in HIGH or PASS 
position

Battery voltage

57

GR

Parking, license, and 
tail lamp

Output

ON

Lighting 
switch 1st po-
sition

OFF

0V

ON

Battery voltage

59

B

Ground

Input

—

—

0V

60

GR

Rear window defog-
ger relay

Output

ON or 

START

Rear defogger switch ON

Battery voltage

Rear defogger switch OFF

0V

61

R/B

Fuse 32

Output

OFF

—

Battery voltage

Terminal

Wire

color

Signal name

Signal 

input/

output

Measuring condition

Reference value

(Approx.)

Igni-

tion 

switch

Operation or condition

August 2012

2012 Pathfinder

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

EXL-75

< ECU DIAGNOSIS INFORMATION >

C

D

E

F

G

H

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A

B

EXL

N

O

P

*: When horn reminder is ON

Fail Safe

INFOID:0000000007827536

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

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.

NOTE:

The tail lamp turns OFF when the ignition switch is turned ON.

FRONT WIPER CONTROL

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

When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper

after repeating a front wiper 10 second activation and 20 second stop five times.

NOTE:

This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item

“WIP PROT” while the wiper is stopped.

Control part

Fail-safe in operation

Cooling fan

• Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF

Control part

Fail-safe in 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
• 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

• 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.

Rear window defogger

Rear window defogger relay OFF

A/C compressor

A/C relay OFF

Front fog lamps (if equipped)

Front fog lamp relay OFF

Ignition switch

Ignition relay

Tail lamp relay

ON

ON

—

OFF

OFF

—

Ignition switch

Front wiper switch

Auto stop signal

ON

OFF

Front wiper stop position signal cannot be 
input 10 seconds.

ON

The signal does not change for 10 seconds.

August 2012

2012 Pathfinder