Nissan Pathfinder (2008 year). Manual — part 505

PCS-8

< FUNCTION DIAGNOSIS >

[IPDM E/R]

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM

System Diagram

INFOID:0000000001712739

System Description

INFOID:0000000001712740

OUTLINE

• IPDM E/R incorporates a power consumption control function that reduces the power consumption accord-

ing to the vehicle status.

• IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN com-

munication.

Normal mode (wake-up)

- CAN communication is normally performed with other control units.
- Individual unit control by IPDM E/R is normally performed.

Low power consumption mode (sleep)

- Low power consumption control is active.
- CAN transmission is stopped.

SLEEP MODE ACTIVATION

• IPDM E/R judges that the sleep-ready conditions are fulfilled when the ignition switch is OFF and none of the

conditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communica-
tion.

- Front wiper fail-safe operation
- Outputting signals to actuators
- Switches or relays operating
- Auto active test is starting
- Emergency OFF
- Output requests are being received from control units via CAN communication.
• IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep

wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.

WAKE-UP OPERATION

• IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep

wake-up signal (wake up) from BCM or any of the following conditions is fulfilled. In addition, it transmits a
sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start.

- Ignition switch ON
- An output request is received from a control unit via CAN communication.

ALCIA0030GB

PCS

POWER CONSUMPTION CONTROL SYSTEM

PCS-9

< FUNCTION DIAGNOSIS >

[IPDM E/R]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Component Parts Location

INFOID:0000000001712741

1.

IPDM E/R E118, E119, E120, E121,
E122, E123, E124

2.

Combination meter M24

3.

BCM (view with instrument panel re-
moved) M18, M19, M20

ALMIA0311ZZ

PCS-10

< FUNCTION DIAGNOSIS >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

DIAGNOSIS SYSTEM (IPDM E/R)

Diagnosis Description

INFOID:0000000001712742

AUTO ACTIVE TEST

Description

In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation.
• Oil pressure low warning indicator
• Oil pressure gauge
• Rear window defogger
• Front wipers
• Tail, license and parking lamps
• Front fog lamps
• Headlamps (Hi, Lo)
• A/C compressor (magnetic clutch)
• Cooling fan

Operation Procedure

1.

Close the hood and front door RH, and lift the wiper arms from the windshield (to prevent windshield dam-
age due to wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield before hand.

2.

Turn ignition switch OFF.

3.

Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the
ignition switch OFF.

4.

Turn the ignition switch ON within 10 seconds. After that the horn sounds once and the auto active test
starts.

5.

After a series of the following operations is repeated 3 times, auto active test is completed.

NOTE:
When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.

CAUTION:

• If auto active test mode cannot be actuated, check door switch system. Refer to

DLK-48, "Descrip-

tion"

(with Intelligent Key system),

DLK-214, "Description"

(without Intelligent Key system).

• Do not start the engine.

Inspection in Auto Active Test Mode

When auto active test mode is actuated, the following 7 steps are repeated 3 times.

Operation
sequence

Inspection Location

Operation

1

Rear window defogger

10 seconds

2

Front wipers

LO for 5 seconds

→

HI for 5 seconds

WKIA4991E

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-11

< FUNCTION DIAGNOSIS >

[IPDM E/R]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Concept of auto active test

• IPDM E/R starts the auto active test with the door switch signals transmitted by BCM via CAN communica-

tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.

• The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.

Diagnosis chart in auto active test mode

3

Tail, license, front fog and parking lamps

10 seconds

4

Headlamps

LO for 10 seconds

→

HI on-off for 5 seconds

5

A/C compressor (magnetic clutch)

ON

⇔

OFF 5 times

6

Cooling fan

10 seconds

Operation
sequence

Inspection Location

Operation

WKIA5163E

Symptom

Inspection contents

Possible cause

Oil pressure low warning indicator does not operate

Perform auto active test.
Does the oil pressure low
warning indicator operate?

YES

• IPDM E/R signal input cir-

cuit

• ECM signal input circuit
• CAN communication signal

between ECM and combi-
nation meter

NO

• CAN communication signal

between IPDM E/R, BCM
and combination meter

Oil pressure gauge does not operate

Perform auto active test.
Does the oil pressure gauge
operate?

YES

IPDM E/R signal input circuit

NO

• CAN communication signal

between IPDM E/R, BCM
and combination meter

Rear window defogger does not operate

Perform auto active test.
Does the rear window defog-
ger operate?

YES

BCM signal input circuit

NO

• Harness or connector be-

tween A/C and AV switch
assembly and AV control
unit

• CAN communication signal

between BCM and IPDM E/
R

PCS-12

< FUNCTION DIAGNOSIS >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

CONSULT - III Function (IPDM E/R)

INFOID:0000000001712743

APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with IPDM E/R.

SELF DIAGNOSTIC

Refer to

PCS-28, "DTC Index"

.

DATA MONITOR

Monitor item

Any of the following components do not operate

• Front wipers
• Tail lamps
• License plate lamps
• Parking lamps
• Front fog lamps
• Headlamps (Hi, Lo)

Perform auto active test.
Does the applicable system
operate?

YES

BCM signal input system

NO

• Lamp or front wiper motor

malfunction

• Lamp or front wiper motor

ground circuit

• Harness or connector be-

tween IPDM E/R and appli-
cable system

• IPDM E/R (integrated relay

malfunction)

A/C compressor does not operate

Perform auto active test.
Does the A/C compressor op-
erate?

YES

• BCM signal input circuit
• CAN communication signal

between BCM and ECM

• CAN communication signal

between ECM and IPDM E/
R

NO

• Magnetic clutch malfunction
• Harness or connector be-

tween IPDM E/R and mag-
netic clutch

• IPDM E/R (integrated relay

malfunction)

Cooling fan does not operate

Perform auto active test.
Does the cooling fan operate?

YES

• ECM signal input circuit
• CAN communication signal

between ECM and IPDM E/
R

NO

• Cooling fan motor malfunc-

tion

• Harness or connector be-

tween IPDM E/R and cool-
ing fan

• IPDM E/R (integrated relay

malfunction)

Symptom

Inspection contents

Possible cause

Diagnosis mode

Description

ECU Identification

Allows confirmation of IPDM E/R part number.

Self Diagnostic Result

Displays the diagnosis results judged by IPDM E/R.

Data Monitor

Displays the real-time input/output data from IPDM E/R input/output data.

Active Test

IPDM E/R can provide a drive signal to electronic components to check their operations.

CAN Diag Support Monitor

The results of transmit/receive diagnosis of CAN communication can be read.

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-13

< FUNCTION DIAGNOSIS >

[IPDM E/R]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

ACTIVE TEST

Test item

Monitor Item

[Unit]

MAIN SIG-

NALS

Description

MOTOR FAN REQ
[1/2/3/4]

×

Displays the status of the cooling fan speed request signal received from ECM via
CAN communication.

A/C COMP REQ
[OFF/ON]

×

Displays the status of the A/C request signal received from AV control unit via
CAN communication.

TAIL&CLR REQ
[OFF/ON]

×

Displays the status of the position light request signal received from BCM via CAN
communication.

HL LO REQ
[OFF/ON]

×

Displays the status of the low beam request signal received from BCM via CAN
communication.

HL HI REQ
[OFF/ON]

×

Displays the status of the high beam request signal received from BCM via CAN
communication.

FR FOG REQ
[OFF/ON]

×

Displays the status of the front fog lamp request signal received from BCM via
CAN communication.

HL WASHER REQ
[OFF/ON]

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

FR WIP REQ
[STOP/1LOW/LOW/HI]

×

Displays the status of the front wiper request signal received from BCM via CAN
communication.

WIP AUTO STOP
[STOP P/ACT P]

×

Displays the status of the front wiper auto stop signal judged by IPDM E/R.

WIP PROT
[OFF/Block]

×

Displays the status of the front wiper fail-safe operation judged by IPDM E/R.

ST RLY REQ
[OFF/ON]

Displays the status of the starter request signal received from ECM via CAN com-
munication.

IGN RLY
[OFF/ON]

×

Displays the status of the ignition relay judged by IPDM E/R.

RR DEF REQ
[OFF/ON]

×

Displays the status of the rear defogger request signal received from AV control
unit via CAN communication.

OIL P SW
[OPEN/CLOSE]

Displays the status of the oil pressure switch judged by IPDM E/R.

DTRL REQ
[OFF]

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

HOOD SW
[OPEN/CLOSE]

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

THFT HRN REQ
[OFF/ON]

Displays the status of the theft warning horn request signal received from BCM
via CAN communication.

HORN CHIRP
[OFF/ON]

Displays the status of the horn reminder signal received from BCM via CAN com-
munication.

Test item

Operation

Description

REAR DEFOGGER

OFF

OFF

ON

Operates rear window defogger relay.

FRONT WIPER

OFF

OFF

LO

Operates the front wiper relay.

HI

Operates the front wiper relay and front wiper high relay.

HEAD LAMP WASHER

ON

—

PCS-14

< FUNCTION DIAGNOSIS >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

MOTOR FAN

1

OFF

2

OFF

3

Operates the cooling fan relay.

4

Operates the cooling fan relay.

EXTERNAL LAMPS

OFF

OFF

TAIL

Operates the tail lamp relay.

LO

Operates the headlamp low relay.

HI

Operates the headlamp low relay and ON/OFF the headlamp high relay at 1 sec-
ond intervals.

FOG

Operates the front fog lamp relay

HORN

ON

Operates horn relay for 20 ms.

Test item

Operation

Description

PCS

U1000 CAN COMM CIRCUIT

PCS-15

< COMPONENT DIAGNOSIS >

[IPDM E/R]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000001712744

Refer to

LAN-4, "System Description"

.

DTC Logic

INFOID:0000000001712745

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

Diagnosis Procedure

INFOID:0000000001712746

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 seconds or more.

2.

Check “SELF-DIAG RESULTS” of IPDM E/R.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to

LAN-5, "CAN Communication Control Circuit"

.

NO

>> Refer to

GI-51, "Intermittent Incident"

.

DTC

CONSULT-III display

description

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When IPDM E/R cannot communicate CAN
communication signal continuously for 2
seconds or more

In CAN communication system, any item (or items)
of the following listed below is malfunctioning.
• Receiving (TCM)
• Receiving (ECM)
• Receiving (BCM)
• Receiving (Combination meter)