Nissan March K13. Manual - part 488

PCS-34

< SYSTEM DESCRIPTION >

[IPDM E/R (WITHOUT I-KEY)]

SYSTEM

IPDM E/R outputs power generation command signal (PWM signal) to the alternator according to the status of
the power generation command value signal received from ECM via CAN communication. Refer to 

CHG-8,

"POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : System Diagram"

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SIGNAL BUFFER SYSTEM

SIGNAL BUFFER SYSTEM : System Diagram

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SIGNAL BUFFER SYSTEM : System Description

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IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM via
CAN communication. Refer to 

MWI-10, "OIL PRESSURE WARNING LAMP : System Diagram"

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POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM : System Diagram

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POWER CONSUMPTION CONTROL SYSTEM : System Description

INFOID:0000000005914146

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

JMMIA0402GB

JPMIA0731GB

PCS

SYSTEM

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< SYSTEM DESCRIPTION >

[IPDM E/R (WITHOUT I-KEY)]

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• 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.

- Outputting signals to actuators
- Switches or relays operating
- 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.

PCS-36

< SYSTEM DESCRIPTION >

[IPDM E/R (WITHOUT I-KEY)]

DIAGNOSIS SYSTEM (IPDM E/R)

DIAGNOSIS SYSTEM (IPDM E/R)

Diagnosis Description

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AUTO ACTIVE TEST

Description

In auto active test, the IPDM E/R sends a drive signal to the following systems to check their operation.
• Oil pressure warning lamp
• Front wiper (LO, HI)
• Parking lamps
• License plate lamps
• Tail lamps
• Headlamps (LO, HI)
• A/C compressor (magnet clutch)
• Cooling fan

Operation Procedure

CAUTION:

Never perform auto active test in the following conditions.
• Engine is running
• CONSULT-III is connected
1.

Close the hood and lift the wiper arms from the windshield. (Prevent windshield damage due to wiper
operation)
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.

2.

Turn the ignition switch OFF.

3.

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

CAUTION:

Close passenger door.

4.

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

CAUTION:

Engine starts when ignition switch is turned ON while brake pedal is depressed.

5.

The oil pressure warning lamp starts blinking when the auto active test starts.

6.

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

NOTE:
• When auto active test has to be cancelled halfway through test, turn the ignition switch OFF.
• When auto active test is not activated, door switch may be the cause. Check door switch. Refer to 

XX-XX,

"*****"

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Inspection in Auto Active Test

When auto active test is actuated, the following operation sequence is repeated 3 times.

Operation 
sequence

Inspection location

Operation

1

Oil pressure warning lamp

Blinks continuously during operation of auto active test 

2

Front wiper

LO for 5 seconds 

→

 HI for 5 seconds

3

• Parking lamps
• License plate lamps
• Tail  lamps

10 seconds

4

Headlamps

LO for 10 seconds 

→

HI ON 

⇔

 OFF 5 times

5

A/C compressor (magnet clutch)

ON 

⇔

 OFF 5 times

6

Cooling fan

LO for 5 seconds 

→

 MID for 3 seconds 

→

 HI for 2 seconds

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DIAGNOSIS SYSTEM (IPDM E/R)

PCS-37

< SYSTEM DESCRIPTION >

[IPDM E/R (WITHOUT I-KEY)]

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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

JMMIA0355GB

Symptom

Inspection contents

Possible cause

Any of the following components do not operate

• Parking lamps
• License plate lamps
• Tail  lamps
• Headlamps (HI, LO)
• Front wiper (HI, LO)

Perform auto active test.
Does the applicable system 
operate?

YES

BCM signal input circuit

NO

• Lamp or motor
• Lamp or motor ground circuit
• Harness or connector between 

IPDM E/R and applicable system

• IPDM  E/R

A/C compressor does not operate

Perform auto active test.
Does the magnet clutch oper-
ate?

YES

• BCM signal input circuit
• CAN communication signal be-

tween BCM and ECM

• CAN communication signal be-

tween ECM and IPDM E/R

NO

• Magnet clutch
• Harness or connector between 

IPDM E/R and magnet clutch

• IPDM  E/R

Oil pressure warning lamp does not operate

Perform auto active test.
Does the oil pressure warning 
lamp blink?

YES

• Harness or connector between 

IPDM E/R and oil pressure 
switch

• Oil pressure switch
• IPDM  E/R

NO

• CAN communication signal be-

tween IPDM E/R and BCM

• CAN communication signal be-

tween BCM and combination 
meter

• Combination meter

Cooling fan does not operate

Perform auto active test.
Does the cooling fan operate?

YES

• ECM signal input circuit
• CAN communication signal be-

tween ECM and IPDM E/R

NO

• Cooling fan motor
• Harness or connector between 

IPDM E/R and cooling fan motor

• IPDM  E/R