Nissan Sentra Service Manual: System

System Description

Operation description

• A/C control transmits rear window defogger switch signal to A/C auto amp. when rear window defogger switch turns ON while ignition switch is ON.
• A/C auto amp. transmits rear window defogger switch signal to BCM
• Bcm transmits rear window defogger control signal to ipdm e/r via can communication.
• Ipdm e/r turns rear window defogger relay on when rear window defogger control signal is received.
• The power is supplied to rear window defogger and door mirror defogger* when rear window defogger relay is on.
• When rear window defogger is activated, rear window defogger feedback signal is transmitted to a/c control via a/c auto amp. And the indicator lamp on rear window defogger switch turns on.

*: With door mirror defogger.

Timer function

• BCM transmits rear window defogger control signal to IPDM E/R for approximately 15 minutes when the rear window defogger switch turns ON while ignition switch is ON. Then, IPDM E/R activates rear window defogger and door mirror defogger*.
• The timer is cancelled if rear window defogger switch is pressed again during timer operation, and bcm stops the output of rear window defogger control signal. The same action occurs during timer operation if ignition switch is off.

*: With door mirror defogger.

Diagnosis system (bcm) (with intelligent key system)

COMMON ITEM

COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

Application item

Consult performs the following functions via can communication with bcm.

System application

BCM can perform the following functions.

Rear window defogger

Rear window defogger : consult function (bcm - rear defogger)

Data monitor

Active test

Diagnosis system (bcm) (without intelligent key system)

Common item

Common item : consult function (bcm - common item)

Application item

CONSULT performs the following functions via CAN communication with BCM.

System application

BCM can perform the following functions.

Rear window defogger

REAR WINDOW DEFOGGER : CONSULT Function (BCM - REAR DEFOGGER)

Data monitor

Active test

Diagnosis system (ipdm e/r) (with intelligent key system)

Diagnosis description

Auto active test

Description

• In auto active test, the ipdm e/r sends a drive signal to the following systems to check their operation.
• Front wiper (lo, hi)
• Parking lamp
• License plate lamp
• Tail lamp
• Front fog lamp (if equipped)
• Headlamp (lo, hi)
• A/c compressor (magnet clutch)
• Cooling fan

Operation procedure

Note:

Never perform auto active test in the following conditions.

• Passenger door is open
• Consult 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.
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 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 DLK-103, "Component Inspection".

Inspection in auto active test

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

Concept of auto active test

• Ipdm e/r starts the auto active test with the door switch signals transmitted by bcm via can communication.

  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

Consult function (ipdm e/r)

Application item

Consult performs the following functions via can communication with ipdm e/r.

Ecu identification

The ipdm e/r part number is displayed.

Self diagnostic result

Refer to pcs-20, "dtc index".

Data monitor

Active test

Can diag support mntr

Refer to lan-13, "can diagnostic support monitor".

Diagnosis system (ipdm e/r) (without intelligent key system)

Diagnosis Description

Auto active test

Description

In auto active test, the IPDM E/R sends a drive signal to the following systems to check their operation.

• Front wiper (lo, hi)
• Parking lamp
• License plate lamp
• Tail lamp
• Front fog lamp (if equipped)
• Headlamp (lo, hi)
• A/c compressor (magnet clutch) (if equipped)
• Cooling fan

Operation procedure

Note:

Never perform auto active test in the following conditions.

• Passenger door is open
• Consult 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.
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 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 DLK-255, "Component Inspection".

Inspection in auto active test

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

Concept of auto active test

• Ipdm e/r starts the auto active test with the door switch signals transmitted by bcm via can communication.

  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

CONSULT Function (IPDM E/R)

Application item

Consult performs the following functions via can communication with ipdm e/r.

Ecu identification

The ipdm e/r part number is displayed.

Self diagnostic result

Refer to pcs-48, "dtc index".

Data monitor

Active test

Can diag support mntr

Refer to LAN-13, "CAN Diagnostic Support Monitor".

© 2014-2026 Copyright b17.nisentra.com