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.
| Direct diagnostic mode | Description |
| Ecu identification | The bcm part number is displayed. |
| Self diagnostic result | The BCM self diagnostic results are displayed. |
| Data monitor | The bcm input/output data is displayed in real time. |
| Active test | The bcm activates outputs to test components. |
| Work support | The settings for BCM functions can be changed. |
| Configuration |
|
| CAN DIAG SUPPORT MNTR | The result of transmit/receive diagnosis of can communication is displayed. |
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.
| Direct diagnostic mode | Description |
| Ecu identification | The bcm part number is displayed. |
| Self diagnostic result | The bcm self diagnostic results are displayed. |
| Data monitor | The BCM input/output data is displayed in real time. |
| Active Test | The BCM activates outputs to test components. |
| Work support | The settings for bcm functions can be changed. |
| Configuration |
|
| Can diag support mntr | The result of transmit/receive diagnosis of can communication is displayed. |
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
- 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.
- Turn the ignition switch OFF.
- Turn the ignition switch on, and within 20 seconds, press the driver door switch 10 times. Then turn the ignition switch off.
- Turn the ignition switch on within 10 seconds. After that the horn sounds once and the auto active test starts.
- 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.
| Direct diagnostic mode | Description |
| Ecu identification | The IPDM E/R part number is displayed. |
| Self diagnostic result | The ipdm e/r self diagnostic results are displayed. |
| Data monitor | The ipdm e/r input/output data is displayed in real time. |
| Active test | The ipdm e/r activates outputs to test components |
| Can diag support mntr | The result of transmit/receive diagnosis of can communication is displayed. |
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
- 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.
- Turn the ignition switch off
- Turn the ignition switch on, and within 20 seconds, press the driver door switch 10 times. Then turn the ignition switch off.
- Turn the ignition switch on within 10 seconds. After that the horn sounds once and the auto active test starts.
- 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.
| Direct diagnostic mode | Description |
| Ecu identification | The ipdm e/r part number is displayed. |
| Self Diagnostic Result | The IPDM E/R self diagnostic results are displayed. |
| Data monitor | The ipdm e/r input/output data is displayed in real time. |
| Active Test | The IPDM E/R activates outputs to test components. |
| Can diag support mntr | The result of transmit/receive diagnosis of can communication is displayed. |
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".
Component parts
Component parts location
Bcm (view with instrument panel removed)
Ipdm e/r (rear window defogger relay)
A/c auto amp. (View with a/c switch
assembly removed)
A/C switch assembly (rear ...
Ecu diagnosis information
Bcm, ipdm e/r
List of ecu reference
...
Other materials:
Recommended fluids/lubricants and capacities
The following are approximate capacities. The actual refill capacities may
be slightly different. When refilling, follow the procedure
described in the “Maintenance and do-it-yourself” section to determine the
proper refill capacity.
...
L terminal circuit (open)
Description
The “L” terminal circuit controls the charge warning lamp. The charge warning
lamp turns ON when the ignition
switch is set to ON or START. When the generator is providing sufficient voltage
with the engine running,
the charge warning lamp turns OFF. If the charge warnin ...
On board diagnostic (OBD) system
Diagnosis Description
This system is an on board diagnostic system that records exhaust
emission-related diagnostic information
and detects a sensors/actuator-related malfunction. A malfunction is indicated
by the malfunction indicator
lamp (MIL) and stored in ECU memory as a DTC. The diagnos ...
