Nissan Altima 2007-2012 Service Manual: Ambient sensor
Description
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor (1) is attached on the front bumper reinforcement.
It detects ambient temperature and converts it into a resistance value which is then input into the front air control.
AMBIENT TEMPERATURE INPUT PROCESS
The automatic amplifier includes a processing circuit for the ambient sensor input. However, when the temperature detected by the ambient sensor increases quickly, the processing circuit retards the front air control function.
It only allows the front air control to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100 seconds.
As an example, consider stopping for a cup of coffee after high speed driving. Although the actual ambient temperature has not changed, the temperature detected by the ambient sensor will increase. This is because the heat from the engine compartment can radiate to the front grille area, location of the ambient sensor.
Diagnosis Procedure
DIAGNOSIS PROCEDURE FOR AMBIENT SENSOR
SYMPTOM: Ambient sensor circuit is open or shorted.
1.CHECK VOLTAGE BETWEEN AMBIENT SENSOR HARNESS CONNECTOR AND BODY GROUND
1. Disconnect ambient sensor connector.
2. Press ignition switch ON.
3. Check voltage between ambient sensor harness connector E211 terminal 1 and ground.
Is the inspection result normal? YES >> GO TO 2
NO >> GO TO 4
2.CHECK AMBIENT SENSOR GROUND CIRCUIT BETWEEN AMBIENT SENSOR AND IPDM E/R
1. Press ignition switch OFF.
2. Disconnect IPDM E/R connector E201.
3. Check continuity between IPDM E/R harness connector M201 (A) terminal 99 and ambient sensor harness connector E211 (B) terminal 2.
If OK, check harness for short.
Is the inspection result normal? YES >> GO TO 3
NO >> Repair harness or connector.
3.CHECK AMBIENT SENSOR
Check ambient sensor. Refer to HAC-51, "Component Inspection" Is the inspection result normal? YES >> 1. Replace front air control. Refer to VTL-8, "Removal and Installation".
2. Confirm system operation.
NO >> Replace ambient sensor. Refer to HA-43, "Removal and Installation".
4.CHECK AMBIENT SENSOR CIRCUIT BETWEEN AMBIENT SENSOR AND IPDM E/R
1. Press ignition switch OFF.
2. Disconnect IPDM E/R connector E201.
3. Check continuity between IPDM E/R harness connector E201 (A) terminal 100 and ambient sensor harness connector E211 (B) terminal 1.
If OK, check harness for short.
Is the inspection result normal? YES >> 1. Replace IPDM E/R. Refer to PCS-48, "Removal and Installation".
2. Confirm system operation.
NO >> Repair harness or connector.
Component Inspection
Ambient Sensor
After disconnecting ambient sensor (1) harness connector E1, measure resistance between terminals 2 and 1 at sensor side, using the table below.
If NG, replace ambient sensor. Refer to HA-43, "Removal and Installation".
Magnet clutch
Description
SYSTEM DESCRIPTION
Front air control controls A/C compressor operation by ambient temperature
and signal from ECM.
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Front air control will turn th ...
In-vehicle sensor
Component Description
In-vehicle sensor
The in-vehicle sensor (1) is located on instrument lower panel LH. It
converts variations in temperature of compartment air drawn from
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Other materials:
Precautions on child restraints
WARNING
Failure to follow the warnings and instructions
for proper use and installation
of child restraints could result in
serious injury or death of a child or
other passengers in a sudden stop or
collision:
– The child restraint must be used and
installed properly. Always follow all ...
Reporting safety defects
For USA
If you believe that your vehicle has a defect
which could cause a crash or could
cause injury or death, you should immediately
inform the National Highway Traffic
Safety Administration (NHTSA) in addition
to notifying NISSAN.
If NHTSA receives similar complaints, it
may open an inv ...
AV Branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the AV control unit for damage, bend
and loose connection (unit
side and connector side).
I ...