Nissan Maxima Service and Repair Manual: B2578, B2579 in-vehicle sensor
Description
In-vehicle Sensor
- The in-vehicle sensor (1) is located on instrument lower cover (LH).
- It converts variations in compartment air temperature drawn from the aspirator into a resistance value. It is then input into the A/C auto amp.
In-vehicle Sensor Circuit
Aspirator
The aspirator (1) is located on driver side of heater & cooling unit assembly. It produces vacuum pressure due to air discharged from the heater & cooling unit assembly, continuously taking compartment air in the aspirator.
DTC Logic
DTC DETECTION LOGIC
NOTE: If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010.
DTC CONFIRMATION PROCEDURE
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
- Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
- Check if any DTC No. is displayed in the self-diagnosis results.
NOTE: If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010.
Diagnosis Procedure
1.CHECK IN-VEHICLE SENSOR POWER SUPPLY
- Disconnect in-vehicle sensor connector.
- Turn ignition switch ON.
- Check voltage between in-vehicle sensor harness connector M34 terminal 1 and ground.
1 - Ground: Approx. 5V
2.CHECK CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.
- Turn ignition switch OFF.
- Disconnect A/C auto amp. connector.
- Check continuity between in-vehicle sensor harness connector M34 (A) terminal 2 and A/C auto amp. harness connector M37 (B) terminal 37.
2 - 37: Continuity should exist.
3.CHECK IN-VEHICLE SENSOR
Check in-vehicle sensor.
4.CHECK CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.
- Turn ignition switch OFF.
- Disconnect A/C auto amp. connector.
- Check continuity between in-vehicle sensor harness connector M34 (A) terminal 1 and A/C auto amp. harness connector M37 (B) terminal 36.
1 - 36: Continuity should exist.
- Check continuity between in-vehicle sensor harness connector M34 (A) terminal 1 and ground.
1 - Ground: Continuity should not exist.
Component Inspection
1.CHECK IN-VEHICLE SENSOR
- Turn ignition switch OFF.
- Disconnect in-vehicle sensor connector.
- Check resistance between in-vehicle sensor terminals.
B257B, B257C ambient sensor
Description
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor (1) is installed to the front bumper
reinforcement.
It detects ambient temperature and converts it into a resistance
...
B2581, B2582 intake sensor
Description
Intake Sensor
The intake sensor is located on the evaporator.
It converts air temperature after it passes through the evaporator
into a resistance value which is then input to ...
Other materials:
B2268 water temp
Description
The engine coolant temperature signal is transmitted from ECM to the
combination meter via CAN communication.
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS OF ECM
Perform "Self Diagnosis Result" of ECM, and repair or replace malfunctioning
parts.
...
Charging system
System Diagram
System Description
The generator provides DC voltage to operate the vehicle's electrical system
and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Component Description
...
Precaution
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and
"SEAT BELT PRE-TENSIONER
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT
PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk
or severity of injury to the driver and front p ...
Nissan Maxima Owners Manual
- Illustrated table of contents
- Safety-Seats, seat belts and supplemental restraint system
- Instruments and controls
- Pre-driving checks and adjustments
- Monitor, climate, audio, phone and voice recognition systems
- Starting and driving
- In case of emergency
- Appearance and care
- Do-it-yourself
- Maintenance and schedules
- Technical and consumer information
Nissan Maxima Service and Repair Manual
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