Nissan Maxima Service and Repair Manual: Refrigerant pressure sensor
Description
The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent to ECM, and ECM controls cooling fan system.
Component Function Check
1.CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
- Start engine and warm it up to normal operating temperature.
- Turn A/C switch and blower fan switch ON.
- Check the voltage between ECM harness connector terminals under the following conditions.
Diagnosis Procedure
1.CHECK GROUND CONNECTION
- Turn A/C switch and blower fan switch OFF.
- Stop engine.
- Turn ignition switch OFF.
- Check ground connection E9.
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
- Disconnect refrigerant pressure sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between refrigerant pressure sensor harness connector and ground.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E3, F1
- Junction block connectors E44, E45
- IPDM E/R harness connectors E18, E201
- Harness for open or short between ECM and refrigerant pressure sensor
4.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
- Also check harness for short to ground and short to power.
5.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E3, F1
- IPDM E/R harness connectors E18, E201
- Harness for open or short between ECM and refrigerant pressure sensor
6.CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
- Also check harness for short to ground and short to power.
7.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E3, F1
- IPDM E/R harness connectors E18, E201
- Harness for open or short between ECM and refrigerant pressure sensor
8.CHECK INTERMITTENT INCIDENT
Positive crankcase ventilation
Description
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase
blow-by gas to the intake
manifold.
D ...
Variable induction air system
Description
Power Valves 1 and 2
The power valves 1 and 2 are installed in intake manifold collector and used to
control the suction passage of
the variable induction air control system. They a ...
Other materials:
Before starting the engine
Make sure the area around the vehicle is
clear.
Check fluid levels such as engine oil, coolant,
brake fluid, and window washer fluid as
frequently as possible, or at least whenever
you refuel.
Check that all windows and lights are clean.
Visually inspect tires for their appearance
...
P1720 VSS
Description
ECM receives two vehicle speed signals via the CAN communication line. One is
sent from "ABS actuator and
electric unit (control unit)" via the combination meter, and the other is from
TCM (Transmission control module).
ECM uses these signals for engine control.
DTC Logic
DTC ...
Diagnosis and repair workflow
Repair Work Flow
WORK FLOW
DETAILED FLOW
1.CUSTOMER INFORMATION
Interview the customer to obtain detailed information about the symptom.
2.PRELIMINARY CHECK
Perform preliminary check
3.SELF-DIAGNOSIS
Perform SELF-DIAGNOSIS.
4.SYMPTOM
Check for symptoms.
5.MALFUNCTIONING PARTS
Repair or ...
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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