Bosch Oil Pressure and Temp Sensor Wiring 2

7 Essential Tips for Bosch Oil Pressure & Temp Sensor Wiring

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Comprehensive Guide to Bosch Oil Pressure and Temperature Sensor Wiring

Overview

The Bosch oil pressure and temperature sensor is a critical component in engine management systems, providing real-time data on oil pressure and temperature. This comprehensive guide will walk you through the step-by-step process of properly wiring this sensor for optimal performance.

What are the Technical Specifications of the Bosch Oil Pressure and Temperature Sensor?

The Bosch oil pressure and temperature sensor has the following technical specifications:

  • Power Supply: 5V
  • Temperature Range: -40°C to 150°C
  • Pressure Range: Varies by model (e.g., 0.1 to 1.15 bar or 0.2 to 3 bar)
  • Connector: Typically a Bosch Compact connector
  • Pin Configuration:
  • Pin 1: Ground
  • Pin 2: Temperature Signal
  • Pin 3: Power

How to Wire the Bosch Oil Pressure and Temperature Sensor?

Follow these step-by-step instructions to properly wire the Bosch oil pressure and temperature sensor:

  1. How to Connect the Power Supply?

  2. Connect the power wire (usually red) to a 5V supply from your system. Ensure the voltage is within the specified range (4.75V to 5.25V).

  3. How to Ground the Sensor?

  4. Connect the ground wire (usually black) to the system ground. This is crucial for proper signal reference.

  5. How to Connect the Temperature Signal?

  6. The temperature signal wire (usually orange) needs to be connected through a voltage divider to measure the temperature. Typically, a pull-up resistor (e.g., 4.6kΩ) is recommended for optimal performance.

  7. Connect one end of the pull-up resistor to the 5V supply and the other end to the temperature signal wire. Then, connect the temperature signal wire to an analog input pin on your controller (e.g., Arduino A3).

  8. How to Connect the Pressure Signal?

  9. The pressure signal wire (usually blue) should be connected directly to an analog input pin on your controller (e.g., Arduino A1). No additional circuitry is typically required for pressure readings.

What is an Example Wiring Configuration?

Here’s an example wiring configuration for the Bosch oil pressure and temperature sensor:

  • Power (Red): 5V Supply
  • Ground (Black): System Ground
  • Temperature (Orange): Through a 4.6kΩ pull-up resistor to 5V and then to an analog input pin (e.g., A3)
  • Pressure (Blue): Directly to an analog input pin (e.g., A1)

What are Some Troubleshooting Tips for the Bosch Oil Pressure and Temperature Sensor?

  1. Incorrect Temperature Readings:
  2. Ensure the temperature signal wire is properly connected through the pull-up resistor. Incorrect wiring can result in reversed or incorrect temperature readings.

  3. Verify that the pull-up resistor value is correct and matches the sensor’s specifications.

  4. No Signal:

  5. Check for proper power supply and ground connections. Ensure there are no shorts or open circuits.

  6. Verify that the sensor is not damaged and that all connections are secure.

  7. Noise in the Signal:

  8. Use an RC-low pass filter (tau = 2 ms) to filter out noise, especially if the sensor is connected directly to an ECU.

What are Some Successful Installation Examples?

  1. Direct Engine Block Installation:

  2. The sensor can be mounted directly to the engine block for accurate measurements. Ensure proper sealing to avoid damage from condensate.

  3. Integration with ECU:

  4. The sensor can be connected directly to most control units. Ensure the ECU is configured to accept the signal from the sensor.

Reference Links

  1. Bosch Automotive Pressure & Temperature Sensor Wiring Discussion:

  2. Bosch automotive pressure & temperature sensor 0281006059 – 0281006060

  3. How to Depin a Bosch Pressure and Temp Sensor:

  4. How To Depin A Bosch Pressure And Temp Sensor

  5. Bosch Motorsport Pressure/Temp Sensor Combined PST-F1:

  6. Bosch Motorsport Pressure/Temp Sensor Combined PST-F 1 Question

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