XC70 AWD L6-3.2L VIN 98 B6324S (2009)
The engine control module (ECM) supplies other control modules with the current outside temperature by transmitting information on the controller area
The temperature sensor is a resistor with a negative temperature coefficient, so called NTC type. It is supplied with power from the control module.
The resistance in the sensor changes according to the ambient temperature of the vehicle. This provides the engine control module (ECM) with a signal
of between 0-5 V. Low temperature results in high resistance (high voltage). High temperature results in low resistance (low voltage).
The outside temperature sensor is positioned in the left door mirror.
The engine control module (ECM) can diagnose the outside temperature sensor. The sensor value can be read off using the diagnostic tool.
Manifold absolute pressure (MAP) sensor, intake
The manifold absolute pressure (MAP) sensor detects quick pressure changes in the intake manifold after the throttle. The signal from the sensor is used
by the engine control module (ECM) to supplement the mass air flow (MAF) sensor when calculating injection period.
Manifold absolute pressure (MAP) sensor, intake is located on the lower part of the intake manifold at the electronic throttle module.
The semi-conductor sensor is grounded in the control module and is supplied with power from the control module.
The resistance in the intake manifold moves the silicone membrane in the sensor, giving a signal of 0.5 - 4.5 V to the control module. Low pressure
results in low voltage, high pressure gives high voltage.
The pressure sensor can be diagnosed by the engine control module (ECM) and the sensor signal can be read off.
Fuel pressure sensor / fuel temperature sensor
The fuel pressure, fuel temperature sensor is combined and consists of both the fuel pressure sensor and the fuel temperature sensor. The sensor detects
the fuel pressure (the absolute pressure) and the temperature of the fuel in the fuel rail.
The fuel pressure sensor is located on the fuel rail's end.
The fuel pressure-/fuel temperature sensor can be diagnosed by the engine control module (ECM) and its signals (pressure and temperature) can be read
Fuel pressure sensor
The pressure sensor is a Piezo resistive type resistor, the resistance of which changes with the pressure. Depending on the pressure in the fuel rail, an