XC70 AWD L6-3.2L VIN 98 B6324S (2009)
analog signal of 0 - 5 V is transmitted to the engine control module (ECM). Low pressure results in low voltage, high pressure gives high voltage.
The engine control module (ECM) then uses this signal to adjust the pressure in the fuel rail using the fuel pump control module. See also: Function See:
Powertrain Management/Computers and Control Systems/Description and Operation/Engine Control Module (ECM)/Function
The pressure sensor is supplied with 5 V and grounded in the engine control module (ECM). The pressure sensor transmits a signal indicating the fuel
pressure to the engine control module (ECM) on a separate cable.
Note! The absolute pressure is displayed when using parameter read outs to read off the fuel pressure. If there is no pressure at the fuel rail, the
atmospheric pressure will be displayed.
Hint: The relative pressure (absolute pressure minus atmospheric pressure) is displayed when reading off the fuel pressure via a manometer connected to
the fuel rail.
Fuel temperature sensor
The temperature sensor is an NTC sensor. The sensor is supplied with voltage (signal) from and grounded in the engine control module (ECM).
The resistance in the sensor changes according to the temperature of the fuel. This provides the engine control module (ECM) with a signal of between 0
- 5 V. Low temperature results in high voltage (high resistance). High temperature results in low voltage (low resistance).
The engine control module (ECM) uses the signal to calculate the volume of the fuel.
Oil level and oil temperature sensor
The sensor is a combined oil level and oil temperature sensor. The function of the sensor is to provide the engine control module (ECM) with
information about the level and temperature of the engine oil in the oil trough.
The sensor consists of:
a terminal with three pins
2 capacitive gauge elements
a PTC resistor.
The sensor is supplied with 5 V from the engine control module (ECM) and generates a pulse width modulation (PWM) signal to the engine control
The engine control module (ECM) can diagnose the sensor.
Main relay (system relay)