Volvo Workshop Manuals
XC90 AWD L6-2.9L Turbo VIN 91 B6294T (2004)
Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Description and Operation > System Overview > Page 970
For safety reasons, the engine control module (ECM) shuts off the fuel pump (FP) if the supplemental restraint system module (SRS) detects a collision.
Oil level monitoring (2004-, certain markets and models only)
The following components are used for oil monitoring:
the oil level sensor
engine control module (ECM)
driver information module (DIM).
One of the advantage of always monitoring the oil level is that the driver can then be informed, via the driver information module (DIM), if the oil needs
Oil quality detection
To calculate the quality of the oil, the capacitance of the oil is gauged and then compared with the capacitance of the air. (Capacitance is the ability to
Oil temperature detection
The PTC resistor integrated in the oil level sensor is used to calculate the oil temperature. The resistance of the PTC resistor changes, depending on the
Oil level detection
The electronics integrated in the sensor calculate the oil level using the obtained values for oil temperature and quality.
Oil level sensor signal
The oil level sensor internally calculates the parameters for oil level, quality and temperature. A PWM signal is then generated and transmitted on a cable
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