LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volvo >> 2012 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control - Signal Description And Specification >> Specifications, Engine Management System (B5254T2; 2005-2007) >> Component Specifications
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Specifications

The component specification gives the value of the component when the connector is disconnected. Where no value is given, it is not possible to measure a relevant value at the component.

The figure within the brackets indicates the terminal pin on the component to which the value refers.

Designation  Type  Supply voltage  Value  Miscellaneous 
A/C-relay Mechanical relay 12V (#1) Approximately 96 Ω (coil)  
A/C pressure sensor Absolute pressure sensor 5 V (#3) -  
Brake lamp switch Position switch 12 V (#1) The switch is closed when the pedal is depreseed(terminals#1-#5)  
Fuel pump Mechanical relay - Approximately 96 Ω (coil) The relay is controlled by the central electronic module (CEM)
Male Temperature probe NTC-resistance 5V (#3) 5896 Ω at 0°C
3792 Ω at 10°C
2500Ω at 20°C
1707Ω at 30°C
1175 Ω at 40°C
(#1-#2)
Integrated in brαnsletryckgivare
Fuel pressure sensor Piezoresistiv tryckgivare 5V (#3) -  
Cooling fan controller - 12 V (#2) -  
EVAP-valve Electromagnetic valve 12 V (#1) 17-24 Ω at 20°C (#1-#2)  
Accelerator pedal position sensor Electronic pedal sensor with 2 output signals, PWM- and a linear analog signal 12 V (#1) 5 V (#6) Power supply analog position sensors -  
Throttle unit Electronic throttle control module with two integrated potentiometers and a damper motor 5 V (#3) 1.2-3.5 Ω (#1-#4 motor winding).
1000-1500 Ω (#2-#3 Parallel connection of potentiometers1 and 2).
Approximately 820 Ω when the throttle is closed. Ca 1580 Ω at wide open throttle(#2-#6 potentiometer 1).
Approximately 1480 Ω when the throttle is closed. Approximately 500 Ω at wide open throttle (#2-#5 potentiometer 2)
-
Fuel injector Electromagnetic injector valve 12 V (#1) Approximately 12 Ω at 20°C (#1-#2)  
Camshaft sensor Magneto-resistive sensor 5 V (#1) -  
Knock sensor Piezo electric component - Greater than 1 MΩ (#1-#2 front knock sensor).
Greater than 1 MΩ
(#3- #4 rear knock sensor)
Separate signal ground for knock sensors
Clutch pedal sensor Slide potentiometer 5 V (#2) Unaffected pedal: 1400-2400 Ω
Fully depressed pedal: 200-800 Ω (#2-#4)
 
Engine cooling fan control module Fan motor 12 V (#1) - The engine cooling fan is controlled by the engine control module
Coolant level sensor Position switch Connected to ground (#2) Closed when engine coolant level is normal  
Boost pressure sensor Absolute pressure sensor 5 V (#3) -  
Preheating front heated oxygen sensor PTC resistor 12 V (#3) 2, 6-3, 4 Ω at 20°C (#3-#4)  
Preheating rear heated oxygen sensor PTC resistor 12 V (#1) Approximately 9 Ω at 20°C (#1-#2)  
Mass air flow sensor - 12 V (#2)
5 V (#4)
-  
Intake air temperature sensor inlet NTC resistor 5 V (#3) 5886 Ω at 0°C
3791 Ω at 10°C
2510 Ω at 20°C
1715 Ω at 30°C
(#1-#2)
Integrated in the mass air flow sensor
Leak diagnostic unit Consists of an air pump, electromagnetic valve and an internal heating element (PTC resistor 12 V (#4) Approximately 118 Ω (#1-#4 pump motor winding)
27.9 -34.1 Ω (#3-#4 Valve coil)
The heating element for heating up the pulsed secondary air injection system pump is controlled by the central electronic module (CEM)
Engine coolant temperature sensor NTC resistor 5 V (#1) 15040 Ω at -20°C
2450 Ω at 20°C
318 Ω at 80°C
(#1- #2)
 
PTC-resistor air preheating PTC resistor 12 V (#1) Approximately 10 Ω at 20°C  
Oil level sensor Elektronisk givare med PTC-motst nd och kapacitiva mαtelement 5 V (#3) -  
Oil pressure sensor Pressure switch (Pressostat) Grounded in the cylinder Closed switch when the oil pressure is low  
Camshaft reset valve Electromagnetic valve 12 V (#1) 3.7-11.1 Ω (#1-#2)  
Flywheel sensor Engine speed sensor - 108.5-142.5 Ω at 20°C (#1-#2)  
System relay Mechanical relay 12V (#1) Approximately 80 Ω (coil)  
Turbocharger control valve Electromagnetic valve (3-way) 12 V (#1) 21.8-24.2 Ω at 20°C (#1-#2)  
Outer temperature sensor NTC resistor 5 V (#1) 18702 Ω at-20 °C
6318 Ω at 0°C
2424 Ω at 20°C
1034 Ω at 40°C
(#1- #3)