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Control Modules - Signal Specification for Diagnostic Procedures: Overview Volvo XC90 I

Communication Devices 2 illustrations ~149 words

Scheme 5

Scheme 5: REAR ELECTRONIC MODULE (REM) CONNECTORS A-E

Connector A, terminals #A1-#A20

The following values are measured between the relevant terminal and terminal #E1 (power ground) unless otherwise stated.

The values are measured with the control module in "Active mode".

Note. It is important to connect the breakout box and check the ground terminals before taking readings.

U = DC in volts (V).

Ubat = battery voltage in volts (V).

Ulow = Voltage close to 0 V.

NC = Not connected

NC* = grounded via capacitor (C=22nF)

Terminal, breakout boxTerminal, control moduleSignal typeIgnition off Active / not activeIgnition on Active / not activeOther
#A01#A1Spare input (30)U~UbatU~UbatAt no input
#A02#A2Fuel level sensor, left-hand side (+). Switched signal, 5/35 ms.U~UlowU=0.54-3.96 VFull: 0.54 V Empty: 3.96 V For Bi-fuel cars this applies to the LPG gas tank The terminal is not used if the tank is PZEVEVAP or EVAP 2.
#A03#A3Reserve output (switch to ground)U~UlowU~Ulow
#A04#A4Stop lamp, relay driver from the central electronic module (CEM)U~Ulow / UbatU~Ulow / Ubat
#A05#A5
#A06#A6Reserve, analog input signalNC*NC*
#A07#A7Signal ground (-)U~UlowU~Ulow
#A08#A8Fuel level sensor, right-hand side (+). Switched signal, 5/35 ms.U~UlowU=0.54-3.96 VFull: 0.54 V Empty: 3.96 V
#A09#A9Spare input (30)U~UbatU~UbatAt no input
#A10#A10Fuel level sensor common groundU~UlowU~Ulow
#A11#A11Reserve, analog input signalNC*NC*
#A12#A12Signal ground (-)U~UlowU~Ulow
#A13#A13Reserve output (switch to ground)U~UlowU~Ulow
#A14#A14CAN HDuring communication U=2.0-3.5 V
#A15#A15Volcano Lite CAN HDuring communication U=2.0-3.5 V
#A16#A16CAN LDuring communication U=2.0-3.5 V
#A17#A17Volcano Lite CAN LDuring communication U=2.0-3.5 V
#A18#A18ReserveU~UlowU~UlowNC
#A19#A19Reserve output (switch to ground)U~UlowU~Ulow
#A20#A20
#A21#B1Spare input (GND)U~UlowU~UlowAt no input
#A22#B2Spare input (GND)U~UlowU~UlowAt no input
#A23#B3Reserve output (switch to ground)U~UlowU~Ulow
#A24#B4ReserveU~UlowU~UlowNC
#A25#B5Power supply, fuel level sensor, CNGU~UlowU~ 5VBi-fuel
#A26#B6Signal ground, position sensor for headlamp beam height controlU~UlowU~Ulow
#A27#B7Reserve output (switch to ground)U~UlowU~Ulow
#A28#B8Analog input signal from the position sensor for headlamp beam height control.U~UlowU=1.7-3.2VNC
#A29#B9ReserveU~UlowU~UlowNC
#A30#B10Power supply, position sensor for headlamp beam height controlU~UlowU=5 V
#A31#B11ReserveU~UlowU~UlowNC
#A32#B12ReserveU~UlowU~UlowNC
#A33#B13ReserveU~UlowU~UlowNC
#A34#B14ReserveU~UlowU~UlowNC
#A35#B15ReserveU~UlowU~UlowNC
#A36#B16Input signal fuel level sensor (pressure), CNGU~UlowU=0.5V-4.5VFull (200bar): 4.5V Empty (0 bar): 0.5V
#A37#B17ReserveU~UlowU~UlowNC
#A38#B18ReserveU~UlowU~UlowNC
#A39#B19ReserveU~UlowU~UlowNC
#A40#B20ReserveU~UlowU~UlowNC
#A41#C1Input signal, fuel level sensor (temperature), CNGU~UlowU=0V-5V0°C~4 V 25°C~2.5 V
#A42#C2Signal ground fuel level sensor, CNGU~UlowU~UlowBi-fuel
#A43#C3ReserveU~UlowU~UlowNC
#A44#C4
#A45#C5
#A46#C6Reserve output (switch to ground)U~UlowU~Ulow
#A47#C7ReserveU~UlowU~UlowNC
#A48#C8Reserve output (switch to ground)U~UlowU~Ulow
#A49#C9ReserveU~UlowU~UlowNC
#A50#C10ReserveU~UlowU~UlowNC
#A51#C11Reserve output (switch to ground)U~UlowU~Ulow
#A52#C12Reserve output (switch to ground)U~UlowU~Ulow
#A53#C13ReserveU~UlowU~UlowNC
#A54#C14ReserveU~UlowU~UlowNC
#A55#C15ReserveU~UlowU~UlowNC
#A56#C16ReserveU~UlowU~UlowNC
#A57#C17Spare input (30)U~UbatU~UbatAt no input
#A58#C18Spare input (30)U~UbatU~UbatAt no input
#A59#C19ReserveU~UlowU~UlowNC
#A60#C20Reserve output (switch to ground)U~UlowU~Ulow
#B01#D1Relay driver, rear windshield heatingU~UbatU~Ulow / UbatGrounded when the relay is activated
#B02#D2Relay driver, rear 15l-supply
#B03#D3ReserveU~UlowU~UlowNC
#B04#D4Signal voltage, high mounted stop lampU~Ubat / UlowU~Ubat / Ulow5 door
#B05#D5Reserve5V / Ulow5V / UlowNC
#B06#D6Serial communication, input signal from the level sensor control moduleDuring communication U=8-11 VDuring communication U=8-11 VCommunicates when the car is alarmed. Conditional on the car being equipped with an inclination sensor module (ISM).
#B07#D7Input signal from the tailgate handleU~Ulow / UbatU~Ulow / UbatApplies to 4-door models. Grounded when the tailgate handle is pressed in.
#B08#D8Spare input (30)UbatUbatAt no input
#B09#D9Spare input (30)UbatUbatAt no input
#B10#D10Spare input (30)UbatUbatAt no input
#B11#D11U~UlowU~UlowNC
#B12#D12Reserve, relay RMA 04U~UlowU~Ulow
#B13#D13Reserve, relay RMI 09U~UlowU~Ulow
#B14#D14Reserve, relay RMI 10U~UlowU~Ulow
#B15#D15Reserve, relay RMI 25U~UlowU~Ulow
#B16#D16Relay driver, warm-up cycle diesel filterU~UlowU~Ulow / Ubat
#B17#D17Reserve, relay RST 01U~UlowU~Ulow
#B18#D18Relay driver, rear X-supply
#B19#D19Reserve output (switch to ground)U~UlowU~Ulow
#B20#D20Power supply to the tilt sensor. Output signal.U~Ulow / UbatU~UlowSupplied with voltage when the car is alarmed. Conditional on the car being equipped with an inclination sensor module (ISM).

The power signals below are measured between the relevant terminal and terminal #E1 (power ground)

Terminal, breakout boxTerminal, control moduleSignal typeIgnition off Active / not activeIgnition on Active / not activeOther
#B21#E1Power groundU~UlowU~Ulow
#B22#E2Power supply to the cargo compartment lighting. Output signal.U~Ulow / UbatU~Ulow / UbatApplies to 4-door models. Activated when the trunk lid is open. Goes out after 30 minutes Goes out when driving forward with the trunk lid open. The ignition must be switched off before it lights again. Can be switched off via the upper electronic module (UEM).
#B23#E3ReserveU~UlowU~UlowNC
#B24#E4Power supply to the rear fog lamp. Input signal.U~UbatU~Ubat
#B25#E5ReserveU~UlowU~UlowNC
#B26#E6Power supply to the rear electronic module (REM)U~UbatU~Ubat
#B27#E7ReserveU~UlowU~UlowNC
#B28#E8ReserveU~UlowU~UlowNC

Scheme 6

Scheme 6: RESISTANCE VALUES, FUEL LEVEL SENSOR

Readings for the left fuel level sensor are taken between terminals #5 and #6.

Readings for the right fuel level sensor are taken between terminals #7 and #6.

The following table lists the fuel level sensor resistance and the corresponding fuel volume.

Resistance (ohm)Fuel volume (liters)
1240
3835
6630
9625
13020
17115
22310
2975
3831