Workshop Manuals Factory service & repair Volvo
01 Relays and Modules02 Sensors and Switches03 Maintenance04 Engine, Cooling and Exhaust05 Powertrain Management06 Transmission and Drivetrain07 Brakes and Traction Control08 Starting and Charging09 Power and Ground Distribution10 Steering and Suspension11 Heating and Air Conditioning12 Restraint Systems13 Accessories and Optional Equipment14 Body and Frame15 Cruise Control16 Instrument Panel, Gauges and Warning Indicators17 Lighting and Horns18 Windows and Glass19 Wiper and Washer Systems
Volvo V70R AWD L5-2.3L Turbo VIN 52 B5234T6 (1998)01 · Relays and Modules
01 · Diagnostics

Engine Control Module: Diagrams (page 3 of 8)

Make
Volvo
Model
V70R AWD
Engine
L5-2.3L Turbo VIN 52 B5234T6
Year
1998
Section
Relays and Modules - Powertrain Management › Relays and Modules - Computers and Control Systems › Engine Control Module
Relays and ModulesDiagrams · page 3 of 8
Engine Control Module: Diagrams (page 3 of 8) – Volvo V70R AWD L5-2.3L Turbo VIN 52 B5234T6 (1998)

The Engine Control Module receives signals describing running conditions from the following components:

    

^  Engine speed and crankshaft position, from the Engine Speed (RPM) Sensor at the flywheel (7/25)
^  Working cycle in cylinders, from the Camshaft Position (CMP) Sensor (7/21)
^  Engine load, from the Mass Air Flow (MAF) Sensor (7/17)
^  Engine temperature, from the Engine Coolant Temperature (ECT) Sensor (7/16)
^  Throttle angle, from the Throttle Position (TP) Sensor (7/54)
^  Oxygen content of the exhaust gases upstream of the catalytic converter, from the front Heated Oxygen Sensor (HO2S) (7/15)
^  Oxygen content of the exhaust gases downstream of the catalytic converter, from the rear Heated Oxygen Sensor (HO2S) (7/82)
^  Engine knock (if present), from the two Knock Sensors (KS) (7/23 and 7/24)
^  Vehicle speed, from the Combined Instrument Panel (5/1)
^  Imminent gear-shifting, from the Automatic Transmission Control Module (TCM) (4/28) (automatics only)
^  Gear selector lever in Park/Neutral or DRIVE position, from the Automatic Transmission Control Module (TCM) (4/28)
^  Request to light the Malfunction Indicator Lamp (MIL) from the Automatic Transmission Control Module (TCM) (4/28)
^  Vertical acceleration of the car from the Accelerometer (7/79) to determine if the car is being driven on an uneven road, misfire diagnostic
^  If A/C is selected, from the A/C system Control Panel (3/54) A/C compressor ON signal, from the Pressure Switch (Pressostat) (7/53)
^  Pressure in the A/C unit, from the A/C Pressure Sensor (7/8)
^  Pulsed Secondary Air Injection System (PAIR) Pump Valve (8/43)
^  Fuel tank pressure from the Fuel Tank Pressure Sensor (7/84).

CONTROL FUNCTIONS 

The Engine Control Module controls the following components and functions on the basis of these input signals:

    

^  Main relay (2/32)
^  Fuel pump, by activating the Fuel Pump Relay (2/23)
^  Fuel injection, by operating the Injectors (8/6-8/10) individually

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The same page in: V70R AWD L5-2.3L Turbo VIN 52 B5234T6 (1998), V70R AWD L5-2.3L Turbo VIN 52 B5234T6 (1998), V70R AWD L5-2.3L Turbo VIN 52 B5234T6 (1998).

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