S40 2.4i L5-2.4L VIN 38 B5244S4 (2008)
connections, contact resistance and oxidation. Check the fuse. The voltage must be approximately battery voltage.
Ground terminal Headlamp Control Module (HCM)
Headlamp Control Module (HCM) has a ground input. The ground input from the control module is connected to a ground terminal in the body via a
ground lead. See the relevant wiring diagram for further information about the ground terminal.
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Ground input #2 F is power ground and connected to the ground connection in the body.
Checking the ground terminal
Check the ground cable between the Headlamp Control Module (HCM) #B2 F and ground connection for open-circuit, loose connections, contact
resistance or oxidation. At ignition on, the voltage-drop between Headlamp Control Module (HCM) ground connection and chassis connection may not
be greater than 0.5 V.
Remedy as necessary.
Other information
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Signal specification See: Pinout Values and Diagnostic Parameters
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See the relevant wiring diagram for information about circuits and ground terminals in the bodywork.
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Checking wiring and terminals See: Testing and Inspection/Component Tests and General Diagnostics/Checking Wiring and Terminals
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Description Of Parameters
Description of parameters
Parameters, value
Power supply, value
Measurement range 6 - 20 V.
Indicates the power supply to the headlamp control module (HCM).
The normal value when the alternator is charging: 13.0-14.5 V.
Steering wheel angle, value
Measurement range: -780 to +780°.
Indicates current steering wheel angle.
The normal value when the steering wheel and front wheels point straight ahead is approx. 0°.
Front position sensor, value
Measurement range: 0 to +5 V.
Indicates sensor signal for front position sensor.
The normal value when the vehicle is on a flat surface and is unladen is approx. +2.5 V.
Rear position sensor, value
Measurement range: 0 to +5 V.
Indicates sensor signal for rear position sensor.
The normal value when the vehicle is on a flat surface and is unladen is approx. +2.5 V.
Voltage supply, sensor 5 V
Voltage supply to position sensors. Normal value is +5 V.
Description Of Reading Off Of Extended Diagnostic Trouble Code (DTC) Information
Description of reading off of extended diagnostic trouble code (DTC) information
Select type of description:
Description of frozen values See: Scan Tool Testing and Procedures/Description Of Frozen Values, HCM
Description of status identifier See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/Description Of Status Identifier
Description of counter See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
