Checking For Contact Resistance And Oxidation

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Check the connectors of the brake control module (BCM) and AYC sensor for contact resistance and oxidation.
• Reinstall the components, reconnect the connectors etc.
• Test-drive the vehicle, see TEST DRIVE FORM (DSTC (DYNAMIC STABILITY AND TRACTION CONTROL) /BRAKE CONTROL MODULE), DESCRIPTION
  NOTE:

  Do not turn off the ignition between test-driving and reading out diagnostic trouble codes. This is to obtain the correct status of the diagnostic trouble codes.

• Read out the diagnostic trouble code's status without turning off the ignition after the test-drive.

  If the status of the diagnostic trouble code is intermittent, the malfunction was probably caused by contact resistance or oxidation in the connectors of the control module or AYC sensor.

  Other information 

  • see CONNECTING THE BREAKOUT BOX, BRAKE CONTROL MODULE (BCM)
  • see ACTIVE YAW CONTROL SENSOR, REPLACING
  • see CONTENTS .
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION

Is the status of the diagnostic trouble code intermittent? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  see CHECKING THE WIRING