Checking Components

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Disconnect connector A for the seat heating module (SHM) left
• Ignition on.

  The climate control module (CCM) has detected that a component on LIN bus 1 is transmitting incorrect data and disrupting communication on the LIN bus.

  Check the communication by disconnecting the seat heating module (SHM) left.

  If other control modules on LIN bus 1 now function, replace the seat heating module (SHM) left.

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to CHECKING COMPONENTS 

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

Fig 2: Checking Connector

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Reconnect connector A for the seat heating module (SHM)
• Ignition on.

  Check the components on the climate control unit as follows:

  • Disconnect the connectors for the components one at a time
  • Check whether the other components regain functionality, for example by activating seat heating
  • If the functionality for the other components returns, the fault is probably in the disconnected components.

  Remedy as necessary.

  Other information: 

  • see CONNECTING THE BREAKOUT BOX
  • see SIGNAL SPECIFICATION
  • see LOCATION OF COMPONENTS
  • see CLIMATE UNITS
  • see CLIMATE CONTROL MODULE (CCM)
  • see SEAT HEATING MODULE (SHM) (2010-2012)
  • see CHECKING WIRING AND TERMINALS

• Continue 

  Refer to IDENTIFYING COMPONENTS ON THE LIN NETWORK THAT BELONG TO THE CLIMATE CONTROL SYSTEM (CCM)