Checking the cable

Fig 1: Identifying Ignition Switch ON Position

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Fig 2: Identifying Connector(s) Reinstallation

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• Ignition off
• Disconnect the connector for the climate control module (CCM).
• Ignition on.

  Check LIN bus 1. Check for a short-circuit to supply voltage.

  Take a reading on the connector for the climate control module (CCM) between terminals #12 (#36) and #1 (#25).

  If there is a short-circuit to supply voltage in LIN bus 1, continue fault-tracing by locating where the short-circuit has occurred as follows:

  • Disconnect the connector on the climate control unit that connects LIN bus 1 from the climate control module (CCM) to other components on the climate control unit
  • Check the section of LIN bus 1 that connects the climate control module (CCM) to the left-hand seat heating module (SHM) and the connector on the climate control unit. Take a reading on the connector for the climate control module (CCM) between terminals #12 (#36) and #1 (#25).

  If the fault persists, fault-trace LIN bus 1 between the climate control module (CCM), the left-hand seat heating module (SHM) and the connector for the climate control unit. Check for a short-circuit to supply voltage.

  If the fault is no longer present, fault-trace LIN bus 1 between the connector and the components of the climate control unit. Check for a short-circuit to supply voltage.

  Remedy as necessary.

  Other information: 

  • Connecting the breakout box.
  • Signal specification.
  • Climate control, location of components.
  • Climate control module (CCM), replacing.
  • Seat heating module (SHM), replacing.
  • Contents.
  Fig 3: Identifying 16-Pin Connector

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to Verification. 

• NO 

  Refer to Checking the cable. 

Fig 1: Identifying Ignition Switch OFF Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Disconnect the connector for the climate control module (CCM).

  Check LIN bus 1. Check for a short-circuit to ground.

  Take a reading on the connector for the climate control module (CCM) between terminals #12 (#36) and #16 (#40).

  If there is a short-circuit to ground in LIN bus 1, continue fault-tracing by locating where the short-circuit has occurred as follows:

  • Disconnect the connector for the climate control unit that connects LIN bus 1 from the climate control module (CCM) to the other components on the climate control unit.
  • Check the section of LIN bus 1 that connects the climate control module (CCM) to the left-hand seat heating module (SHM) and the connector on the climate control unit. Take a reading on the connector for the climate control module (CCM) between terminals #12 (#36) and #16 (#40).

  If the fault persists, fault-trace LIN bus 1 between the climate control module (CCM), the left-hand seat heating module (SHM) and the connector for the climate control unit. Check for a short-circuit to ground.

  If the fault is no longer present, fault-trace LIN bus 1 between the connector and the components of the climate control unit. Check for a short-circuit to ground.

  Remedy as necessary.

  Other information: 

  • Connecting the breakout box.
  • Signal specification.
  • Climate control, location of components.
  • Climate control module (CCM), replacing.
  • Seat heating module (SHM), replacing.
  • Contents.
  Fig 2: Identifying 16-Pin Connector

  Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification.