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Home >> Saab >> 2010 >> 9-5 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Audio System With Navigation >> Fault Diagnosis, Fault Codes >> DTC B2476 04: Cellular Phone Select Service Switch Open Circuit; DTC B2476 59: Cellular Phone Select Service Switch Stuck Button; DTC B2482 00: Cellular Phone Select Service Switch Range/Performance >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the INSIDE REARVIEW MIRROR .
  2. Test for less than 5 Ω between the mirror ground circuit terminal 5 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, test for less than 1 V between the S51 Telematics Button Assembly signal circuit terminal 3 and ground.
  5. If the value is greater than the specified range, check if there is a short-circuit to voltage in the S51 signal circuit of the Telematics keypad. If the circuit test result is normal, replace the K73 telematics communication interface control module.
  6. Ignition OFF, test for 450-850 kΩ between the S51 Telematics Button Assembly signal circuit terminal 3 and ground.
  7. If the value is less than the specified range, check if there is a short-circuit to ground in the S51 signal circuit of the Telematics keypad. If the circuit test result is normal, replace the K73 telematics communication interface control module.
  8. If the value is greater than the specified range, check if there is an open circuit/high resistance in the S51 signal circuit of the Telematics keypad. If the circuit test result is normal, replace the K73 telematics communication interface control module.
  9. Ignition ON, test for 9.5-10.5 V between the S51 Telematics Button Assembly supply voltage circuit terminal 4 and ground.
  10. If less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K73 telematics communication interface control module.
  11. If greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics communication interface control module.
  12. If all circuits test normal, test or replace the button assembly.
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