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Circuit / System Testing

Circuit / System Testing DTC B1D73 49, 87

  1. Ignition / Vehicle - Off
  2. Disconnect the P16 Instrument Panel Cluster Control Module harness connector.
  3. Verify a test lamp illuminates between the ground circuit terminal 8 and B+.
    • If the test lamp does not illuminate 

      Repair the open / high resistance in the ground circuit.

    • Go to next step: If the test lamp illuminates 
  4. Ignition ON / Vehicle In Service Mode.
  5. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Test for an open / high resistance in the B+ circuit.
      • If an open / high resistance is found, repair the fault in the circuit.
      • Go to next step: If an open / high resistance is not found
    2. Verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Test for a short to ground in the B+ circuit.
      • If a short to ground is found, repair the fault in the circuit.
      • Go to next step: If a short to ground is not found
    2. Replace the P16 Instrument Panel Cluster Control Module.
    • Go to next step: If the test lamp illuminates 
  6. Verify the USB cable is properly connected at all components and in-line connections, and there is no damage to the cable or connections.
    • If connection problems or cable damage is noted. 

      Perform the appropriate repair or replacement to correct any issues.

    • Go to next step: If no connection problems or cable damage is noted. 
  7. Replace the USB cable.
  8. Ignition - On / Vehicle - In Service Mode
  9. Verify DTC is not set.
    • If DTC sets 
    1. Replace the P16 Instrument Panel Cluster Control Module.
    2. Verify the DTC is not set.
      • If DTC sets 

        Replace the A11 Radio.

      • Go to next step: If DTC is not set 

        Go to next step: All OK

    • Go to next step: If DTC is not set 
  10. All OK

Circuit / System Testing B1D73 4, 98

  1. Ignition ON / Vehicle In Service Mode.
  2. Verify the DTC is not set.
    • If DTC is set 

      Replace the component: P16 Instrument Panel Cluster Control Module

    • Go to next step: If DTC is not set 
  3. All OK
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