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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> (Audio (Radio) (ETM) - Electrical Diagnostics) >> DTC Troubleshooting >> B210A-16 - System Voltage Low - Circuit Voltage Above Threshold >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
    3. With the scan tool, read the RADIO/ETM DTCs.

      Is the DTC active?

      Yes 

      • Go to 2.

      No 

  2. CHECK THE BATTERY VOLTAGE TO THE RADIO WITH THE SCAN TOOL 
    1. With the scan tool in Data Display, read the Radio battery voltage.

      Is the battery voltage less than 9.0 volts?

      Yes 

      • Go To  3

      No 

      • Replace the Radio in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  3. CHECK THE BATTERY VOLTAGE TO THE RADIO 
    1. Disconnect the Radio harness connector.
      NOTE:

      Check the Radio harness connector for signs of corrosion, pushed out or bent terminals, and correct pin tension.

    2. Measure the voltage between ground and the Fused B+ circuit at the Radio C1 harness connector.

      Is the battery voltage less than 9.0 volts?

      Yes 

      • Go To  4

      No 

      • Go to 6.
  4. CHECK RADIO GROUND 
    1. With a 12-volt test light connected to 12 volts, check the Ground circuit at the Radio C1 harness connector.
      NOTE:

      The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

      Does the test light illuminate brightly?

      Yes 

      • Go To  5

      No 

      • Repair the open or high resistance on the Ground circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  5. CHECK FOR CHARGING SYSTEM RELATED DTCS IN THE POWERTRAIN CONTROL MODULE (PCM) 
    1. With the scan tool in ECU View, select PCM and check for any Charging System related DTCs.

      Does the scan tool display any Charging System related DTCs?

      Yes 

      • Refer to DTC INDEX and perform the appropriate charging system or battery DTC diagnostic procedure.

      No 

  6. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all RADIO/ETM Module harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Reconnect all RADIO/ETM Module harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read RADIO/ETM Module DTCs.

      Did the DTC return?

      Yes 

      No 

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