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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 367 (Audio (Radio) - Electrical Diagnostics - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> B143A-12-Microphone 1 - Circuit Short To Battery >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    Verify the connection of the inside rearview mirror harness connector.

    1. Ignition on, engine not running.
    2. With the scan tool, read the DTCs.

      Does the scan tool display: B143A-12-MICROPHONE 1 - CIRCUIT SHORT TO BATTERY as active?

      Yes 

      • Go To  2

      No 

      • Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  2. CHECK THE INSIDE REARVIEW MIRROR 
    1. Turn the ignition off.
    2. Disconnect the Inside Rearview Mirror harness connector.
    3. Ignition on, engine not running.
    4. Wait 10 seconds.
    5. With the scan tool, read the active DTCs.

      Does the scan tool display: B143A-12-MICROPHONE 1 - CIRCUIT SHORT TO BATTERY as active?

      Yes 

      • Go To  3

      No 

      • Replace the Inside Rearview Mirror in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. CHECK THE (X712) MICROPHONE 1 IN (+) CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Radio connector.
    3. Ignition on, engine not running.
    4. Measure the voltage between the (X712) Microphone 1 IN (+) circuit and ground.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (X712) Microphone 1 IN (+) circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. CHECK THE (X792) MICROPHONE 1 IN (-) CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Measure the voltage between the (X712) Microphone 1 IN (+) circuit and ground.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (X792) Microphone 1 IN (-) circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Radio in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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