Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DTC
NOTE:
Verify the connection of the Microphone harness connector in the headliner.
1. Turn the ignition on.
2. With the scan tool, read the active DTCs.
  Does the scan tool display: B143A-1A -MICROPHONE 1 - CIRCUIT RESISTANCE BELOW THRESHOLD?
  
  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 BODY VERIFICATION TEST .
CHECK THE MICROPHONE
1. Turn the ignition off.
2. Disconnect the Microphone harness connector.
3. Turn the ignition on.
4. With the scan tool, read the active DTCs.
  NOTE:
  B143A-1A -MICROPHONE 1 - CIRCUIT RESISTANCE BELOW THRESHOLD should display as active as a result of this test.
  
  Does the scan tool display: B143A-1A -MICROPHONE 1 - CIRCUIT RESISTANCE BELOW THRESHOLD as active?
  
  Yes
  - Go To 3
  No
  - Replace the Microphone in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (X712) MICROPHONE 1 IN (+) AND THE (X792) MICROPHONE 1 IN (-) CIRCUITS FOR A SHORT TOGETHER
1. Turn the ignition off.
2. Disconnect the RADIO harness connector.
3. Measure the resistance between the (X712) Microphone 1 IN (+) circuit, and the (X792) Microphone 1 IN (-) circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (X712) Microphone 1 IN (+) and the (X792) Microphone 1 IN (-) circuits for a short together.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the RADIO in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .