Diagnostic Test
WARNING: This page is about a different car, the 2016 RAM 3500 HD and 2016 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR AN ACTIVE DTC NOTE:
Verify the connection of the Rearview Mirror harness connector.
- Turn the ignition on.
- With the scan tool, read the active DTCs.
Does the scan tool display: B143D-1A -MICROPHONE 2-CIRCUIT RESISTANCE BELOW THRESHOLD 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 BODY VERIFICATION TEST .
- CHECK THE INSIDE REARVIEW MIRROR
- Turn the ignition off.
- Disconnect the Inside Rearview Mirror harness connector.
- Turn the ignition on.
- With the scan tool, read the active DTCs.NOTE:
B143D-13-MICROPHONE 2 - CIRCUIT OPEN should display as active as a result of this test.
Does the scan tool display: B143D-1A -MICROPHONE 2-CIRCUIT RESISTANCE BELOW THRESHOLD 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 BODY VERIFICATION TEST .
- CHECK THE (X722) MICROPHONE 2 IN (+) AND THE (X723) MICROPHONE 2 IN (-) CIRCUITS FOR A SHORT TOGETHER
- Turn the ignition off.
- Disconnect the Radio harness connector.
- Measure the resistance between the (X722) Microphone 2 IN (+) circuit, and the (X723) Microphone 2 IN (-) circuit.
Is the resistance below 10K Ohms?
Yes
- Repair the (X722) Microphone 2 IN (+) and the (X723) Microphone 2 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 .