Diagnostic Test

CHECK FOR ACTIVE DTC
NOTE:
Verify the connection of the ANC Microphone 1 harness connector.
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - 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. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE ANC MICROPHONE 1
1. Turn the ignition off.
2. Disconnect the ANC Microphone 1 harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  NOTE:
  B143B-13-ANC MICROPHONE 1-CIRCUIT OPEN should display as active as a result of this test.
  
  Does the scan tool display: B143B-2B-ANC MICROPHONE 1-WIRES SHORTED TOGETHER as active?
  
  Yes
  - Go To 3
  No
  - Replace the ANC Microphone 1 in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (X460) ANC MICROPHONE 1 (+) AND THE (X461) ANC MICROPHONE 1 (-) CIRCUITS FOR A SHORT TOGETHER
1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Check for continuity between the (X460) ANC Microphone 1 (+) circuit, and the (X461) ANC Microphone 1 (-) circuit.
  Is there continuity between the (X460) ANC Microphone 1 (+) circuit, and the (X461) ANC Microphone 1 (-) circuit?
  
  Yes
  - Repair the (X460) ANC Microphone 1 (+) and the (X461) ANC Microphone 1 (-) circuits for a short together.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Amplifier in accordance with the Service Information. Refer to AMPLIFIER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .