Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read the Body Control Module (BCM) DTCs and record on the repair order.
  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 INSIDE REAR VIEW MIRROR
1. Turn the ignition off.
2. Disconnect the Inside Rear View Mirror harness connector.
3. Turn the ignition on.
4. Wait 10 seconds.
5. With the scan tool, read the BCM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Replace the Interior Rearview Mirror in accordance with the Service Information. Refer to MIRROR, REARVIEW, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE LIGHT RAIN SENSING MODULE (LRSM)
1. Turn the ignition off.
2. Disconnect the LRSM harness connector.
3. Turn the ignition on.
4. Wait 10 seconds.
5. With the scan tool, read the BCM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 4
  No
  - Replace the Light Rain Sensing Module in accordance with the service information. Refer to MODULE, LIGHT RAIN SENSOR, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE HUMIDITY SENSOR
1. Turn the ignition off.
2. Disconnect the Humidity Sensor harness connector.
3. Turn the ignition on.
4. Wait 10 seconds.
5. With the scan tool, read the BCM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 5
  No
  - Replace the Humidity Sensor in accordance with the Service Information. Refer to SENSOR, HUMIDITY, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D402) LIN BUS 2 CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the BCM C7/G harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (D402) LIN Bus 2 circuit at the BCM C7/G harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage on the (D402) LIN Bus 2 circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 6
CHECK THE (D402) LIN BUS 2 CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Check for continuity between ground and the (D402) LIN Bus 2 circuit at the BCM C7/G harness connector.
  Is there continuity between ground and the (D402) LIN Bus 2 circuit?
  
  Yes
  - Repair the short to ground in the (D402) BCM LIN Bus 2 circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .