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 (F925) RUN RELAY OUTPUT CIRCUIT FOR VOLTAGE
1. Turn the ignition off.
2. Disconnect the Interior Rearview Mirror harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (F925) Run Relay Output circuit at the Interior Rearview Mirror harness connector.
  Is the voltage above 10.0 volts?
  
  Yes
  - Go To 3
  No
  - Repair the open or short to ground in the (F925) Run Relay Output circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Z910) GROUND CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Measure the resistance between ground and the (Z910) Ground circuit at the Interior Rearview Mirror harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (Z910) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D402) LIN BUS 2 CIRCUIT FOR VOLTAGE
1. Turn the ignition on.
2. Measure the voltage between ground and the (D402) LIN BUS 2 circuit at the Interior Rearview Mirror harness connector.
  Is the voltage above 5.0 volts?
  
  Yes
  - 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 .
  No
  - Go To 5
CHECK THE (D402) LIN BUS 2 CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the BCM C7/G harness connector.
3. Measure the resistance of the (D402) LIN Bus 2 circuit between the Interior Rearview Mirror harness connector and the BCM C7/G harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the open in the (D402) 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 .