Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC 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 FOR VOLTAGE ON THE (F925) RUN RELAY CONTROL CIRCUIT
1. Turn the ignition off.
2. Disconnect the Humidity Sensor harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (F925) Run Relay Control circuit at the Humidity Sensor harness connector.
  Is the voltage above 9.0 volts?
  
  Yes
  - Go To 3
  No
  - Repair the open or short to ground in the (F925) Run Relay Control 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 Humidity Sensor 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 Humidity Sensor harness connector.
  Is the voltage above 5.0 volts?
  
  Yes
  - 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 .
  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 2 Bus circuit between the Humidity Sensor 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 .