Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read LBSS DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. Turn the ignition on.
4. With the scan tool, read LBSS DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION.
CHECK THE VOLTAGE OF THE MIRROR LED CONTROL CIRCUIT
1. Turn the ignition off.
2. Disconnect the LBSS harness connector.
3. Disconnect the Left Sideview Mirror harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the Mirror LED Control circuit at the LBSS harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the Mirror LED Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
  No
  - Go To 3
CHECK THE MIRROR LED CONTROL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Measure the resistance of the Mirror LED Control circuit between the LBSS harness connector and the BCM harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the open or high resistance in the Mirror LED Control circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all LBSS harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all LBSS harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read LBSS DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Left Blind Spot Sensor (LBSS) in accordance with the Service Information. Refer to SENSOR, BLIND SPOT, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST.
  - Test complete.