Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, read the Left Blind Spot Sensor (LBSS) DTCs.
  Is the DTC active?
  
  Yes
  - Go to 2.
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION
CHECK TRAILER TOW MODULE CONNECTION
1. With the scan tool, check the status of the Trailer Tow Module (TTM).
  Is the TTM online?
  
  Yes
  - Go to 3.
  No
  - Refer to DIAGNOSIS AND TESTING and perform the NO RESPONSE FROM TTM (TRAILER TOW MODULE) diagnostic procedure.
CHECK TRAILER TOW MODULE CONNECTOR
1. Disconnect/reconnect the Trailer Tow Module connectors and check for the presence of loose pins.
  Is there a loose pin or poor connection present?
  
  Yes
  - Repair or replace the wiring connectors as necessary.
  No
  - Go to 4.
CHECK LEFT BLIND SPOT SENSOR CONNECTION
1. Disconnect/reconnect the Left Blind Spot Sensor connectors and check for the presence of loose pins.
  Is there a loose pin or poor connection present?
  
  Yes
  - Repair or replace the wiring connectors as necessary.
  No
  - Go to 5.
CHECK TRAILER TOW MODULE POWER SUPPLY
1. Check that the power supply for the Trailer Tow Module is correct.
  Is the power supply correct?
  
  Yes
  - Go to 6.
  No
  - Repair or replace the related wiring or power supply.
CHECK LEFT BLIND SPOT SENSOR POWER SUPPLY
1. Check that the Left Blind Spot Sensor power supply is correct.
  Is the power supply correct?
  
  Yes
  - Go to 7.
  No
  - Repair or replace the related wiring or power supply.
CHECK TRAILER TOW MODULE OPERATION
1. Check that the Trailer Tow Module is operating properly.
  Is the Tow hook Control Module operating properly?
  
  Yes
  - Go to 8.
  No
  - Replace the Trailer Tow Module.
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all LBSS Module 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 Module 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 Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Left Blind Spot Sensor in accordance with the Service information. Refer to MODULE, BLIND SPOT, REMOVAL AND INSTALLATION .
  - Perform the Body VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the Body VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.