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 BATTERY CHARGE
1. Check the correct battery charge status by connecting the Midtronics GR8 Battery Tester or an equivalent Battery tester.
  Is the Battery properly charged?.
  
  Yes
  - Go to 3.
  No
  - Recharge or replace the battery. Refer to BATTERY, REMOVAL AND INSTALLATION .
CHECK LEFT BLIND SPOT SENSOR POWER SUPPLY FUSE STATE
1. Check the operation of the 7.5 A power supply fuse F49 on the Left Blind Spot Sensor.
  Is the Fuse open?
  
  Yes
  - Replace the 75 A fuse F49 after having found the cause of malfunction.
  No
  - Go to 4.
CHECK (F926) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (F926) Fused Ignition Switch Output (Run) circuit between the BCM C5 connector and the LBSS connector
  Is the resistance above 3.0 ohms?
  
  Yes
  - Repair the (F926) Fused Ignition Switch Output (Run) circuit for an open or high resistance.
  No
  - Go to 5.
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.