Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  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 and repair as necessary. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(F923) RUN RELAY CONTROL CIRCUIT OPEN
1. Disconnect the Left Blind Spot Sensor (LBSS) harness connector.
2. Turn the ignition on.
3. With a 12-volt test light connected to ground, check the (F923) Run circuit at the LBSS harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the (F923) Run circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(Z922) GROUND CIRCUIT(S) OPEN
1. Turn the ignition off.
2. With a 12-volt test light connected to 12 volts, check the (F923) RUN circuit at the LBSS harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the (Z922) Ground circuit(s) for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D264) AND (D265) CAN IHS BUS CIRCUITS FOR AN OPEN
1. Turn the ignition on.
2. Measure the resistance of the (D264) CAN IHS Bus (-) circuit between the Rear CAN IHS Star Connector C4 harness connector and the LBSS harness connector
3. Measure the resistance of the (D265) CAN IHS Bus (+) circuit between the Rear CAN IHS Star Connector C4 harness connector and the LBSS harness connector.
  Is resistance below 3.0 Ohms on both circuits?
  
  Yes
  - Replace the Left Blind Spot Sensor in accordance with the Service Information. Refer to SENSOR, BLIND SPOT, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (D265) or (D264) CAN IHS Bus circuit for an open. Inspect the connector for damage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .