Diagnostic Aids
- Always diagnose the first DTC that is listed on the scan tool.
- Verify that the scan tool displays DTC B2600 as a current code before you perform diagnostics.
- The scan tool can command the DRL relay ON.
This test is located under the Special Functions menu.
- Compare the state of the DRL relay as indicated on the scan tool with the actual state of the DRL relay.
- Test for an inoperative high beam headlamp.
- Use an incandescent shop light or a flashlight.
Direct the lighting toward the light sensor in order to force the light sensor into a LIGHT state.
- Inspect for loose or poor connection at all of the related components. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.