Title: Diagnose (troubleshoot) the causes of incorrect operation of warning devices and other driver information systems; determine the needed action.
Course: Automotive Technology III (20104-III) > Section: ELECTRICAL/ELECTRONIC SYSTEMS: Instrument Cluster and Driver Information Systems Diagnosis and Repair

Diagnosis should include

- inspecting, testing, and replacing the oil temperature and pressure switches and sensors
- checking the operation of the parking brake indicator light system
- checking the operation of the brake stop light system and adjusting and servicing, as needed
- inspecting and testing gauges and gauge-sending units and replacing, as needed
- inspecting and testing connectors, wires, and printed circuit boards of gauge circuits and repairing or replacing, as needed
- diagnosing the incorrect operation of warning devices and other driver information systems
- diagnosing intermittent, high, low, or no readings on electronic instrument clusters
- inspecting and testing sensors, sending units, connectors, and wires of electronic instrument circuits and repairing or replacing, as needed.

The technician must use related service materials and follow manufacturer guidelines. (Note: Typically, digital and fiber optic gauges and warning circuits are not serviceable by the automotive service technician, but they are sent to special repair centers when servicing is required.)

Process/Skill Questions:

- What might be the cause of a constantly illuminated brake warning light?
- What is a driver information center?
- What might happen to the brakes if the anti-lock braking system (ABS) warning light is illuminated?