Title: Inspect and test gauges and gauge sensors/sending units for causes of abnormal readings; determine needed action.
Course: Automotive Technology III (20104-III) > Section: ELECTRICAL/ELECTRONIC SYSTEMS: Instrument Cluster and Driver Information Systems

Procedures should include

- inspecting, testing, and replacing 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
- diagnosing intermittent-, high-, low-, or no-gauge readings
- testing the gauge-circuit voltage regulators (limiters) and replacing, 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.

Process/Skill Questions:

- How would one describe a balancing-coil gauge system?
- How would the technician test a gauge sending unit?
- What is the purpose of the instrument voltage regulator (IVR)?