Title: Inspect and test gauges and gauge 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 Diagnosis and Repair

Procedure should include

- inspecting, testing, and replacing oil temperature and pressure switches and sensors
- checking operation of parking brake indicator light system
- checking operation of brake stop light system and adjusting and servicing, as needed
- diagnosing intermittent, high, low, or no gauge readings
- testing 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 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.

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VI. Electrical/Electronic Systems
F. Instrument Cluster and Driver Information Systems Diagnosis and Repair
Task 1

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)?