BAR Smog Repair Online Test Prep

Study Guide for the California Smog License Repair Technician Exam 

The purpose of this study guide is to help you prepare for the California Smog License Repair Technician Exam.

This guide addresses current diagnostic and repair procedures. Rather than memorize information, the purpose of this guide is to help the Technician understand the procedures to follow to perform a successful diagnosis and repair, and how to properly advise customers of their rights and obligations.

Along with the correct answers to each question, this guide also offers detailed explanations to the questions, along with references to the pertinent sections of the Smog Check Reference Guide (SCRG), the Smog Check Inspection Manual (SCIM), and the Write it Right Guide.

This study guide covers the following modules from the State exam:

• Discharging Obligations to Customers

• Diagnosing Test Failures

• Performing Repairs

• Composite Vehicle


• Smog Check Inspection Manual (2013)

• Smog Check Reference Guide (2018)

• Write It Right Guide

• Advanced Engine Performance Diagnosis, 5th Edition, James Halderman

• Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, 6th Edition, James Halderman

All rights reserved. No part of this material may be reproduced in any form, electronic or mechanical, without the written consent of the author(s).

Author L. E. Ferro

Editing Matt Bartlett

STI Smog Tech Institute -2019-

*In Memoriam of S. Myron Maurseth CIAT California Institute of Auto Technology

All efforts have been made to make this material as accurate as possible. STI cannot be held responsible for any damages caused by the use of this material.

*This guide is dedicated to the memory of the late S. Myron Maurseth, who first envisioned the idea of creating a study guide to help prospective Smog Inspectors and Repair Technicians prepare for the California Smog License Exam. Myron’s original material has been edited and updated, and new written material completes the guide to meet the most current computerized systems diagnostics and repair procedures. L. E. Ferro
Copyright@2018 STI Version 1.0 Smog Check Repair Technician Guide