The Tech 1 numeric keypad is used to enter information and navigate through the diagnostic procedures. Key functions are described below: • YES/NO keys. These…
The Tech 1 consists of the following elements (figure 6-14): • A display screen where information and instructions can be read. The display area is…
The PCM is continually monitoring and communicating with the different electronic systems of the vehicle. It monitors input data from sensors and uses this data…
Intermittent conditions can be especially difficult to isolate. Use the following procedure for diagnosing intermittents. 1. Most intermittent problems are caused by faulty electrical connection…
Three diagnostic approaches can be used to solve driveability problems: code-based diagnostics, symptom-based diagnostics, and system-based diagnostics. Each has a specific purpose and should only…
A diagnostic strategy (figure 6-12) is simply an organized process of elimination. It directs you to look for the simplest cause to a problem first,…
The MIL in the instrument cluster alerts the vehicle operator to driveability problems requiring service. The lamp illuminates and stays illuminated under most DTC conditions.…
Several other on-vehicle items aid in diagnostics. Data Link Connector (DLC) The Data Link Connector (DLC) is located under the left side of the instrument…
Diagnostic “Scan” tools are the most versatile and effective way to isolate circuit faults, identify improper component operation, and otherwise troubleshoot the electrical circuits of…
Test lights are used to check for voltage and continuity. There are two types: self-powered and non self-powered (figure 6-7). Self-Powered Test Light The self-powered…