Scan Tool Testing and Procedures

CHECK COMMUNICATION FUNCTION

a. Check the battery voltage.
Standard: 10 - 14 V

b. Inspect the diagnosis trouble code output.
1. Check a diagnosis trouble code concerning the instrument panel junction block assembly (body ECU) by connecting the hand-held tester to the DLC3 and turning the ignition switch ON.

HINT:
- When diagnostic trouble code check is impossible, check the Diagnostic Trouble Code Chart.
- The display shows communication error (refer to new diagnosis system and the operations when an error occurred).

2. When the display shows diagnostic trouble codes concerning the ECU unconnected and the communication bus defective, perform the inspection depending on the troubleshooting procedures.

HINT: When another diagnostic trouble code is output, refer to the diagnostic trouble code table and check the applicable section.