Measuring ECU Terminal Values W/Toyota Break-Out Box

Using LEXUS break-out-box and LEXUS hand-held tester, measure the ECU terminal values.

1. Turn the ignition switch OFF.
2. Hook up the LEXUS break-out-box and LEXUS hand-held tester to the vehicle.
3. Turn the ignition switch ON.
4. Read the ECU input/output values by following the prompts on the tester screen.

HINT:
- LEXUS hand-held tester has a "Snapshot" function. This records the measured values and is effective in the diagnosis of intermittent problems.
- Please refer to the LEXUS hand-held tester/LEXUS break-out-box operator's manual for further details.