On-Off Ratio Test

Test Values
- Controlled on-off ratio - 30-70%

Special Tools

Oil Telethermometer - 116 589 27 21 00:

^ Lambda closed loop tester - 909 589 00 21 00

Test Conditions:
- Ignition system must be in good working order and engine at idle speed.
- Ignition timing must be set to specification.

NOTE: The Lambda control system and O2 sensor are functioning properly if the lambda closed loop tester needle oscillates or does not oscillate at a constant engine rpm, but reacts to brief engine speed accelerations.

L��Test Procedure:

- Follow test procedure shown in image.