Work procedure
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CAUTION:
To reduce the risk of accident during road tests, always observe safety precautions. See SAFETY PRECAUTIONS
.
- Connect diagnostic tester. See CONNECT DIAGNOSTIC TESTER .
- Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.
The following operating conditions must be met during this road test:
- Engine speed 1800 to 2200 RPM; "PID 12: Engine rotations per minute". See MODE 1: CHECK MEASURED VALUES .
- Vehicle speed constant 90 km/h; "PID 13: Vehicle speed". See MODE 1: CHECK MEASURED VALUES .
- Let engine run at idle.
- In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
- Select the "Test-ID 01: Catalytic converter".
- Check specified values at idle.
NOTE:
Bank 1 = cylinder bank 1 in direction of travel, right; Bank 2 = cylinder bank 2 in direction of travel, left.
CATALYTIC CONVERTER SPECIFIED VALUES
| Catalytic converter | Specified value max. |
|---|---|
| Bank 1 | 0.250 |
| Bank 2 | 0.250 |
- End diagnosis and switch ignition off.
If the specified values are exceeded:
- Replace the respective front exhaust pipe with catalytic converter:
- Left front exhaust pipe. See LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING .
- Right front exhaust pipe. See RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING .