F0: DATA LIST
| No. | Tech 1 Display | Conditions for checking | Nominal value | Trouble Codes | Terminal |
|---|---|---|---|---|---|
| 43 | KNOCK RETARD | Engine running at idle speed, operating temperature | 0 °CA | ||
| Depress accelerator pedal briefly to full load stop (accelerate fully) | greater than 0 5CA |
Note:
| This test will only function if the accelerator pedal is depressed briefly to full load stop once, not several times in a row. |
Note:
Test step 43 displays the ignition retard in the event of knocking combustion.
In these cases, a statement can be made about:
· Poor fuel quality (octane rating too low):
· Carbon deposits (deposits on piston head and valves):
· Extreme short distance operation (cause of carbon deposits)
Possible remedies:
· Change fuel brand
· Check compression
The knock control is monitored / checked by the control unit self - diagnosis and can only be simulated in operation under extreme conditions and with some difficulty.
On fault recognition, the control unit retards the firing angle by 10 °CA for reasons of safety to avoid damage to the engine.
| Troubleshooting | Nominal value | Cause of Fault |
|---|---|---|
| · See test step 08 |