C-14, Engine-Compression
| C-14, Engine-Compression | ||
|---|---|---|
| Test | Work Order Description | Nominal Value |
| T01 | Check: Component | |
| Select and enable diagnostic tester control test: INJ.CONTROL Refer to B-8 F8: ECU CONTROL TEST Test01 INJ.CONTROL Note: This test helps to analyse engine compression. All fuel injectors are cut off one after another. Each time an injection valve is cut off, the engine must move the corresponding piston against the compression pressure. This leads to a reduction in torque and performance, and engine speed drops accordingly. The engine speed reduction must be identical for each injector, since the compression of all cylinders is nearly the same as long as the system is working properly. The electronic control of the engine immediately responds to the disabled cylinder by increasing the injection time of the remaining injectors and by opening the idle air controller. In order to avoid this, the spark angle and the idle air controller position are adjusted to a fixed value. Engine speed is increased to approximately 1200 rpm, with oxygen sensor closed loop control working normally. | Test okay? | |
| Yes: E01 | No: E02 |
| C-14, Engine-Compression | |
|---|---|
| Result | Cause Of Fault |
| E01 | Test okay. |
| E02 | The engine-compression has to be checked refering to Service Manual. |