Checking Compression

Checking the engine:

Checking the engine:




- Ignition off
- Disconnect system relay 2/14
- Remove spark plugs.
Check the compression at wide open throttle (WOT).
In particular, check for uneven compression between the cylinders.

Note! Compression testing should always be carried out at wide open throttle (WOT) and with the engine at operating temperature. Diagnostic trouble codes (DTCs) ECM-24 and ECM-A3 will be stored because the system relay is disconnected.





Is the compression OK?

Yes - No Fault Found

No - Engine repairs

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Engine repairs
Carry out the repair required to the engine.

Press "Continue" when the fault has been repaired.

Continue - Verification

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Verification

Hint: Check after repair that the fault has been rectified.

- Reinstall system relay 2/14.
Start the engine and check that idle speed runs evenly.









Is idle speed even?

Yes - FAULT FOUND

No - No Fault FoundFault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the engine:

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