Faulty Signal. Permanent Fault
Faulty signal. Permanent fault
Checking for air leakage in the intake system
Check for air leakage in the intake system according to intake system/leak test Intake System/Leak Test.
Remedy as necessary.
Was there any air leakage?
Yes - Fault-tracing information
No - Checking for air leakage in the exhaust system
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Checking for air leakage in the exhaust system
Check for air leakage in the exhaust system.
Remedy as necessary.
Was there any leakage?
Yes - Fault-tracing information
No - Checking fuel and residual pressures
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Checking fuel and residual pressures
Check the fuel pressure and residual pressure.
Remedy as necessary.
Was the pressure OK?
Yes - Checking the compression
No - Fault-tracing information
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Checking the 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.
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 Found Fault-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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the engine:
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FAULT FOUND - Fault-tracing information
No Fault Found - Replacing the component
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Replacing the component
- Try a new three-way catalytic converter (TWC). Replace according to Three-way catalytic converter (TWC), replacing Three-Way Catalytic Converter (TWC), Replacing.
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
In case of this defect, troubleshooting is not followed by verification.
The information can be displayed again or the fault-tracing for this fault can be interrupted.
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Checking for air leakage in the intake system
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