- lör 09 jul 2016, 16:40
#1092067
VIDA 2014D kan berätta följande:
284: ECM-P003A85 Turbocharger/Supercharger Boost Control A Position Exceeded Learning Limit. Bus Signal / Message Failures. Signal above allowable range
Diagnostic trouble code (DTC) information ECM-P003A85
Condition
Engine control module (ECM) controls angling of the guide rails, based on a signal from the turbo position sensor. Over time the control module calculates new adaption values, that is the maximum and minimum permitted angle of the guide rails. Engine control module (ECM) checks continuously if the new adaptation values for the turbo position sensor deviate more than permitted from the factory adaptation or adaptation performed with diagnostics tool.
The diagnostic trouble code (DTC) is stored if the control module detects that:
Engine control module (ECM) discovers that permitted adaptation limit is exceeded.
The diagnostic trouble code (DTC) can be diagnosed when:
Idle lasts more than 65 seconds.
Brake pedal unaffected.
Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.
Substitute value
No adaptation values are used.
Possible source
Vacuum hose for turbo control has cracked or come loose.
The turbo position sensor does not show correct position.
The mechanism for angling the guide rails has jammed.
Fault symptom[s]
Driving/Poor performance/lacks power
Fault-tracing
Checking the connectors and hose connector
Check vacuum hoses and connections to/from the turbocharger (TC) control valve (VNT regulator) for blockages, condensation and dirt.
Check the hose for vacuum control of the turbo for cracks or leakage. Also check that the hose has not come loose.
Check that the turbocharger (TC) control valve (VNT regulator) functions and does not jam.
Troubleshoot the turbocharger for mechanical defects for angling the guide rails.
Note! If troubleshooting results in replacement of turbocharger, the turbo system must be adapted.
Troubleshoot the turbo position sensor for electrical faults, that is, short-circuiting to voltage/ground, loose connection, open circuit, or oxidation in connections. Check the voltage supply.
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