| Test requirements for checking turbocharging system |
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| Fault memory of engine control unit interrogated. |
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| Exhaust gas recirculation system OK, checking → Chapter. |
Note | Reliable values cannot be obtained when checking turbocharger system if the exhaust gas recirculation system is defective. |
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| No leaks in the intake and exhaust systems. |
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| No leaks in vacuum hoses. |
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| Vacuum pipe to charge pressure regulating valve not obstructed, loose or leaking. |
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| No faults on engine or injection system (e.g. compression pressure/commencement of injection or injectors). |
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