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9.5 ME - SFI (ME1.0)   >  12 Diagnosis - Complaint Related Diagnostic Chart - Injection/Ignition

Complaint/Problem Possible cause Test step/Remedy 1) Actual value Engine test Menu item Engine starts and accelerates poorly when cold Injector (Y62) activation and injection duration. Hot film MAF sensor (B2/5). ECT sensor (B11/4). Ignition voltage too low. Intake air leak. 23 17.0 - 24.0 23 4.0 - 5.0 23 8.0 24 30.0 Remedy leak. 2/7 1/7 3/7 - - Engine does not start No voltage supply from base module (N16/1). Malfunction of drive authorization system (DAS) . Fuel pumps defective. No compression, oil pressure too high. Ignition voltage too low. 23 1.0 - 3.0 23 37.0 34 2.0 check compression and oil pressure. 24 30.0 - DAS 1/1 - - - Engine has uneven idle Camshaft timing. Injector (Y62) activation and injection duration. Intake air leak. 23 27.0 - 30.0 23 17.0 - 24.0 Remedy leak. 2/7 2/7 - Engine has insufficient output TWC flow restricted. Left or right O2S 1 (G3/3 or G3/4) (before TWC). ECT sensor (B11/4). Hot film MAF sensor (B2/5). Camshaft timing. Check exhaust back pressure, see DM, Engines, Vol. 1, section A, "Engine Output" 23 11.0 - 12.0 23 8.0 23 4.0 - 5.0 23 27.0 - 30.0 - 5/7 3/7 1/7 2/7 Engine runs unevenly (shakes) Injector (Y62) activation and injection duration. Injector leaking, poor spray pattern. Left or right O2S 1 (G3/3 or G3/4) (before TWC). Ignition voltage too low. Compression on one or more cylinders too low. Intake air leak. 23 17.0 - 24.0 36 1.0 23 11.0 - 12.0 24 30.0 Check compression. Remedy leak. 2/7 - 5/7 - - - Engine runs unevenly (misfiring) Ignition voltage too low. Hot film MAF sensor (B2/5). 24 30.0 23 4.0 - 5.0 - 1/7 Engine surges after cold start Intake air leak. Remedy leak. - Transition failure during warm-up ECT sensor (B11/4). Hot film MAF sensor (B2/5). Intake air leak. 23 8.0 23 4.0 - 5.0 Remedy leak. 3/7 1/7 - Transition failure when warm or high fuel consumption Left or right O2S 1 (G3/3 or G3/4) (before TWC). Purge control valve (Y58/1) stuck in open position. 23 11.0 - 12.0 23 31.0 5/7 3/7 Engine vibrates Hot film MAF sensor (B2/5). Ignition voltage too low. Left or right O2S 1 (G3/3 or G3/4) (before TWC). 23 4.0 - 5.0 24 30.0 23 11.0 - 12.0 1/7 - 5/7 EPC MIL (A1e43) illuminates and EA is in "limp-home" mode Nominal value potentiometer in pedal value sensor (B37). EA/CC/ISC actuator actual value potentiometer. 25 4.0 - 5.0 25 6.0 - 7.0 4/7 4/7 1) Observe Preparation for Test, see 22 .