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TROUBLESHOOTING MULTIPORT FUEL INJECTION (MPI) <4G1> 13B-37 Code No. P0105: Barometric Pressure Sensor System FUNCTION • The barometric pressure sensor converts the bar- ometric pressure to a voltage signal and inputs • In response to the signal, the engine-ECU cor- rects the fuel injection amount, etc. TROUBLE JUDGEMENT Check Conditions • 2 seconds later from when ignition switch is in ON position • Battery voltage is more than 8.0 V. Or • 2 seconds later from when engine starts • Battery voltage is more than 8.0 V. Judgement Criterion • Sensor output voltage is less than 0.2 V for 4 sec- onds. Or • Sensor output voltage is more than 4.5 V for 4 seconds. PROBABLE CAUSE • Failed barometric pressure sensor DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III diagnosis code • Reconfirmation of diagnosis code Q: Is the diagnosis code output? YES : Replace engine-ECU. NO : Intermittent malfunction (Refer to GROUP − How to Use Troubleshooting/Inspection Service Points − How to Cope with Intermittent Malfunctions ). Main Index Group TOC |