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4 CHECK FUEL PRESSURE 1. Release fuel pressure to zero. Refer to EC-39. At idling: When fuel pressure regulator valve vacuum hose is connected. 235 kPa (2.4 kg/cm 2 , 34 psi) When fuel pressure regulator valve vacuum hose is disconnected. 294 kPa (3.0 kg/cm 2 , 43 psi) OK or NG OK © GO TO 6. NG © GO TO 5. 5 DETECT MALFUNCTIONING PART Check the following. I Fuel pump and circuit (Refer to EC-625.) I Fuel pressure regulator (Refer to EC-40.) © Repair or replace. 6 CHECK MASS AIR FLOW SENSOR With CONSULT-II 1. Install all removed parts. 2.0 - 6.0 g·m/sec: at idling With GST 1. Install all removed parts. 2.0 - 6.0 g·m/sec: at idling OK or NG OK © GO TO 7. NG © Check connectors for rusted terminals or loose connections in the mass air flow sensor GI MA EM LC FE AT TF PD AX SU BR ST RS BT HA SC EL IDX DTC P0172 (RIGHT, -B1), P0175 (LEFT, -B2) FUEL INJECTION SYSTEM FUNCTION (RICH) Diagnostic Procedure (Cont’d) EC-307 |