DIAGNOSTIC CODES (Cont'd) Code No. | Number of "CHECK" engine blinks | System | Diagnosis | Trouble area | See page 25 | [waveform pattern] F02662 | Air-Fuel Ratio Lean Malfunction | (Calif.) (1) When an air-fuel ratio feedback compensation value or adaptive control value continues at upper (lean) limit or at upper (rich) limit renewed for a certain period of time. (2) When an air-fuel ratio feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback control. (3) When marked variation is detected in engine speed between specific cylinder during idle switch on and feedback condition. | • Injector circuit • Injector • Fuel line pressure • Air flow meter • Air intake system • Oxygen sensor circuit • Oxygen sensor • Ignition system • Water temp. sensor • ECU | — 26 | [waveform pattern] F02663 | Air-Fuel Ratio Rich Malfunction | HINT: For conditions (2) and (3), see code neither 25 (Code No. 25) nor a rich (Code No. 26) diagnosis diagnosis consecutively. (others) When air-fuel ratio feedback correction value or adaptive control value continues at lower (lean) limit or at lower (rich) limit for a certain period of time or adaptive control value is not renewed for a certain period of time. | • Injector circuit • Injector • Fuel line pressure • Air flow meter • Cold start injector • Oxygen sensor circuit • Oxygen sensor • Water temp. sensor • ECU | — 27 | [waveform pattern] F02617 | Sub-Oxygen Sensor Circuit | Open or short circuit in sub-oxygen sensor signal (OX2). | • Sub-oxygen sensor circuit • Sub-oxygen sensor • ECU | — 27 | [waveform pattern] F02617 | Sub-Oxygen Sensor Heater | Open or short circuit in sub-oxygen sensor heater signal (HT). | • Sub-oxygen sensor heater circuit • Sub-oxygen sensor heater circuit • ECU | — 31 | [waveform pattern] R1H612 | Air Flow Meter Signal | (7M-GE) Open circuit in VC signal or short circuit between VS and E2 when idle contacts are closed. (7M-GTE) Open or short circuit in air flow meter signal. | • Air flow meter circuit • Air flow meter • ECU | FI-38 32 | [waveform pattern] R1H633 | Air Flow Meter Signal | Open circuit in E2 or short circuit between VC and VS. | • Air flow meter circuit • Air flow meter • ECU | FI-57