EG–398 ENGINE – 2JZ–GE ENGINE TROUBLESHOOTING FAIL–SAFE CHART If any of the following codes is detected, the ECM enters fail–safe mode. DTC No. | Fail–Safe Operation | Fail–Safe Deactivation Conditions 14 | Fuel cut | 1 IGF detected in 3 consecutive ignitions 16 | Torque control prohibited | Returned to normal condition 22 | THW is fixed at 80˚C (176˚F) | Returned to normal condition 24 | THA is fixed at 20˚C (68˚F) | Returned to normal condition 31 | • Ignition timing fixed at 10˚BTDC • Injection time fixed: (Starting....9 msec. (IDL ON....3.6 msec. (IDL OFF....6.7 msec. | KS input 15 times/sec. or more 35 | Atmospheric pressure is fixed at 101.3 kPa (760 mmHg, 29.92 in.Hg) | Returned to normal condition 41 | VTA1 is fixed at 0˚ | The following must each be repeated at least 2 Times consecutively: • 0.25 V ⊕ VTA ⊕ 0.95 V • IDL: ON 52 | Max. timing retardation | IG switch OFF 53 | Max. timing retardation | Returned to normal condition 55 | Max. timing retardation | IG switch OFF Back–Up Function If there is trouble with the program in the ECM and the ignition signals (IGT) are not output from the microcomputer, the ECM controls fuel injection and ignition timing at predetermined levels as a back–up function to make it possible to continue to operate the vehicle. Furthermore, the injection duration is calculated from the starting signal (STA) and the throttle position signal (IDL). Also, the ignition timing is fixed at the initial ignition timing, 10˚BTDC, without relation to the engine speed. HINT: if the engine is controlled by the back–up function, the malfunction indicator lamp lights up to warn the driver of the malfunction but the diagnostic trouble code is not output.