EG-494 ENGINE – 2JZ-GTE ENGINE TROUBLESHOOTING DIAGNOSTIC TROUBLE CODE CHART HINT: Parameters listed in the chart may not be exactly the same as your reading due to type of the instruments or other factors. DTC No. | Number of MIL Blinks | Circuit | Diagnostic Trouble Code Detecting Condition – | [waveform] BE3931 | Normal | No code is recorded 12 | [waveform] BE3931 | G, NE Signal (No.1) | No "NE" or "G1" and "G2" signal to ECM for 2 sec. or more after cranking 13 | [waveform] BE3931 | G, NE Signal (No.2) | No NE signal to ECM for 0.1 sec. or more at 1,000 rpm or more NE signal does not pulse 12 times to ECM during the interval between G1 and G2 pulses Deviation in G (G1, G2) and NE signal continues for 3 sec. during idling (throttle fully closed) after engine warmed up 14 | [waveform] BE3931 | Ignition Signal | No IGF signal to ECM for 4–7 consecutive IGT signals with engine speed less than 3,000 rpm 16 | [waveform] BE3931 | A/T Control Signal | Fault in communications between the engine CPU and A/T CPU in the ECM