EG–399 ENGINE – 2JZ–GE ENGINE TROUBLESHOOTING CHECK FOR INTERMITTENT PROBLEMS As described in the preceding paragraph, abnormality detection ability in the test mode is increased compared to that in the normal mode, so that when intermittent problems occur in the ECM signal circuits (G1, G2, NE, THW, THA, VTA1) shown in the table below, the appropriate diagnostic trouble code is output. Accordingly, when the diagnostic trouble codes shown in the table opposite (13, 22, 24, 41) are output during the diagnostic trouble code check, and inspection of the appropriate circuits reveals no abnormality, check for intermittent problems as described below. By checking for intermittent problems, the place where intermittent problems are occurring due to poor contacts can be isolated. DTC | Circuit 13 | G, NE signal circuit (No.2) 22 | Engine coolant temp. sensor circuit 24 | Intake air temp. sensor circuit 41 | Throttle position sensor circuit CLEAR DIAGNOSTIC TROUBLE CODES See page EG–387. SET TEST MODE 1. With the ignition switch OFF, using SST, connect the terminals TE2 and E1 of the data link connector 2. SST 09843–18020 2. Start the engine and check to see the malfunction indicator lamp goes off. PERFORM A SIMULATION TEST Using the symptom simulation (See page IN–24), apply vibration to and pull lightly on the wire harness, connector or terminals in the circuit indicated by the malfunction code. In this test, if the malfunction indicator lamp lights up, it indicates that the place where the wire harness, connector or terminals being pulled or vibrated has a faulty contact. Check that point for loose connections, dirt on the terminals, poor fit or other problems and repair as necessary. HINT: After cancelling out the diagnostic trouble code in memory and set the test mode, if the malfunction indicator lamp does not go off after the engine is started, check thoroughly for faulty contacts, etc., then try the check again. If the malfunction indicator lamp still does not go off, check and replace ECM. P19981 FI2330