Check For Intermittent Problems

Abnormality detection ability in the test mode is increased compared to that in the normal mode, so that when intermittent problems or momentary shorts occur in the ECM signal circuits (G1, G2, NE, THW, THA VTA1, VTA2) shown in the table opposite the appropriate diagnostic trouble code is output.





Accordingly, when the diagnostic trouble codes shown in the image above (13, 22, 24, 41 , 47) are output during the diagnostic trouble code check, and inspection of the appropriate circuits reveals no abnormality, perform the check for Intermittent Problem as described opposite.
By performing the check for Intermittent Problem, the place where Intermittent Problem or momentary shorts are occurring due to poor contacts can be isolated.

CLEAR DIAGNOSTIC TROUBLE CODES:








- Remove the EFI fuse (30 A) from R/B No. 2 for 10 seconds or more, with the ignition switch OFF.

SET TEST MODE:
1. With the ignition switch off, using SST 09843-18020 or equivalent, connect the terminals TE2 and E1 of the data link connector 2.
2. Start the engine and check to see the malfunction indicator lamp to go off.








PERFORM A SIMULATION TEST:
Using the symptom simulation, 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 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 contact, etc., then try the check again. If the malfunction indicator lamp still does not go off, check and replace ECM.