With Manufacturer's Scan Tool

DTC CHECK (Using LEXUS hand-held tester)




a. Prepare a LEXUS hand-held tester.
b. Connect the LEXUS hand-held tester to DLC3.
c. Turn the ignition switch ON and switch the LEXUS hand-held tester main switch ON.
d. Use the LEXUS hand-held tester to check the DTCs, and note them down. (For opening instructions, see the LEXUS hand-held tester's instruction book.)
e. See Trouble Code Descriptions to confirm the details of the DTCs.

PRESENT CODE & PAST CODE

GATEWAY ECU has the given two kinds of DTC. Described as follows are each explanation and dealing method of its DTC.

1. PRESENT CODE:
While any failure is continuously occurring, DTC is displayed as "PRESENT CODE".
In this case, proceed the diagnosis procedure in the CIRCUIT INSPECTION.

2. PAST CODE:
In the case that no failure is occurred at present despite that the customer has experienced failure, this is not recorded as "PRESENT CODE". However, GATEWAY ECU, in some cases, can record the failures caused by momentary disconnection or occasional failure as "PAST CODE*". This is set as a help for diagnostic operations.

As this diagnostic inspection with the PAST CODE as well, basically this is diagnostic operation using each DTC. However, no failure is occurred at present, therefore, it is hard to consider the cause as the related part failure, so check wiring connecting each part or connection failure of the connectors thoroughly.

*: DTC to detect as "PAST CODE" is all the DTC in the DTC CHART.