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TROUBLE DIAGNOSIS EC-1287 [VG33ER] C D E F G H I J K L M A EC FUNCTION INSPECTION PROCEDURE 1. Turn ignition switch OFF. 2. Connect “GST” to data link connector which is located under LH Diagnostic test mode Function MODE 1 READINESS TESTS This mode gains access to current emission-related data values, including analog inputs MODE 2 (FREEZE DATA) This mode gains access to emission-related data value which were stored by ECM during EC-1279, "Freeze Frame Data and 1st Trip Freeze . MODE 3 DTCs This mode gains access to emission-related power train trouble codes which were stored MODE 4 CLEAR DIAG INFO This mode can clear all emission-related diagnostic information. This includes: ● Clear number of diagnostic trouble codes (MODE 1) ● Clear diagnostic trouble codes (MODE 3) ● Clear trouble code for freeze frame data (MODE 1) ● Clear freeze frame data (MODE 2) ● Reset status of system monitoring test (MODE 1) ● Clear on board monitoring test results (MODE 6 and 7) MODE 6 (ON BOARD TESTS) This mode accesses the results of on board diagnostic monitoring tests of specific com- MODE 7 (ON BOARD TESTS) This mode enables the off board test drive to obtain test results for emission-related pow- MODE 8 — This mode can close EVAP system in ignition switch ON position (Engine stopped). ● Low ambient temperature ● Low battery voltage ● Engine running ● Ignition switch OFF ● Low fuel temperature ● Too much pressure is applied to EVAP system MODE 9 CALIBRATION ID This mode is to enable the off-board to request vehicle specific vehicle information such LEC104A |