Mode Description

On Board Diagnostic System Function
The on board diagnostic system has the following four functions.

MIL Flashing without DTC
If the ECM is in Diagnostic Test Mode II, MIL may flash when engine is running. In this case, check ECM test mode selector following "How to Switch Diagnostic Test Modes".
How to switch the diagnostic test (function) modes and details of the above functions are described in "How to Switch Diagnostic Test Modes".
How to Switch Diagnostic Test Modes


The following emission-related diagnostic information is cleared when the ECM memory is erased.
(1) Diagnostic trouble codes
(2) 1st trip diagnostic trouble codes
(3) Freeze frame data
(4) 1st trip freeze frame data
(5) System readiness test (SRT) codes
(6) Test values
(7) Others