On-Board Diagnostic System

On-Board Diagnostic System
The P/S control module has the an on-board self-diagnostic function which detects malfunctions in this system. When diagnosing troubles, be sure to have full understanding of On-Board Diagnostic System and each item in Precautions for Diagnosing Trouble, and then execute diagnosis according to P/S System Check.
The P/S control module performs on-board diagnosis (self-diagnosis) on the system and operates the "P/S" warning light (1) as follows.
^ The "P/S" warning light turns on when the engine switch is pressed to change the ignition mode to ON (but the engine stops) regardless of the condition of P/S control system. This is only to check if the "P/S" warning light operates properly.
^ When the engine is started, the on-board self diagnosis is performed and the "P/S" warning light turns off if no trouble is found.
^ When the P/S control module detects a trouble, the "P/S" warning light comes on to warn the driver of the trouble. At the same time, a DTC is stored in the module.