Except For California
P0603 ECM POWER SUPPLY
Description
Battery voltage is supplied to the ECM even when the ignition switch is turned OFF for the ECM memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc.
DTC Logic
DTC Detection Logic
DTC Confirmation Procedure
Step 1-2:
Diagnostic Procedure
Step 1:
