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Home >> Subaru >> 1991 >> XT Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - PFI >> Diagnostic Code Chart >> Basic Operation Of Self-Diagnostic System >> In "NO TROUBLE" Condition

In "NO TROUBLE" Condition

BASIC OPERATION OF SELF-DIAGNOSTIC SYSTEM - NO TROUBLE MENU

Engine & Connector Conditions "CHECK ENGINE" Light should Be: O2 Monitor Lamp Should Read:
Engine On, Read Memory Connector Disconnected, Test Mode Connector Disconnected Off O2 Monitor
Engine On, Read Memory Connector Connected, Test Mode Connector Disconnected Off O2 Monitor
Engine On (1) , Read Memory Connector Disconnected, Test Mode Connector Connected Off - Blinking (2) Off (Vehicle Specs Code Displayed)
Engine On (1) , Read Memory Connector Disconnected, Test Mode Connector Connected Off - Blinking (2) Off (Memory Clears after Blinking)
Engine Off, Ignition Switch On, Read Memory Connector Disconnected, Test Mode Connector Disconnected (3) On Vehicle Specification Code Displayed
Engine Off, Ignition Switch On, Read Memory Connector Connected, Test Mode Connector Disconnected (3) On Vehicle Specification Code Displayed
Engine Off, Ignition Switch On, Read Memory Connector Disconnected, Test Mode Connector Connected (3) On Vehicle Specification Code Displayed
Engine Off, Ignition Switch On, Read Memory Connector Connected, Test Mode Connector Connected (3) On Vehicle Specification Code Displayed
(1) Ignition timing is set to 20° BTDC, test mode connector connected, and idle switch is On.
(2) The indication is not changed until the engine is operated at a speed greater than 2000 RPM for at least 40 seconds.
(3) Before starting the engine, the Self-Diagnostic system assumes the engine to be in a "NO TROUBLE" condition.
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