LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2003 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System Self Diagnostics >> Diagnostic Tests >> DTC P1600: Back-Up Power Source Circuit Malfunction >> Circuit Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit Description

Battery positive voltage is applied to terminal BATT of ECM even when ignition switch is OFF for use by DTC memory and air-fuel ratio adaptive control value memory, etc. Detecting condition of DTC is when there is an open in back up power source circuit. If DTC P1600 is displayed, ECM does not store another DTC.

scientia non olet · About LEMON Manuals