LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Scion >> 2004 >> xA Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 923 (Introduction) >> How To Troubleshoot Ecu Controlled Systems >> General Information >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

General Information: Notes

WARNING: This page is about a different car, the 2004 Scion xB. However, it is still accessible from the selected car via links, so may be relevant.

A large number of ECU controlled systems are used in the SCION xB. In general, ECU controlled systems are considered to be very intricate, requiring a high level of technical knowledge to troubleshoot. However, most problem checking procedures only involve inspecting the ECU controlled system's circuits one by one. An adequate understanding of the system and a basic knowledge of electricity is enough to perform effective troubleshooting, accurate diagnoses and necessary repairs. Detailed information and troubleshooting procedures on major ECU controlled systems in this vehicle are outlined below:

SYSTEM CHART

System Page
1. SFI System SFI SYSTEM - DIAGNOSIS
2. ABS with EBD & BA & TRAC & VSC System ABS WITH EBD & BA & TRAC & VSC SYSTEM - DIAGNOSIS
3. Electronically Controlled Automatic Transmission [ECT] ELECTRONIC CONTROLLED AUTOMATIC TRANSAXLE (ECT)
4. Supplemental Restraint System AIR BAG RESTRAINT SYSTEMS
5. Combination Meter COMBINATION METER - DIAGNOSIS
6. Power Door Lock Control System POWER DOOR LOCK SYSTEM - DIAGNOSIS
7. Wireless Door Lock Control System WIRELESS DOOR LOCK CONTROL SYSTEM - DIAGNOSIS
8. CAN Communication System CAN COMMUNICATION SYSTEM - DIAGNOSIS