Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 264 (BODY CONTROL SYSTEMS - DIAGNOSTICS)CIRCUIT INSPECTIONDIAGNOSIS CIRCUITINSPECTION PROCEDURE
2004 Toyota Celica GT, Standard
Inspection Procedure
2004 Toyota Celica GT, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
- Check voltage between terminals Tc and E1 of DLC3.
Preparation : Turn ignition switch ON.
Check : measure voltage between terminals Tc and E1 of DLC3.
OK : voltage: 10 - 14 V.
- OK : Proceed to next circuit inspection shown in problem symptoms. See PROBLEM SYMPTOMS .
- NG : Go to step 2.
- Check harness and connector between body ECU and DLC3, DLC3 and body ground
. See
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
.
- NG : Repair or replace harness or connector.
- OK : Check and replace Body ECU. See PROBLEM SYMPTOMS .
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.