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 137 (AUTOMATIC HEADLIGHTS)SYSTEM TESTSTEST E: INITIAL SET CONTROL FUNCTION OPERATES, BUT HEADLIGHT AIMING DOES NOT OPERATE (WARNING LIGHT LIGHTS UP)
2004 Toyota Celica GT, Standard
Test E: Initial Set Control Function Operates, But Headlight Aiming Does Not Operate (Warning Light Lights Up)
2004 Toyota Celica GT, StandardSECTION Test E: Initial Set Control Function Operates, But Headlight Aiming Does Not Operate (Warning Light Lights Up)
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
- Check the continuity of the vehicle side wiring harness between headlight leveling ECU and the headlight leveling motor. See Fig 1. If there is continuity, go to the next step. If there is not continuity, repair and replace the harness or connector.
- Inspect the right rear height control sensor sub-assembly. Connect the 3 batteries (1.5 volts) in series. Connect the battery positive terminal to terminal SHB and the negative one to the terminal SHG to apply voltage of 4.5 volts between terminals SHB and SHG. See Fig 2. While slowly moving he link up and down with the voltage being applied, check the voltage between the terminals SHRR and SHG. See INSPECTING RH REAR HEIGHT CONTROL SENSOR TERMINALS SHRR & SHG VOLTAGE table. If the voltage is OK, check and replace the headlight leveling ECU assembly. See HEADLIGHT ASSEMBLY under REMOVAL & INSTALLATION. If the voltage is not good, replace the right rear height control sensor sub-assembly. See HEIGHT CONTROL SENSOR under REMOVAL & INSTALLATION.INSPECTING RH REAR HEIGHT CONTROL SENSOR TERMINALS SHRR & SHG VOLTAGE
Link Angle STP Voltage (V) +45° (High) 4.1 0° (Normal) 2.25 -45° (Low) 0.5
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.