The diagnostic socket is at the lower edge of the dashboard on the driver's side.
Idling speed with automatic gearbox
650–750 rpm650–750 rpm650–750 rpm
Idling speed with manual gearbox
650–750 rpm650–750 rpm650–750 rpm
Minimum engine oil temperature at VET
176°F176°F80°C
expand_morePetrol exhaust gas values
expand_moreCO content at idling speed
Vehicles without OBD
0.5 %0.5 %0.5 %
CO content at increased idling speed
0.3 %0.3 %0.3 %
expand_moreDelta lambda
Vehicles without OBD
0.03 λ0.03 λ0.03 λ
Ignition time
-10°00'±2°00' - before TDC + after TDC
expand_moreIncreased idling speed
Vehicles with OBD
2500–3100 rpm2500–3100 rpm2500–3100 rpm
Vehicles without OBD
2300–2800 rpm2300–2800 rpm2300–2800 rpm
expand_moreLambda sensor design
Vehicles with OBD
Jump type lambda sensor
expand_moreLambda value
Vehicles with OBD
0.97–1.03 λ0.97–1.03 λ0.97–1.03 λ
Vehicles without OBD
0.98–1.02 λ0.98–1.02 λ0.98–1.02 λ
expand_morePetrol conditioning speed
Vehicles without OBD
2500 rpm2500 rpm2500 rpm
expand_morePetrol conditioning time
Vehicles without OBD
180 s180 s180 s
expand_moreSpeed for disturbance variable
Vehicles without OBD
650–750 rpm650–750 rpm650–750 rpm
expand_moreTest speed for lambda sensor signal
Vehicles with OBD
550–800 rpm550–800 rpm550–800 rpm
expand_moreVoltage swing at test speed
Vehicles with OBD
0.3 V0.3 V0.3 V
(More than).
To reduce environment impact and pass government inspections keep emission parameters at the level prescribed by Toyota.
Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2003 Toyota Celica Coupe user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.
Before doing any DIY service please check your insurance policy and Toyota warranty policy for your region. In some regions DIY service may invalidate your warranty.
DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Toyota Celica Coupe service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.
Doing basic service for your 2003 Toyota Celica Coupe you're not only saving money, but also also improving your technical skills and learning something new.
Toyota Celica Coupe Seventh generation facelift model years