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.
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HOMESERVICE MANUALSLEXUS2012IS 250C V6-2.5L (4GR-FSE)REPAIR AND DIAGNOSISINSTRUMENT PANEL, GAUGES AND WARNING INDICATORSTIRE MONITORING SYSTEMTESTING AND INSPECTIONREADING AND CLEARING DIAGNOSTIC TROUBLE CODES
2012 Lexus IS 250C V6-2.5L (4GR-FSE)
Reading and Clearing Diagnostic Trouble Codes
2012 Lexus IS 250C V6-2.5L (4GR-FSE)SECTION Reading and Clearing Diagnostic Trouble Codes
TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: DTC CHECK / CLEAR
1. DTC CHECK (USING SST CHECK WIRE)
(a) Turn the engine switch off.
(b) Using SST, connect terminals TC and CG of the DLC3.
SST : 09843-18040
(c) Turn the engine switch on (IG).
(d) Read and record any DTCs from the tire pressure warning light on the combination meter. Refer to the illustration as examples of the normal system code and codes 13 and 33.
HINT
* If the tire pressure warning light does not indicate any DTCs or does not flush, inspect the tire pressure warning light circuit or TC and CG terminal circuit.
* If 2 or more malfunctions are indicated at the same time, the lowest numbered DTC is displayed first.
(e) Refer to Diagnostic Trouble Code Chart Tire Pressure Warning System for DTC information.
(f) After completing the check, turn the engine switch off and remove SST from the DLC3.
SST : 09843-18040
2. DTC CHECK (USING TECHSTREAM)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and turn the Techstream on.
(d) Enter the following menus: Chassis / Tire Pressure Monitor / Trouble Codes.
(e) Read the DTCs following the prompts on the Techstream screen.
HINT
Refer to the Techstream operator's manual for further details.
3. CLEAR DTC
HINT
After repairing the malfunctions, clear the DTCs.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and turn the Techstream on.
(d) Enter the following menus: Chassis / Tire Pressure Monitor / Trouble Codes.
(e) Clear the DTCs following the prompts on the Techstream screen.
HINT
Refer to the Techstream operator's manual for further details.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.