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.
2013 Lexus IS 250C BaseFACTORY OEM SERVICE PROCEDURE
Service Data [08/2012 - ]
| Camshaft timing oil control valve assembly | ||
| Resistance | 20°C (68°F) | 6.9 to 7.9 Ω |
| Throttle body assembly | ||
| Resistance 2 (M+) - 1 (M-) |
20°C (68°F) | 0.3 to 100 Ω |
| Mass air flow meter | ||
| Resistance 1 (THA) - 2 (E2) |
-20°C (-4°F) | 13.6 to 18.4 kΩ |
| 20°C (68°F) | 2.21 to 2.69 kΩ | |
| 60°C (140°F) | 0.49 to 0.67 kΩ | |
| Crankshaft position sensor | ||
| 1 - 2 | -10 to 50 °C (14 to 122°F) | 1630 to 2740 Ω |
| 50 to 100 °C (122 to 212°F) | 2065 to 3225 Ω | |
| Engine coolant temperature sensor | ||
| Resistance | Approx. 20°C (68°F) | 2.32 to 2.59 kΩ |
| Approx. 80°C (176°F) | 0.310 to 0.326 kΩ | |
| Knock sensor | ||
| Resistance | 20°C (68°F) | 120 to 280 kΩ |
| Air fuel ratio sensor | ||
| Resistance 1 (HT) - 2 (+B) |
20°C (68°F) | 1.8 to 3.4 Ω |
| Resistance 1 (HT) - 4 (AF-) |
10 kΩ or higher | |
| Heated oxygen sensor | ||
| Resistance 1 (HT) - 2 (+B) |
20°C (68°F) | 5 to10 Ω |
| Resistance 1 (HT) - 4 (E) |
10 kΩ or higher | |
| INTEGRATION RELAY (C/OPEN relay) | ||
| Resistance 2B-5 - 2B-8 |
Do not apply battery voltage between terminals 2B-6 and 2B-7 | 10 kΩor higher |
| Voltage 2B-5 - 2B-8 |
Apply battery voltage between terminals 2B-7 and 2B-8 | 11 to 14 V |
| INTEGRATION RELAY (EFI relay) | ||
| Resistance EFI fuse terminal 2 - 2A-8 |
Do not apply battery voltage between terminals 2A-6 and 2A-7 | 10 kΩor higher |
| Apply battery voltage between terminals 2A-6 and 2A-7 | Below 1 Ω | |
| INTEGRATION RELAY (EFI 2 relay) | ||
| Resistance F/PMP fuse terminal 2 - 2B-4 |
Do not apply battery voltage between terminals 2B-2 and 2B-3 | 10 kΩor higher |
| Apply battery voltage between terminals 2B-2 and 2B-3 | Below 1 Ω | |
| INTEGRATION RELAY (EFI INJ relay) | ||
| Resistance EFI INJ fuse terminal 2 - 2A-4 |
Do not apply battery voltage between terminals 2A-2 and 2A-3 | 10 kΩor higher |
| Apply battery voltage between terminals 2A-2 and 2A-3 | Below 1 Ω | |
Factory Service Tools
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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.
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