On-Vehicle Inspection [09/2014 - 11/2017]: Procedure
WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT COOLING FAN ECU
- Check and ensure the following conditions:
- The engine switch is off.
- The engine coolant temperature is less than 92°C (198°F).
- The battery voltage is between 11 and 14 V.
- The A/C switch is off.
- Connect the pickup of a clamp-on ammeter around either of the 2 wires for the cooling fan motor.
- Turn the engine switch on (IG) and wait for approximately 10 seconds. Check that the fans are not operating.
- Start the engine. Check that the fans are not operating with the engine idling.
HINT:
- Make sure that the engine coolant temperature is less than 92°C (198°F).
- Turn the A/C switch off.
- Check that the fans operate when the A/C switch is turned on.
Standard Current
Item Condition Specified Condition Cooling fan motor Battery voltage applied at 20°C (68°F) 10.3 to 16.3 A No. 2 cooling fan motor 5.3 to 11.3 A HINT:
Make sure that the engine coolant temperature is less than 92°C (198°F).
- Check that the fans operate when the engine coolant temperature sensor connector is disconnected.
Standard Current
Item Condition Specified Condition Cooling fan motor Battery voltage applied at 20°C (68°F) 10.3 to 16.3 A No. 2 cooling fan motor 5.3 to 11.3 A - After the engine is warmed up, check that the fans operate as shown in the illustration.
*a Operating Diagram *b A/C OFF *c MAX HI *d HI *e LO *f OFF *g Fan Speed HINT:
- The engine coolant temperature at which the fans start operating is approximately 94°C (201°F).
- This system can also be checked using the Techstream.
- Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.
Powertrain > Engine > Data List
Tester Display Coolant Temp
- Check and ensure the following conditions: