Fuel Cut-Out Switch: Testing and Inspection
1. WARM UP ENGINEAllow the engine to warm up to normal operating temperature.
2. CONNECT LEXUS HAND-HELD TESTER OR OBDII SCAN TOOL
a. Remove the fuse cover on the instrument panel.
b. Connect a LEXUS hand-held tester or OBDII scan tool to the DLC3.
c. Please refer to the LEXUS hand-held tester or OBDII scan tool operator's manual for further details.
3. INSPECT FUEL CUT RPM OPERATION
a. Increase the engine speed to at least 2,500 rpm.
b. Check for injector operating noise.
c. Check that when the throttle lever is released, injector operation noise stops momentarily and then resumes.
HINT:
- The vehicle should be stopped.
- Measure with the A/C OFF.
Fuel return speed: 1,400 rpm
4. DISCONNECT LEXUS HAND-HELD TESTER OR OBD-II SCAN TOOL