Fuel Cut Control Unit: Testing and Inspection
INSPECTION1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL
a. Connect the TOYOTA hand-held tester or OBD II scan tool to the DLC3.
b. Please refer to the TOYOTA hand-held tester or OBD II scan tool operator's manual for further details.
3. INSPECT FUEL CUT OFF RPM
a. Increase the engine speed to at least 3,500 rpm.
b. Use a sound scope to check for injector operating noise.
c. Check that when the throttle lever is released injector, operation noise stops momentary and then resumes.
HINT: Measure with the A/C OFF.
Fuel return rpm: 1,400 rpm
4. DISCONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL