Trouble Diagnoses — Diagnostic Procedure 1 — High-idling (after warm-up)
EF & EC-59flowchartDiagnostic Procedure 1 — High-idling (after warm-up)
1
Check "IDLE POSITION". With "WORK SUPPORT" showing on display, check to ensure "IDLE POSITION" is "ON". Check to ensure throttle sensor output is approximately 5 volts during idle.
N.G.
Check fast idle cam. Check throttle linkage and throttle valve. Refer to "Throttle Sensor" (See page EF&EC-143).
O.K.
2
Check A.A.C. valve. Check to ensure idle speed decreases when throttle sensor connector is removed.
O.K.
Check idle rpm control system.
N.G.
3
Check intake air for leaks. Run engine at a speed of approximately 2,000 rpm after warm-up. Select "MIXTURE RATIO TEST" under "FUNCTION TEST" on display, then touch "START" or proceed as follows: Warm up engine. Select "FUEL INJECTION" under "ACTIVE TEST" on display, then touch "DWN" to change correction value of fuel injected. Test must be finished as quickly as possible. Ensure that idle speed decreases. (Alternative without CONSULT: Warm up engine. Remove exhaust gas sensor connector. Ensure idle speed decreases after racing engine at speeds less than approximately 2,000 rpm for 30 seconds.)
N.G.
Repair areas where air leaks.
O.K.
END