Idle Speed/Ignition Timing/Idle Mixture Ratio Inspection
EF & EC-399flowchartChecking and adjusting idle rpm (continued)
1
J (from previous page)
2
Check idle speed.
• Read idle speed in "DATA MONITOR" mode with CONSULT.
OR
• Check idle speed.
850±50 rpm
O.K.
INSPECTION END
N.G.
3
Check A.A.C. valve and replace if necessary.
4
Check A.A.C. valve harness and repair if necessary.
5
Check E.C.U. function* by substituting another known good E.C.U.
INSPECTION END
NOTE
* E.C.U. may be the cause of a problem, but this is rarely the case.