Idle Speed/Ignition Timing/Idle Mixture Ratio Inspection — Idle check and procedure (Cont'd)
EF & EC-393flowchartDiagnostic connector for CONSULT: connect CHK and IGN terminals with a suitable harness. Page is in the SR tab of the EF & EC section.
Idle mixture ratio check (Cont'd)
1
B
2
1. See "M/R F/C MNT" in "Data monitor" mode.
2. Run engine at about 2,000 rpm for about 2 minutes under no-load.
3. Maintaining engine at 2,000 rpm under no-load (engine is warmed up sufficiently.), check that the monitor fluctuates between "LEAN" and "RICH" more than 5 times during 10 seconds.
RICH → LEAN → RICH → : 1 time, 2 times ... LEAN → RICH .....
OR
3
1. Set "Exhaust gas sensor monitor" in the self-diagnostic mode II. (See page EF & EC-412.)
2. Run engine at about 2,000 rpm for about 2 minutes under no-load.
3. Maintaining engine at 2,000 rpm under no-load, check to make sure that the RED L.E.D. on the E.C.U. or the check engine light on the instrument panel goes ON and OFF more than 5 times during 10 seconds.
N.G.
C
END