Diagnostic Procedure 18 — Engine knocks (Detonation) (Cont'd)

D (from previous page)

Check exhaust gas sensor. [CONSULT] Run engine at approximately 2,000 rpm after warm-up. Conduct 'MIXTURE RATIO' test with 'FUNCTION TEST' showing on display or proceed as follows: Select 'EXH GAS SEN' with 'DATA MONITOR' showing on display. Run engine at 2,000 rpm under no load after warm-up. Check to ensure display alternately shows 'LEAN' and 'RICH' at least 5 times within 10 seconds. RICH->LEAN->RICH->LEAN->RICH... (1 time = LEAN, 2 times = RICH...). [No CONSULT] Set body-side diagnostic connector (inside fuse box) in 'Exhaust gas sensor monitor' mode. (Refer to 'Self-Diagnosis'.) Run engine at 2,000 rpm under no load after warm-up. Check to ensure RED L.E.D. on E.C.U. flashes at least 5 times within 10 seconds.

Check compression pressure and ignition timing.

E (continues to next page)