Diagnostic Procedure 8 — Hesitation when the Engine is Cold
EF & EC-78flowchartTROUBLE DIAGNOSES
Diagnostic Procedure 8 — Hesitation when the Engine is Cold
1
Check throttle sensor. [With CONSULT] Conduct self-diagnosis and "Real Time Diagnosis" with "DATA MONITOR" showing on display. (Refer to "CONSULT".) [Without CONSULT] Conduct self-diagnosis Mode II. (Refer to "Self-Diagnosis".)
N.G.
Check throttle sensor and circuit. Refer to "Throttle Sensor". (See page EF&EC-143).
O.K.
2
Check vehicle speed sensor. Check speedometer operation. Refer to "Vehicle Speed Sensor". (See page EF&EC-146).
N.G.
Repair or replace.
O.K.
3
Check air flow meter. Check for operation. Refer to "Air Flow Meter". (See page EF&EC-134).
N.G.
same as step 2
O.K.
4
Check ignition system. Check for operation. Refer to "Ignition Signal". (See page EF&EC-140).
N.G.
same as step 2
O.K.
5
Check spark plugs. Stop engine. Remove spark plugs and check for contaminants or damage. Also check spark gaps.
N.G.
same as step 2
O.K.
6
Check air intake for leaks. Start engine. Check to ensure engine speed increases when blow-by hose is pinched with fingers.
N.G.
Repair areas where air leaks.
O.K.
7
To point A (continued on next page)
See also
EF & EC-143Diagnostic Procedure 27 - THROTTLE SENSOR (Code No. 43)EF & EC-146Diagnostic Procedure 28 - VEHICLE SPEED SENSOR (Not self-diagnostic item)EF & EC-134Diagnostic Procedure 24 — Air Flow Meter (Code No. 12)EF & EC-140TROUBLE DIAGNOSES — Diagnostic Procedure 26: IGNITION SIGNAL (Code No. 21)