Diagnostic Procedure 12 — Engine stalls when cold (Cont'd)
EF & EC-91flowchartTROUBLE DIAGNOSES
Diagnostic Procedure 12 — Engine stalls when cold (Cont'd)
1
B (from previous page)
2
Check throttle sensor. CONSULT method: Conduct self-diagnosis and "Real Time Diagnosis" with "DATA MONITOR" showing on display. (Refer to "CONSULT".) No-tool method: 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.
3
Check AAC valve. CONSULT method: Start engine. Conduct "A.A.C. VALVE" test with "FUNCTION TEST" showing on display. Check to ensure control duty ratio is in the 80 - 20% range and engine speed changes at least 150 rpm or proceed as follows: Start engine. Select "A.A.C. Valve Position" with "ACTIVE TEST" showing on display. Touch "Qu" and "Qd" to ensure engine speed changes with AAC valve position (in percentage). No-tool method: Start engine. Check to ensure engine speed decreases when A.A.C. valve connector is removed.
N.G.
Check A.A.C. valve and circuit. Refer to "A.A.C. Valve". (See page EF&EC-158).
O.K.
4
Check air flow meter. Check for operation. Refer to "Air Flow Meter". (See page EF&EC-134).
N.G.
Repair or replace.
O.K.
5
Check compression pressure. Standard value: 1,324 kPa (13.24 bar, 13.5 kg/cm², 192 psi)/350 rpm. Limit value: 1,128 kPa (11.28 bar, 11.5 kg/cm², 164 psi)/350 rpm. Pressure difference tolerance among cylinders: 98 kPa (0.98 bar, 1.0 kg/cm², 14 psi)/350 rpm
N.G.
Check piston, piston rings, valves, valve seats and cylinder head gasket.
O.K.
6
C (continues to next page)