E.C.C. Trouble Diagnoses (Models with catalyzer and E.G.R.) — Diagnostic Procedure 11 (Cont'd)
EF & EC-111flowchartApplicable to GA13DS, GA14DS & GA16DS engines (models with catalyzer and E.G.R.).
Diagnostic Procedure 11 (Cont'd)
NOTE
Applicable to models GA13DS, GA14DS & GA16DS.
Diagnostic Procedure 11 (Cont'd) — Air-Fuel Ratio Control Solenoid Valve
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INSPECTION START
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[A] CHECK OVERALL FUNCTION. 1) Inspect and adjust idle speed and mixture ratio. (Refer to page EF & EC-153.) 2) Stop engine. 3) Disconnect exhaust gas sensor harness connector and A.I.V. control solenoid valve harness connector. 4) Set "CO"-meter on test take-off tube. 5) Start engine and run it at idle. 6) Check idle "CO"%. Idle "CO"%: 0.5 - 1.5% = a%. If N.G., adjust idle "CO"%. (Refer to page EF & EC-153.) 7) Disconnect carburetor harness connector F8. 8) Recheck idle "CO"%. Idle "CO"%: more than a%.
O.K.
INSPECTION END
N.G.
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[B] CHECK POWER SUPPLY. 1) Stop engine. 2) Turn ignition switch "ON". 3) Check voltage between terminal e and ground. Voltage: Battery voltage.
N.G.
Check the following. • Harness connectors F33, F37 • 10A fuse • Harness continuity between carburetor and fuse. If N.G., repair harness or connectors.
O.K.
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[C] CHECK OUTPUT SIGNAL CIRCUIT. 1) Turn ignition switch "OFF". 2) Disconnect E.C.U. harness connector. 3) Check harness continuity between E.C.U. terminal 103 and terminal f. Continuity should exist.
N.G.
Repair harness or connectors.
O.K.
5
CHECK COMPONENT (Air-fuel ratio control solenoid valve). Refer to "Electrical Components Inspection". (See page EF & EC-147.)
N.G.
Replace air-fuel ratio control solenoid valve.
O.K.
6
Check E.C.U. pin terminals for damage or the connection of E.C.U. harness connector.