E.C.C. Trouble Diagnoses (Models with catalyzer without E.G.R.) - Diagnostic Procedure 1 (Cont'd)
EF & EC-51flowchartApplies to GA13DS, GA14DS & GA16DS engines with catalyzer, without E.G.R.
Diagnostic Procedure 1 (Cont'd)
Diagnostic Procedure 1 - Main Power Supply and Ground Circuit
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INSPECTION START
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A: CHECK POWER SUPPLY. 1) Turn ignition switch "ON". 2) Check voltage between E.C.U. terminal H and ground. Voltage: Battery voltage
O.K.
B: CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Disconnect E.C.U. harness connector. 3) Check harness continuity between E.C.U. terminal A and body ground. Continuity should exist. If N.G., repair harness or connectors.
B: CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Disconnect E.C.U. harness connector. 3) Check harness continuity between E.C.U. terminal A and body ground. Continuity should exist. If N.G., repair harness or connectors.
N.G.
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C: CHECK HARNESS CONTINUITY BETWEEN E.C.C. RELAY AND E.C.U. 1) Turn ignition switch "OFF". 2) Disconnect E.C.U. harness connector. 3) Disconnect E.C.C. relay. 4) Check harness continuity between E.C.U. terminal H and terminal 3. Continuity should exist.
N.G.
Repair harness or connectors.
O.K.
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D: CHECK VOLTAGE BETWEEN E.C.C. RELAY AND GROUND. 1) Turn ignition switch "ON". 2) Check voltage between terminals 2, 5 and ground. Voltage: Battery voltage
N.G.
Check the following. • Harness connectors (M21), (E16) • 25A fusible link • 10A fuse • Harness continuity between E.C.C. relay and battery • Harness continuity between E.C.C. relay and fuse. If N.G., repair harness or connectors.
Check the following. • Harness connectors (M21), (E16) • 25A fusible link • 10A fuse • Harness continuity between E.C.C. relay and battery • Harness continuity between E.C.C. relay and fuse. If N.G., repair harness or connectors.
O.K.
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E: CHECK HARNESS CONTINUITY BETWEEN E.C.C. RELAY AND GROUND. 1) Turn ignition switch "OFF". 2) Check harness continuity between terminal 1 and body ground. Continuity should exist.
N.G.
same as step 3
O.K.
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(A) continue