E.C.C. TROUBLE DIAGNOSES (Models with catalyzer and E.G.R.) — Diagnostic Procedure 1 (Cont'd)
EF & EC-87flowchartB13 vs N14 terminal/connector differences throughout: relay terminal 5 (B13) vs 3 (N14); voltage check terminals 2,3 (B13) vs 5 (N14); diode D18 (B13) vs E27 (N14). Some harness connector IDs partly occluded. Applies to GA13DS, GA14DS & GA16DS with catalyzer and E.G.R.
Diagnostic Procedure 1 (Cont'd) — Main power supply and ground circuit
1
INSPECTION START
2
A: CHECK POWER SUPPLY. 1) Turn ignition switch "ON". 2) Check voltage between E.C.U. terminal 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 and engine 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 and engine ground. Continuity should exist. If N.G., repair harness or connectors.
N.G.
3
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 and terminal (5) (B13 models), terminal (3) (N14 models). Continuity should exist.
N.G.
Check the following. - Harness connectors (F34), (M2) - Harness connectors - Harness continuity between E.C.U. and E.C.C. relay. If N.G., repair harness or connectors.
Check the following. - Harness connectors (F34), (M2) - Harness connectors - Harness continuity between E.C.U. and E.C.C. relay. If N.G., repair harness or connectors.
O.K.
4
D: CHECK VOLTAGE BETWEEN E.C.C. RELAY AND GROUND. 1) Turn ignition switch "ON". 2) Check voltage between terminals (2),(3) (B13 models), terminals (2) (N14 models) and ground. Voltage: Battery voltage
N.G.
Check the following. - Harness connectors (M1), (B4) - 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 (M1), (B4) - 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.
5
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.
Check the following. - Diode (D18) (B13 models) - Diode (E27) (N14 models) - Harness continuity between diode and E.C.C. relay - Harness continuity between diode and body ground. If N.G., repair harness or connectors.
Check the following. - Diode (D18) (B13 models) - Diode (E27) (N14 models) - Harness continuity between diode and E.C.C. relay - Harness continuity between diode and body ground. If N.G., repair harness or connectors.
O.K.
6
(A) — continues to next page