E.C.C. TROUBLE DIAGNOSES (Models with catalyzer and E.G.R.) — Diagnostic Procedure 2 (Cont'd)
EF & EC-91flowchartSome harness connector IDs partly occluded (F34, M2, F31, E14). Applies to GA13DS, GA14DS & GA16DS models with catalyzer and E.G.R.
Diagnostic Procedure 2 (Cont'd) — Crank angle sensor
1
INSPECTION START
2
A: CHECK OVERALL FUNCTION. 1) Start engine and warm it up sufficiently. 2) Set timing light on high tension cable. 3) Check ignition timing while racing engine from idle speed to about 3,000 rpm under no-load. Ignition timing should advance.
O.K.
INSPECTION END
N.G.
3
B: CHECK POWER SUPPLY. 1) Stop engine. 2) Disconnect crank angle sensor harness connector. 3) Turn ignition switch "ON". 4) Check voltage between terminal (b) and ground. Voltage: Battery voltage
N.G.
Check the following. - Harness connectors (F34), (M2) - Harness connectors (F31), (E14) - Harness continuity between crank angle sensor and E.C.C. relay. If N.G., repair harness or connectors.
Check the following. - Harness connectors (F34), (M2) - Harness connectors (F31), (E14) - Harness continuity between crank angle sensor and E.C.C. relay. If N.G., repair harness or connectors.
O.K.
4
C: CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Check harness continuity between terminal (a) and engine ground. Continuity should exist.
N.G.
Repair harness or connectors.
O.K.
5
D: CHECK INPUT SIGNAL CIRCUIT. 1) Disconnect E.C.U. harness connector. 2) Check harness continuity between terminal (c) and E.C.U. terminal (18) (1° signal), terminal (d) and E.C.U. terminal (19) (180° signal). Continuity should exist.
N.G.
same as step 4
O.K.
6
CHECK COMPONENT (Crank angle sensor). Refer to "Electrical Components Inspection". (See page EF & EC-143.)
N.G.
Replace crank angle sensor.
O.K.
7
Check E.C.U. pin terminals for damage or the connection of E.C.U. harness connector.