E.C.C. TROUBLE DIAGNOSES (Models with catalyzer and E.G.R.) — Diagnostic Procedure 6 (Cont'd)
EF & EC-99flowchartApplies to models with catalyzer and E.G.R.: GA13DS, GA14DS & GA16DS.
GA13DS, GA14DS & GA16DS
Diagnostic Procedure 6 (Cont'd)
Ignition signal diagnostic flow
1
INSPECTION START
2
A: CHECK CONTROL FUNCTION. 1) Start engine. 2) Set timing light on high tension cables No. 1, No. 2, No. 3 and No. 4. 3) Check timing light flashes.
O.K.
CHECK COMPONENT (Spark plug). Refer to "Checking Spark Plugs" in MA section. If N.G., replace spark plug.
N.G.
3
B: CHECK POWER SUPPLY. 1) Stop engine. 2) Disconnect ignition coil harness connector. 3) Turn ignition switch "ON". 4) Check voltage between terminal (a) and ground. Voltage: Battery voltage
N.G.
Check the following. • Harness connectors (F34), (M36) • Harness connectors (B11), (B284) • Harness continuity between ignition coil and ignition switch. If N.G., repair harness or connectors.
Check the following. • Harness connectors (F34), (M36) • Harness connectors (B11), (B284) • Harness continuity between ignition coil and ignition switch. If N.G., repair harness or connectors.
O.K.
4
C: CHECK GROUND CIRCUIT. 1) Turn ignition switch "OFF". 2) Disconnect power transistor harness connector. 3) Check harness continuity between terminal (b) and terminal (e), terminal (d) and engine ground. Continuity should exist.
N.G.
Repair harness or connectors.
O.K.
5
D: CHECK OUTPUT SIGNAL CIRCUIT. 1) Disconnect E.C.U. harness connector. 2) Check harness continuity between E.C.U. terminal (26) and terminal (c). Continuity should exist.
N.G.
same as step 4
O.K.
6
CHECK COMPONENTS (Ignition coil, power transistor and high tension cable). Refer to "Electrical Components Inspection". (See pages EF & EC-143, 144 and "Checking Ignition Wires" in MA section.)
N.G.
Replace malfunctioning component(s).
O.K.
Check E.C.U. pin terminals for damage or the connection of E.C.U. harness connector.