Diagnostic Procedure 22 (Cont'd)
EF & EC-129flowchartHarness connector pairs differ by drive side: M59/E55 for L.H.D. models, M3/E1 for R.H.D. models.
TROUBLE DIAGNOSES
Diagnostic Procedure 22 (Cont'd)
Diagnostic Procedure 22 — Main Power Supply and Ground Circuit (Cont'd)
1
INSPECTION START
2
CHECK POWER SUPPLY.
1) Turn ignition switch "ON".
2) Check voltage between E.C.U. terminals 38, 47 and ground.
Voltage: Battery voltage
O.K.
CHECK GROUND CIRCUIT.
CHECK GROUND CIRCUIT.
1) Turn ignition switch "OFF".
2) Disconnect E.C.U. harness connector.
3) Check harness continuity between E.C.U. terminals 6, 13, 107, 108 and engine ground.
Continuity should exist.
If N.G., repair harness or connectors.
N.G.
3
CHECK HARNESS CONTINUITY BETWEEN E.C.C.S. RELAY AND E.C.U.
1) Turn ignition switch "OFF".
2) Disconnect E.C.U. harness connector.
3) Disconnect E.C.C.S. relay.
4) Check harness continuity between E.C.U. terminals 38, 47 and E.C.C.S. relay terminal 5.
Continuity should exist.
N.G.
Check the following.
Check the following.
• Harness connectors F21, M17
• Harness connectors M59, E55 (L.H.D. models)
• Harness connectors M3, E1 (R.H.D. models).
• Harness continuity between E.C.U. and E.C.C.S. relay
If N.G., repair harness or connectors.
O.K.
4
CHECK VOLTAGE BETWEEN E.C.C.S. RELAY AND GROUND.
1) Check voltage between E.C.C.S. relay terminals 1, 3 and ground.
Voltage: Battery voltage
N.G.
Check the following.
Check the following.
• 25A fusible link
• Harness continuity between E.C.C.S. relay and battery
If N.G., repair harness or connectors.
O.K.
5
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