Diagnostic Procedure 22 (Cont'd)
EF & EC-130flowchartHarness 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
A (from previous page)
2
CHECK VOLTAGE BETWEEN E.C.U. AND GROUND.
1) Check voltage between E.C.U. terminal 46 and ground.
Voltage: Battery voltage
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)
• 10A fuse (fuselink box)
• Harness continuity between E.C.U. and battery
If N.G., repair harness or connectors.
O.K.
3
CHECK GROUND CIRCUIT.
1) Check harness continuity between E.C.U. terminals 39, 48 and engine ground.
Continuity should exist.
N.G.
Repair harness or connectors.
O.K.
4
CHECK OUTPUT SIGNAL CIRCUIT.
1) Check harness continuity between E.C.U. terminal 4 and E.C.C.S. relay terminal 2.
Continuity should exist.
N.G.
Check the following.
Check the following.
• Harness connectors F22, M18
• 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.
5
CHECK INPUT SIGNAL CIRCUIT.
1) Turn ignition switch "ON".
2) Check voltage between E.C.U. terminal 36 and ground.
Voltage: Battery voltage
N.G.
Check the following.
Check the following.
• Harness connectors F21, M17
• Harness continuity between E.C.U. and ignition switch
If N.G., repair harness or connectors.
O.K.
6
CHECK COMPONENT (E.C.C.S. relay). Refer to "Electrical Components Inspection". (See page EF&EC-171 - 180)
N.G.
Replace E.C.C.S. relay.
O.K.
7
Check E.C.U. pin terminals for damage or poor connection of E.C.U. harness connector.
See also
EF & EC-171 · EF & EC-180