TROUBLE DIAGNOSES - Diagnostic Procedure 31 (Cont'd)
EF & EC-4025flowchartDiagnostic Procedure 31 (Cont'd)
1
INSPECTION START
2
CHECK OVERALL FUNCTION. 1) Start engine. 2) Perform POWER BALANCE in ACTIVE TEST mode with CONSULT. 3) Make sure that each circuit produces a momentary engine speed drop. OR Listen to each injector operating sound. Clicking noise should be heard.
OK
INSPECTION END
NG
3
CHECK POWER SUPPLY. 1) Stop engine. 2) Disconnect injector harness connector. 3) Turn ignition switch ON. 4) Check voltage between each injector terminal b and ground. Voltage: Battery voltage
NG
Check the following: Harness connectors F21, M17 (LHD models); Harness connectors F28, M23 (RHD models); Harness connectors M59, E55 (LHD models); Harness connectors M3, E1 (RHD models); 30A fuse (fusible link and fuse box); Harness continuity between battery and injector; Condition and operation of ignition switch. If NG, repair harness or connectors.
Check the following: Harness connectors F21, M17 (LHD models); Harness connectors F28, M23 (RHD models); Harness connectors M59, E55 (LHD models); Harness connectors M3, E1 (RHD models); 30A fuse (fusible link and fuse box); Harness continuity between battery and injector; Condition and operation of ignition switch. If NG, repair harness or connectors.
OK
4
CHECK OUTPUT SIGNAL CIRCUIT. 1) Turn ignition switch OFF. 2) Disconnect ECM harness connector. 3) Check harness continuity between injector terminals a and ECM terminals 101, 110, 103, 112. Continuity should exist.
NG
Repair harness or connector.
OK
5
CHECK COMPONENT (Injector). Refer to Electrical Components Inspection.
NG
Replace injector.
OK
6
Check ECM pin terminals for damage or poor connection of ECM harness connector.
See also
EF & EC-4039