TROUBLE DIAGNOSES - Diagnostic Procedure 22 (Cont'd)
EF & EC-4011flowchartDiagnostic Procedure 22 (Cont'd)
1
Continued (A) from previous page
2
CHECK VOLTAGE BETWEEN ECM AND GROUND. 1) Check voltage between ECM terminal 46 and ground. Voltage: Battery voltage
NG
Check the following: Harness connectors F21, M17 (LHD models); Harness connectors F28, M22 (RHD models); Harness connectors M59, E55 (LHD models); Harness connectors M3, E1 (RHD models); 10A fuse (fusible link and fuse box); Harness continuity between ECM and battery. If NG, replace fuse or repair harness or connectors.
Check the following: Harness connectors F21, M17 (LHD models); Harness connectors F28, M22 (RHD models); Harness connectors M59, E55 (LHD models); Harness connectors M3, E1 (RHD models); 10A fuse (fusible link and fuse box); Harness continuity between ECM and battery. If NG, replace fuse or repair harness or connectors.
OK
3
CHECK GROUND CIRCUIT. 1) Check harness continuity between ECM terminals 39, 48 and engine ground. Continuity should exist.
NG
Repair harness or connectors.
OK
4
CHECK OUTPUT SIGNAL CIRCUIT. 1) Check harness continuity between ECM harness connector terminal 4 and ECCS relay terminal 2. Continuity should exist.
NG
Check the following: Harness connectors F22, M18; Harness connectors M58, E55 (LHD models); Harness connectors M3, E1 (RHD models); Harness continuity between ECM and ECCS relay. If NG, repair harness or connectors.
Check the following: Harness connectors F22, M18; Harness connectors M58, E55 (LHD models); Harness connectors M3, E1 (RHD models); Harness continuity between ECM and ECCS relay. If NG, repair harness or connectors.
OK
5
CHECK INPUT SIGNAL CIRCUIT. 1) Turn ignition switch ON. 2) Check voltage between ECM terminal 12 (Except Australia), 36 (Australia) and body ground. Voltage: Battery voltage
NG
Check the following: Harness connectors F21, M17 (LHD models); Harness connectors F28, M22 (RHD models); Harness continuity between ECM and ignition switch; Condition and operation of ignition switch; 30A fusible link; Harness continuity between ignition switch and 30A fusible link. If NG, replace fusible link or repair ignition switch, harness or connectors.
Check the following: Harness connectors F21, M17 (LHD models); Harness connectors F28, M22 (RHD models); Harness continuity between ECM and ignition switch; Condition and operation of ignition switch; 30A fusible link; Harness continuity between ignition switch and 30A fusible link. If NG, replace fusible link or repair ignition switch, harness or connectors.
OK
6
CHECK COMPONENT (ECCS relay). Refer to Electrical Components Inspection.
NG
Replace ECCS relay.
OK
7
Check ECM pin terminals for damage or poor connection of ECM harness connector.
See also
EF & EC-4039