Diagnostic Procedure 34 (Cont'd)
EF & EC-325flowchartIdle speed spec differs by transmission: 750 ± 50 rpm (M/T), 800 ± 50 rpm (A/T) in "N" position.
Diagnostic Procedure 34 (Cont'd)
1
INSPECTION START
2
CHECK OVERALL FUNCTION. 1) Start engine and warm it up sufficiently. 2) Check idle speed. 750 ± 50 rpm (M/T), 800 ± 50 rpm (A/T) (in "N" position). 3) Disconnect A.A.C. valve harness connector. 4) Make sure that idle speed drops.
Drops
INSPECTION END
Does not drop
3
CHECK POWER SUPPLY. 1) Stop engine. 2) Turn ignition switch "ON". 3) Check voltage between terminal (b) and ground. Voltage: Battery voltage
N.G.
Check the following. - Harness connectors F33, M37 - 10A fuse - Harness continuity between A.A.C. valve and fuse. If N.G., repair harness or connectors.
O.K.
4
CHECK OUTPUT SIGNAL CIRCUIT. [With CONSULT] 1) Reconnect A.A.C. valve harness connector. 2) Perform "AAC VALVE OPENING TEST" in "ACTIVE TEST" mode with CONSULT. OR [Without CONSULT] 1) Turn ignition switch "OFF". 2) Disconnect E.C.U. harness connector. 3) Check harness continuity between E.C.U. terminal 113 and terminal (a). Continuity should exist.
N.G.
Repair harness or connectors.
O.K.
5
CHECK COMPONENT (A.A.C. valve). Refer to "Electrical Components Inspection". (See page EF & EC-350.)
N.G.
Replace A.A.C. valve.
O.K.
6
Check E.C.U. pin terminals for damage or the connection of E.C.U. harness connector.