Diagnostic Procedure 33 (Cont'd) — A.A.C. VALVE
EF & EC-159flowchartTROUBLE DIAGNOSES
Diagnostic Procedure 33 (Cont'd)
A.A.C. valve diagnostic procedure
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INSPECTION START
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A — CHECK OVERALL FUNCTION. 1) Start engine and warm it up sufficiently. 2) Check idle speed. 800 ± 50 rpm 3) Perform "IGN TIMING ADJ" in "WORK SUPPORT" mode. OR Disconnect throttle sensor harness connector. Make sure that idle speed drops.
Drops
INSPECTION END
Does not drop
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B — CHECK POWER SUPPLY. 1) Stop engine. 2) Disconnect A.A.C. valve harness connector. 3) Check voltage between A.A.C. valve connector terminal (c) and ground. Voltage: Battery voltage
N.G.
Check the following. - Harness connectors F22, M18. - 10A fuse. - Harness continuity between A.A.C. valve and fuse. If N.G., repair harness or connectors.
O.K.
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C — CHECK OUTPUT SIGNAL CIRCUIT. 1) Reconnect A.A.C. valve harness connector. 2) Perform "AAC VALVE SYSTEM" in "FUNCTION TEST" mode with CONSULT. OR 2) Perform "AAC VALVE OPENING TEST" in "ACTIVE TEST" mode with CONSULT. OR 1) Disconnect E.C.U. harness connector. 2) Check harness continuity between E.C.U. terminal 111 and A.A.C. valve connector terminal (d), E.C.U. terminal 113 and A.A.C. valve connector terminal (b). Continuity should exist.
N.G.
Repair harness or connectors.
O.K.
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(A) — continues to next page