Diagnostic Procedure 14 — Engine Stalls after Decelerating
EF & EC-275flowchartApplies to GA16DE engine (header tag). Idle rpm differs M/T (675 ± 50) vs A/T (725 ± 50, in N position). Uses CONSULT ACTIVE TEST and WORK SUPPORT modes.
Diagnostic Procedure 14 — Engine Stalls after Decelerating
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1: CHECK A.A.C. VALVE. 1. Select "A.A.C. VALVE OPENING" in "ACTIVE TEST" mode. 2. When touching "Qu" and "Qd", does the engine speed change according to the percent of A.A.C. valve opening? — OR — When disconnecting A.A.C. valve harness connector, does the engine speed drop?
No
Check A.A.C. valve and circuit. (See page EF & EC-324.)
Yes
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2: CHECK IDLE ADJ. SCREW CLOGGING. 1. Perform "IGN TIMING ADJ" in "WORK SUPPORT" mode. 2. Can you set engine rpm at 675 ± 50 rpm (M/T), 725 ± 50 rpm (A/T) (in "N" position) by turning idle adjusting screw? — OR — 1. Disconnect throttle sensor harness connector. 2. Can you set engine rpm at 675 ± 50 rpm (M/T), 725 ± 50 rpm (A/T) (in "N" position) by turning idle adjusting screw?
No
Check for IAS clogging or throttle chamber clogging.
Yes
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(Go to (A) on next page.)