Diagnostic Procedure 14 — Engine Stalls after Decelerating
EF & EC-451flowchartSR20DE engine. Uses CONSULT ACTIVE TEST and WORK SUPPORT modes.
TROUBLE DIAGNOSES
Diagnostic Procedure 14 — Engine Stalls after Decelerating
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-506.)
Yes
2
CHECK IDLE ADJ. SCREW CLOGGING. 1. Perform 'IGN TIMING ADJ' in 'WORK SUPPORT' mode. 2. Can you set engine rpm at 800±50 rpm (in 'N' position) by turning idle adjusting screw? — OR — 1. Disconnect throttle sensor harness connector. 2. Can you set engine rpm at 800±50 rpm (in 'N' position) by turning idle adjusting screw?
No
Check for I.A.S. clogging or throttle chamber clogging.
Yes
3
Go to A on next page.