1999 HONDA CIVIC Engine

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Page 455 of 2189

HONDA CIVIC 1999 6.G Workshop Manual PGM-FI System
Crankshaft Speed Fluctuation (GKFI Sensor(99 - 00 Models except D16YS engine with M/Tl (cont,d)I\
ECM/PCM CONNECTOR C 13lPI
Wire side of femaleterminals
aI
(Frorn page l1-185)
Check Ior

Page 456 of 2189

HONDA CIVIC 1999 6.G Workshop Manual l,a
Crankshaft Position/Top Dead Center/Cylinder Position (CKP/TDC/CYPI Sensor
Thescantoo|indicatesDiagnosticTroub|ecode(DTc)P1359:Aprob|eminthecrankshaftPosjtion/TopDead
Center/Cvlinder Position (CKP

Page 458 of 2189

HONDA CIVIC 1999 6.G Workshop Manual [F16551l Th" ""un toot indicates Diagnostic Trouble Code (DTC) P1681: TIVA,/TMB signal line failure
Problem verification:1. Do the ECM Reset Procedure.
2. Drive the vehicle Ior several
miles at varyin

Page 459 of 2189

HONDA CIVIC 1999 6.G Workshop Manual ldle Control System
System Description
The idle speed ot the engine is controlled by the ldle Air Control (lAC) Valve.The valve changes the amount of air bypassing into the intake manifold in response

Page 460 of 2189

HONDA CIVIC 1999 6.G Workshop Manual 1.After the engine starts, the lAc valve opens for a certain time. The amount of air is increased to raise the idle speed
about 150 - 300 rpm.
When the coolant temperature is tow, the IAC valve is ope

Page 461 of 2189

HONDA CIVIC 1999 6.G Workshop Manual ldle Control System
ldle ControlSystem
lF0505 l Th" """n tool indicates Diagnostic Trouble Code (DTC) PO5O5: tdte controt system malfunction.
NOTE: lf DTC P1508 or P1509 is stored at the same time as

Page 462 of 2189

HONDA CIVIC 1999 6.G Workshop Manual I
L
1D16Y5, D16Y8 engine with M/T 81642 engine)I
D16Y7 engine:
{From page 11-192)
Check the IAC valve:Disconnect the 3P connector from
the IAC valve.
Check the IAC valve:Disconnect the 2P connectorfro

Page 463 of 2189

HONDA CIVIC 1999 6.G Workshop Manual ldle Control System
ldle Air Control (lACl Vatve (96 - 98 Dl6ys, Dl6yB engine with M/Tl
The scan tool indicates Diagnostic Trouble Code (DTC) P1508: A problem in the ldle Air Controt flAC) varvecircu