HONDA marine BF135A, Руководство по ремонту, Страница: 33 / 49

5-30
• IAC Valve Troubleshooting
DTC 14-1: IAC valve current is abnormal
1. Symptom reproduction test
-1. Connect the Dr. H and clear the DTC once. If the
DTC can not be cleared, go on the troubleshooting.
-2. Start the engine and let it run at idling under no load.
-3. Measure the engine speed using the Dr. H.
Is the engine speed 650 min -1 (rpm) or above?
YES – Temporary failure (Disappeared)
NO – Perform “2. IAC valve open circuit check”.
2. IAC valve open circuit check
-1. Turn the ignition switch OFF and disconnect the IAC
valve 2P connector.
-2. Measure the resistance between the No. 1 and No. 2
terminals of the IAC valve.
Is the measured resistance 8 – 12 ?
YES – Perform “3. IAC valve short circuit check”.
NO – Replace the IAC valve.
3. IAC valve short circuit check
-1. Check for the continuity between the IAC valve No. 1
terminal and the body ground.
Is there the continuity?
YES – Replace the IAC valve.
NO – Go to the step 2.
-2. Check for the continuity between the IAC valve No. 2
terminal and the body ground.
Is there the continuity?
YES – Replace the IAC valve.
NO – Perform “4. IAC valve line open circuit
check”.
4. IAC valve line open circuit check
-1. Connect the IAC valve 2P connector.
-2. Disconnect the ECM connector B.
-3. Measure the resistance between the No. 26
(Green/White) and the No. 34 (Black) terminals of
the ECM connector B.
Is the measured resistance 10 – 13 ?
YES – Perform “5. IAC valve line short circuit
check”.
NO – Repair open in the wire between the ECM
and the IAC valve.
IAC VALVE SIDE 2P
CONNECTOR
VIEWED FROM THE
TERMINAL SIDE
IAC VALVE SIDE 2P
CONNECTOR
VIEWED FROM THE
TERMINAL SIDE
IAC VALVE SIDE 2P
CONNECTOR
VIEWED FROM THE
TERMINAL SIDE
ECM CONNECTOR B
VIEWED FROM THE
TERMINAL SIDE
EACVM
(BLACK)
EACVP
(GREEN/WHITE)