TOHATSU BFT75A Service Manual page 174

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DTC 14-1 (IAC VALVE CONTROL FAILURE)
ECM
12V
EACVP
EACVM
Bl BLACK Br BROWN
Y YELLOW O ORANGE
Bu BLUE Lb LIGHT BLUE
G GREEN Lg LIGHT GREEN
R RED P PINK
W WHITE Gr GRAY
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the IAC valve 2P connector
ECM connector B
Clear the DTC (page 5-5).
• Continue the procedure if the DTC does not
clear.
Start the engine and check the DTC using the Dr.H.
Does the DTC 14-1 appear?
YES
NO
2. IAC valve inspection
Turn the combination switch OFF.
Inspect the IAC valve (page 5-107).
Is the IAC valve normal?
YES
NO
G
Bl
28
, and then reconnect them.
– GO TO STEP 2.
– Temporary failure (code
reappear)
– Repair open or short in the Green wire or
Black wire between the ECM and IAC
valve. If main wire harness is normal,
replace the ECM with a new one and
recheck.
– Replace the IAC valve with a new one and
recheck.
and
does not
FUEL SYSTEM
IAC
VALVE
27
G
Bl
5-33