TOHATSU BFT 250A, Service Manual

Page: 156 / 639

5-34
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FUEL SYSTEM
DTC 14-1 (ABNORMAL IAC VALVE)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the IAC valve 2P connector
, ECM
connector B and then reconnect them.
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
clear.
Start the engine and check the DTC using the HDS.
Does the DTC 14-1 appear?
YES – GO TO STEP 2.
NO – Temporary failure (code does not
reappear).
2. IAC valve inspection
Turn the combination switch OFF and disconnect
the IAC valve 2P connector
.
Inspect the IAC valve (page 5-125).
Is the IAC valve correct?
YES – Repair open or short in the main wire
harness between the ECM and IAC valve.
If main wire harness is correct, replace the
ECM with a new one and recheck.
NO – Replace the IAC valve with a new one and
recheck.
Bl: Black
Y: Yellow
Bu: Blue
G: Green
R: Red
W: White Br: Brown
O: Orange
Lb: Light blue
Lg: Light green
P: Pink
Gr: Gray
ECM
IAC
VALVE
2
EACVP
36
18
EACVM Bl
G
Bl
1
G