TOHATSU BFT250A Service Manual page 180

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FUEL SYSTEM
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
NO
MIL BLINKS 21 TIMES (2 LONG BLINKS AND ONE SHORT BLINK) VTEC
SPOOL SOLENOID VALVE
ECM
12 V
VTS
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the VTEC spool solenoid valve 1P
connector
reconnect them.
Reset the ECM (page 5-6).
Start the engine and let it run at 3,000 min
5 minutes or more under no load.
Disconnect the neutral switch 2P connector
Raise the engine speed slowly and let it run at 4,500
-1
min
Turn the combination switch OFF and connect the
SCS service connector.
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 21 times?
YES
NO
5-58
– Repair open or short in the main wire
harness between the ECM and IAC valve.
If the main wire harness is correct, replace
the ECM with a new one and recheck.
– Replace the IAC valve with a new one and
recheck.
G/Y G/Y
, ECM connector B
(rpm) for a few seconds.
– GO TO STEP 2.
– Temporary failure (code
reappear).
.
G/W
and then
-1
(rpm) for
.
does not
VTEC
SPOOL
SOLENOID
VALVE
G/W
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