TOHATSU BFT250A Service Manual page 181

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2. VTEC spool solenoid valve inspection
Turn the combination switch OFF and disconnect
the VTEC spool solenoid valve 1P connector
Inspect the VTEC spool solenoid valve (page 5-
125).
Is the VTEC spool solenoid valve correct?
YES
NO
MIL BLINKS 23 TIMES (2 LONG BLINKS AND 3 SHORT BLINKS) KNOCK
SENSOR
ECM
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the knock sensor 1P connector
ECM connector B
Reset the ECM (page 5-6).
Start the engine and let it run at 3,000 min
5 minutes or more under no load until the engine
temperature is over 85 °C (185 °F).
Lower the engine speed gradually and run it at
3,000 – 4,000 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 23 times?
YES
NO
– Repair open or short in the main wire
harness between the ECM and VTEC
spool solenoid valve. If main wire harness
is correct, replace the ECM with a new one
and recheck.
– Replace the VTEC spool solenoid valve
with a new one and recheck.
KS R/Bu
, switch wire 6P connector
and then reconnect them.
-1 (rpm) for 10 seconds.
– GO TO STEP 2.
– Temporary failure
reappear).
.
R/Bu R/Bu
,
-1 (rpm) for
(code does not
FUEL SYSTEM
KNOCK
SENSOR
R/Bu
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
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