TOHATSU BFT250A Service Manual page 157

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DTC 21-1 (ABNORMAL OUTPUT OF VTEC SPOOL SOLENOID VALVE)
ECM
12 V
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the VTEC spool solenoid valve 1P
connector
reconnect them.
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
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
min
Recheck the DTC with the HDS.
Does the DTC 21-1 appear?
YES
NO
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
VTS G/Y
, ECM connector B
clear.
-1 (rpm) for a few seconds.
– GO TO STEP 2.
– Temporary failure
reappear).
– Repair open 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.
G/Y G/W
and then
-1
(rpm) for
.
(code does not
.
FUEL SYSTEM
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
5-35