TOHATSU 200 Series Service Manual page 78

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FUEL SYSTEM
DTC 21-1 (ABNORMAL OUTPUT OF
VTEC SPOOL SOLENOID VALVE)
(BF225 only)
(*) Refer
(BF175AK1·200AK1·225AK1: 62ZY300).
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the VTEC spool solenoid valve 1P
connector
reconnect them.
Clear the DTC (page 5-2).
• Continue the procedure if the DTC does not
clear.
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
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-
133*).
Is the VTEC spool solenoid valve correct?
YES
NO
5-22
to page of base
, ECM connector B
(rpm) for a few seconds.
– GO TO STEP 2.
– Temporary failure (code
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.
shop manual
and then
-1
(rpm) for
.
does not
.