TOHATSU BFT250A Service Manual page 186

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FUEL SYSTEM
MIL BLINKS 41 TIMES (4 LONG BLINKS AND ONE SHORT BLINK) HO2S
HEATER
ECM
O2HT
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the HO2S 4P connector
connector A
Reset the ECM (page 5-6).
Start the engine and let it run at 3,000 min
5 minutes or more under no load.
Let the engine idle for a minute or more.
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 41 times?
YES
NO
2. HO2S heater inspection
Turn the combination switch OFF.
Inspect the HO2S heater (page 5-126).
Is the HO2S heater correct?
YES
NO
5-64
W/Bl
Y/Bl
10
, junction box 23P connector
and then reconnect them.
– GO TO STEP 2.
– Temporary failure (code
reappear).
– Repair open in the main wire harness
between the No.3 fuse and the HO2S or
between the HO2S and ECM. If the main
wire harness is correct, replace the ECM
with a new one and recheck.
– Replace the HO2S with a new one and
recheck.
W/Bl
Y/Bl
FUSE/RELAY JUNCTION BOX
No.10
FUSE
(10 A)
, ECM
-1
(rpm) for
does not
HO2S
HEATER
W
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