TOHATSU BFT250A Service Manual page 171

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8. Trim angle sensor power line short circuit
inspection 2
Measure the voltage between the trim angle sensor
3P connector
(Brown/White) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES
NO
MIL BLINKS ONCE (HO2S)
ECM
O2
SG2
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the HO2S 4P connector
connector A
connector 1
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 1 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 once?
YES
NO
main wire harness side No.3
– Replace the ECM with a new one and
recheck.
– Repair short in the main wire harness
between the ECM and the trim angle
sensor.
Bl/Y
G
3
7
JOINT CONNECTOR 1
, ECM connector B
and then reconnect them.
– GO TO STEP 2.
– Temporary failure (code
reappear).
TRIM ANGLE SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
Bl/Y Bl
G Gr
, ECM
, joint
-1 (rpm) for
does not
FUEL SYSTEM
VCC3
(Brown/White)
HO2S
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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