TOHATSU BFT75A Service Manual page 189

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FUEL SYSTEM
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
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the HO2S 4P connector
connector A
connector 2
Clear the DTC (page 5-5).
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
5-48
main wire harness side No.3
– Replace the ECM with a new one and
recheck.
– Repair short in the Brown/White wire.
29
O2 Bl/Y
SG2 G
28
12
21
, ECM connector B
and then reconnect them.
– GO TO STEP 2.
– Temporary failure (code
reappear).
TRIM ANGLE SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
25
Bl/Y
G
17
JOINT
CONNECTOR 2
, ECM
, joint
-1
(rpm) for
does not
VCC3
(Brown/White)
HO2S
Bl
Gr
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