TOHATSU BFT 250A, Service Manual

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FUEL SYSTEM
2. Knock sensor line open or short circuit
inspection
Turn the combination switch OFF.
Disconnect the knock sensor 1P connector
and ECM connector B
.
Check for continuity through the Knock sensor wire.
Is the knock sensor line correct?
YES – GO TO STEP 3.
NO – Repair open or short in the main wire
harness between the ECM and knock
sensor.
3. Knock sensor inspection
Replace the knock sensor with a new one and
connect the knock sensor 1P connector
.
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blinks 23 times?
YES – Replace the ECM with a new one and
recheck.
NO – Faulty original knock sensor. End of
inspection.
MIL BLINKS 24 TIMES (2 LONG BLINKS AND 4 SHORT BLINKS) EMT
SENSOR 1
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the EMT sensor 1 2P connector
,
ECM connector A , ECM connector B ,
joint connector 1 and then reconnect them.
Reset the ECM (page 5-6).
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 24 times?
YES – GO TO STEP 2.
NO – Temporary failure (code does not
reappear).
Bl: Black
Y: Yellow
Bu: Blue
G: Green
R: Red
W: White Br: Brown
O: Orange
Lb: Light blue
Lg: Light green
P: Pink
Gr: Gray
ECM
EMT SENSOR 1
25
TOH1 R/Bl
1
R/Bl
5 V
SG2
22
G
G
2
JOINT CONNECTOR 1
9 3