TOHATSU BFT 250A, Service Manual

Page: 183 / 639

5-61
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FUEL SYSTEM
2. EMT sensor 1 signal /GND line open circuit
inspection
Turn the combination switch OFF and disconnect
the EMT sensor 1 2P connector
.
Turn the combination switch ON.
Measure the voltage between the EMT sensor 1 2P
connector
main wire harness side No.1 (Red/
Black) terminal and No.2 (Green) terminal.
Is the measurement within 4.75 – 5.25 V?
YES – Replace the EMT sensor 1 with a new one
and recheck.
NO – Repair open in the Red/Black or Green
wire harness between the ECM and EMT
sensor 1. If the main wire harness is
correct, replace the ECM with a new one
and recheck.
MIL BLINKS 25 TIMES (2 LONG BLINKS AND 5 SHORT BLINK) EMT SENSOR
2
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the EMT sensor 2 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 25 times?
YES – GO TO STEP 2.
NO – Temporary failure (code does not
reappear).
SG2
(Green)
EMT SENSOR 1 2P CONNECTOR
MAIN WIRE HARNESS SIDE
TOH1
(Red/Black)
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
TOH2
ECM
EMT SENSOR 2
R
30
G
2
5 V
SG2
25
G
1
JOINT CONNECTOR 1
R
1 3