TOHATSU BFT75A - Page 206

5-65
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FUEL SYSTEM
2. ECT sensor 3 signal line open or short circuit/
GND line open circuit inspection
Turn the combination switch OFF and disconnect
the ECT sensor 3 (2P) connector .
Turn the combination switch ON.
Measure the voltage between the ECT sensor 3
(2P) connector main wire harness side No.1
(Red) terminal and No.2 (Green) terminal.
Is the measurement within 4.75 – 5.25 V?
YES – Replace the ECT sensor 3 with a new one
and recheck.
NO – Repair open or short in the Red wire or
open in the Green wire. If the main wire
harness is normal, replace the ECM with a
new one and recheck.
MIL BLINKS 41 (4 LONG BLINKS AND ONE SHORT BLINK)
HO2S HEATER
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the HO2S 4P connector , ECM A
connector , and joint connector 1 , and
then reconnect them.
Clear the DTC (page 5-5).
Start the engine and let it run at 3,000 min
-1
(rpm) for
5 minutes or more under no load.
Turn the combination switch OFF and connect the
SCS service check connector.
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 41?
YES – GO TO STEP 2.
NO – Temporary failure (code does not
reappear)
ECT SENSOR 3 (2P) CONNECTOR
MAIN WIRE HARNESS SIDE
TOH2
(Red)
SG2
(Green)
W
W
34
W/Bl
Y/Bl
W/Bl
18
ECM
O2HT
25
29
HO2S
HEATER
16
17
13
JOINT
CONNECTOR 1
Y
No.4
FUSE
(10 A)
BLACK
YELLOW
BLUE
GREEN
RED
WHITE
BROWN
ORANGE
LIGHT BLUE
LIGHT GREEN
PINK
GRAY
Bl
Y
Bu
G
R
W
Br
O
Lb
Lg
P
Gr