TOHATSU BFT115A Service Manual page 189

MIL BLINKS 24 (2 LONG BLINKS AND 4 SHORT BLINKS)
ECT SENSOR 2
ECM
12
5V
TOH1 R/Bl
SG2
13
• When the MIL blinks 6, 7, 10, 22, 24, 25, and 27 at
the same time, the ground line (SG2) is open.
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the ECT sensor 2 (2P) connector
ECM connector A
and joint connector 2
them.
Clear the DTC (page 5-6).
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 24?
YES – GO TO STEP 2.
NO – Temporary
reappear)
2. ECT sensor 2 signal line open or short circuit/
GND line open circuit inspection
Turn the combination switch OFF and disconnect
the ECT sensor 2 (2P) connector
Turn the combination switch ON.
Measure the voltage between the ECT sensor 2
(2P) connector
(Red/Black) terminal
terminal.
Is the measurement within 4.75 – 5.25 V?
YES – Replace the ECT sensor 2 with a new one
and recheck.
NO – Repair open or short in the Red/Black wire
or open in the Green/Red wire. If the main
wire harness is normal, replace the ECM
with a new one and recheck.
G/R
G/R
28
21
JOINT
CONNECTOR 2
, ECM connector B
12
, and then reconnect
28
failure (code does
.
1
main wire harness side No.1
1
and No.2 (Green/Red)
R/Bl
G/R
G/R
19
Bl Black
Y Yellow
Bu Blue
G Green
R Red
W White
,
1
,
13
not
ECT SENSOR 2 (2P) CONNECTOR
MAIN WIRE HARNESS SIDE
SG2
(Green/Red)
FUEL SYSTEM
ECT SENSOR 2
1
Br Brown
O Orange
Lb Light blue
Lg
Light green
P Pink
Gr Gray
1
TOH1
(Red/Black)
5-71