TOHATSU BFT75A - Page 204

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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 open and short circuit between the knock
sensor 1P connector main wire harness side
No.1 (Red/Blue) terminal and ECM connector B
No.29 (Red/Blue) terminal.
Is the knock sensor line open or short?
YES – Repair open or short in the Red/Blue wire.
NO – Replace the knock sensor with a new one
and recheck. If the knock sensor is
replaced, but MIL blinks 23, replace the
ECM with a new one and recheck.
MIL BLINKS 24 (2 LONG BLINKS AND 4 SHORT BLINKS)
ECT SENSOR 2
• When the MIL blinks 6, 7, 10, 22, 24, and 25 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 , ECM connector B ,
and joint connector 2 , and then reconnect
them.
Clear the DTC (page 5-5).
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 failure (code does not
reappear)
G
25
ECM
SG2
28
ECT
SENSOR 2
2
17
1
R/Bl
22
TOH1
29
R/Bl
G
5V
21
19
GG
12
JOINT CONNECTOR 2
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