TOHATSU BFT115A Service Manual page 184

FUEL SYSTEM
MIL BLINKS 10 (ONE LONG BLINK AND NO SHORT BLINK) IAT SENSOR
ECM
5V
SG2
• 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 IAT sensor 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 10 (one long blink)?
YES
NO
2. IAT sensor signal open or short circuit/GND line
open circuit inspection
Turn the combination switch OFF and disconnect
the IAT sensor 2P connector
Turn the combination switch ON.
Measure the voltage between the IAT sensor 2P
connector
Yellow) terminal and No.2 (Green/Red) terminal.
Is the measurement within 4.75 – 5.25 V?
YES
NO
5-66
12
TA R/Y
G/R
13
JOINT
CONNECTOR 2
, ECM connector B
12
, and then reconnect
28
– GO TO STEP 2.
– Temporary failure (code
reappear)
25
main wire harness side No.1 (Red/
25
– Replace the IAT sensor with a new one
and recheck.
– • Repair open or short in the Red/Yellow
wire
• Repair 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
13
,
25
,
13
does not
.
IAT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
SG2
(Green/Red)
IAT SENSOR
25
R/Y
G/R
Bl Black Br Brown
Y Yellow O Orange
Bu Blue Lb Light blue
Lg
G Green Light green
R Red P Pink
W White Gr Gray
25
TA
(Red/Yellow)