TOHATSU BFT115A Service Manual page 152

FUEL SYSTEM
DTC 10-2 (IAT SENSOR VOLTAGE IS TOO HIGH)
• When the DTC code 6-2, 7-2, 10-2, 22-2, 140-2,
141-2, and 143-2 are indicated 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).
• Continue the procedure if the DTC does not
clear.
Turn the combination switch ON.
Measure the IAT sensor voltage using the HDS.
Is the measurement within 0.08 – 4.92 V?
YES
NO
2. IAT sensor signal line open circuit inspection
Turn the combination switch OFF and disconnect
the IAT 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
5-34
, ECM connector B
12
, and then reconnect
28
– Temporary failure (code
reappear)
– GO TO STEP 2.
.
25
main wire harness side No.1 (Red/
25
– Replace the IAT sensor with a new one
and recheck.
– Repair open in the Red/Yellow wire or
Green/Red wire. If the main wire harness
is normal, replace the ECM with a new one
and recheck.
,
25
,
13
does not
IAT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
SG2
(Green/Red)
25
TA
(Red/Yellow)