TOHATSU BFT250A Service Manual page 155

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DTC 10-2 (IAT SENSOR VOLTAGE IS TOO HIGH)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the IAT sensor 2P connector
ECM connector A
joint connector 1
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
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) terminal.
Is the measurement within 4.75 – 5.25 V?
YES
NO
, ECM connector B
and then reconnect them.
clear.
– Temporary failure
reappear).
– GO TO STEP 2.
.
main wire harness side No.1 (Red/
– Replace the IAT sensor with a new one
and recheck.
– Repair open in the Red/Yellow or Green/
Red wire harness between the ECM and
IAT sensor. If the main wire harness is
correct, replace the ECM with a new one
and recheck.
,
,
(code does not
FUEL SYSTEM
IAT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
SG2
TA
(Green)
(Red/Yellow)
5-33