TOHATSU BFT75A Service Manual page 162

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2. MAP sensor signal line short circuit inspection
Turn the combination switch OFF and disconnect
the MAP sensor 3P connector
Turn the combination switch ON.
Measure the voltage between the MAP sensor 3P
connector
(White/Red) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES
NO
3. MAP sensor power line open circuit inspection
Measure the voltage between the MAP sensor 3P
connector
(Brown/Yellow) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES
NO
DTC 3-2 (MAP SENSOR VOLTAGE IS TOO HIGH)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the MAP sensor 3P connector
ECM connector A
and then reconnect them.
Clear the DTC (page 5-5).
• Continue the procedure if the DTC does not
clear.
Turn the combination switch ON.
Measure the MAP sensor voltage using the Dr.H.
Is the measurement within 0.23 – 4.49 V?
YES
NO
main wire harness side No.2
– GO TO STEP 3.
– Repair open in the White/Red wire. If the
main wire harness is normal, replace the
ECM with a new one and recheck.
main wire harness side No.1
– Replace the MAP sensor with a new one
and recheck.
– Repair open in the Brown/Yellow wire. If
the main wire harness is normal, replace
the ECM with a new one and recheck.
, ECM connector B
– Temporary failure (code
reappear).
– GO TO STEP 2.
.
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
,
does not
FUEL SYSTEM
PB
(White/Red)
VCC1
(Brown/Yellow)
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