TOHATSU BFT250A Service Manual page 145

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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
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 5-6).
• Continue the procedure if the DTC does not
Turn the combination switch ON.
Measure the MAP sensor voltage using the HDS.
Is the measurement within 0.23 – 4.49 V?
YES
NO
2. MAP sensor power line open 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
(Brown/Yellow) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES
NO
main wire harness side No.2
– Replace the MAP sensor with a new one
and recheck.
– Repair short in the main wire harness
between the ECM and MAP sensor. If the
main wire harness is correct, replace the
ECM with a new one and recheck.
, ECM connector B
clear.
– Temporary failure
reappear).
– GO TO STEP 2.
main wire harness side No.1
– GO TO STEP 3.
– Repair open in the main wire harness
between the ECM and MAP sensor. If the
main wire harness is correct, replace the
ECM with a new one and recheck.
.
,
(code does not
.
FUEL SYSTEM
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
PB
(White/Red)
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
VCC1
(Brown/Yellow)
5-23