TOHATSU BFT75A Service Manual page 158

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2. DLC signal line short circuit inspection
Measure the voltage between the DLC
(Light green) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES
NO
3. MIL ON line short circuit inspection
Turn the combination switch OFF.
Disconnect ECM connector A
Turn the combination switch ON and check the MIL.
Does the MIL go OFF?
YES
NO
4. MAP sensor power line short circuit inspection 1
Turn the combination switch OFF.
Connect ECM connector A
Disconnect the MAP sensor 3P connector
Turn the combination switch ON and check the MIL.
Does the MIL go OFF?
YES
NO
5. MAP sensor power line short circuit inspection 2
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
6. TP sensor power line short circuit inspection 1
Turn the combination switch OFF.
Disconnect the TP sensor 3P connector
Turn the combination switch ON and check the MIL.
Does the MIL go OFF?
YES
NO
– GO TO STEP 3.
– Repair short in the main wire harness
between the ECM and the DLC.
– GO TO STEP 4.
– Repair short in the main wire harness
between the ECM and the MIL.
.
– Replace the MAP sensor.
– GO TO STEP 5.
main wire harness side No.1
– GO TO STEP 6.
– Repair short in the main wire harness
between the ECM and the MAP sensor.
– Replace the TP sensor.
– GO TO STEP 7.
No.4
SCS
(Light green)
.
.
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
.
FUEL SYSTEM
DLC
VCC1
(Brown/Yellow)
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