TOHATSU BFT75A Service Manual page 190

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2. HO2S inspection
Turn the combination switch OFF.
Inspect the HO2S (page 5-108).
Is the HO2S correct?
YES
NO
3. Fuel supply system inspection
Measure the fuel pressure (page 5-97).
Is the fuel pressure normal?
YES
NO
MIL BLINKS 3 TIMES (MAP SENSOR)
ECM
5V
5V
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).
Start the engine.
Turn the combination switch OFF and connect the
SCS service check connector.
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 3 times?
YES
NO
– GO TO STEP 3.
– Replace the HO2S with a new one and
recheck.
– Repair open or short in the main wire
harness between the ECM and HO2S. If
the main wire harness is correct, replace
the ECM with a new one, and recheck.
– Repair fuel supply system and recheck
under normal fuel pressure.
29
PB W/R
VCC1 Br/Y
SG1 G
28
, ECM connector B
– GO TO STEP 2.
– Temporary failure
reappear)
,
(code does not
FUEL SYSTEM
Bl Br BROWN
BLACK
Y YELLOW O ORANGE
Bu BLUE Lb LIGHT BLUE
G GREEN Lg LIGHT GREEN
R RED P PINK
W WHITE Gr GRAY
MAP
SENSOR
26
Br/Y
W/R
G
5-49