TOHATSU BFT 250A, Service Manual

Page: 174 / 639

5-52
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FUEL SYSTEM
MIL BLINKS 4 TIMES (CKP SENSOR)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the CKP sensor 2P connector
,
ECM connector A and then reconnect them.
Reset the ECM (page 5-6).
Start the engine.
Turn the combination switch OFF and connect the
SCS service connector.
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 4 times?
YES – GO TO STEP 2.
NO – Temporary failure (code does not
reappear)
2. CKP sensor installation inspection
Turn the combination switch OFF.
Inspect the CKP sensor installation (page 5-102).
Is the CKP sensor installed correctly?
YES – GO TO STEP 3.
NO – Install the CKP sensor correctly and
recheck.
3. CKP sensor inspection
Turn the combination switch OFF.
Inspect the CKP sensor (page 5-123).
Is the CKP sensor correct?
YES – Repair the open or short circuit in the CKP
sensor harness between the CKP sensor
and ECM. If the main wire harness is
correct, replace the ECM with a new one
and recheck.
NO – Replace the CKP sensor with a new one
and recheck.
Bl: Black
Y: Yellow
Bu: Blue
G: Green
R: Red
W: White Br: Brown
O: Orange
Lb: Light blue
Lg: Light green
P: Pink
Gr: Gray
Bu CRKP
ECM
CKP
SENSOR
20
1
21
CRKM W
Bu
W
2
W
Bu