TOHATSU BFT115A Service Manual page 178

FUEL SYSTEM
2. CKP sensor power line open circuit inspection
Turn the combination switch OFF and disconnect
the CKP sensor 3P connector
Turn the combination switch ON.
Measure the voltage between the CKP sensor 3P
connector
(Yellow/Black) terminal and engine ground.
Does battery voltage exist?
YES
NO
3. CKP sensor signal line open or short circuit/
GND line open circuit inspection
Measure the voltage between the CKP sensor 3P
connector
terminal and No.2 (Green/Black) terminal.
Is the measurement within 4.75 – 5.25 V?
YES
NO
4. CKP sensor installation inspection
Turn the combination switch OFF.
Check the installation of the CKP sensor (page 5-
118).
Is the CKP sensor installation correct?
YES
NO
5-60
9
main wire harness side No.3
9
– GO TO STEP 3.
– Repair open in the Yellow/Black wire. If
main wire harness is normal, inspect the
No.9 fuse circuit in the fuse/relay junction
box (page 10-14).
main wire harness side No.1 (Blue)
9
– GO TO STEP 4.
– • Repair open or short in the Blue wire
• Repair open in the Green/Black wire
• If the main wire harness is normal,
replace the ECM with a new one, and
recheck.
– Replace the CKP sensor with a new one
and recheck. If the CKP sensor is
replaced, but MIL blinks 4, replace the
ECM with a new one and recheck.
– Install the CKP sensor properly, and
recheck.
.
IGP2
(Yellow/Black)
LG1
(Green/Black)
CKP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
9
CKP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
9
CRK
(Blue)