TOHATSU BFT115A Service Manual page 143

DTC 4-1, 4-2 (NO CKP SENSOR PULSE OR ABNORMAL CKP SENSOR
PULSE)
ECM
12
5 V
CRK Bu
DTC 4-1 (NO CKP SENSOR PULSE)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the CKP sensor 3P connector
ECM connector A
, and then reconnect them.
29
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
clear.
Start the engine and check the DTC using the HDS.
Does the DTC 4-1 appear?
YES – GO TO STEP 2.
NO – Temporary
reappear)
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
9
(Yellow/Black) terminal and engine ground.
Does battery voltage exist?
YES – GO TO STEP 3.
NO – 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).
No. 9
FUSE
(15 A)
29
GND2
JOINT
CONNECTOR 1
, and joint connector 1
12
failure (code does
.
9
main wire harness side No.3
3
CKP SENSOR
16
Y/Bl
Bu
9
G/Bl G/Bl
20
18
Bl Black
Y Yellow
Bu Blue
G Green
R Red
W White
,
9
not
CKP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
IGP2
(Yellow/Black)
FUEL SYSTEM
Br Brown
O Orange
Lb Light blue
Lg
Light green
P Pink
Gr Gray
9
5-25