TOHATSU BFT 250A, Service Manual

Page: 166 / 639

5-44
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FUEL SYSTEM
DTC 142-1 (ABNORMAL EOP SWITCH (HIGH PRESSURE SIDE))
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the EOP switch (High pressure side) 2P
connector
, ECM connector B , switch
wire 6P connector , joint connector 1
and then reconnect them.
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
clear.
Turn the combination switch ON.
Check the EOP switch (high pressure side) signal
with the HDS.
Is there the OFF signal?
YES – Temporary failure (code does not
reappear).
NO – GO TO STEP 2.
2. EOP switch (high pressure side) line open
circuit inspection
Turn the combination switch OFF and disconnect
the EOP switch (high pressure side) 2P connector
.
Turn the combination switch ON.
Measure the voltage between the EOP switch (high
pressure side) 2P connector
main wire
harness side No.1 (Yellow/Red) terminal and No.2
(Green) terminal.
Does battery voltage exist?
YES – Replace the EOP switch (high pressure
side) with a new one and recheck.
NO – Repair open in the main wire harness
between the ECM and EOP switch (high
pressure side). If main wire harness is
correct, replace the ECM 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
ECM
EOP
SWITCH (HIGH)
G
2
12 V
SG2
25
JOINT CONNECTOR 1
30
OPSH Y/R
6
Y/R
G
5
1
G/R
Y/R
G/R
Y/R
1
3
EOP SWITCH (HIGH PRESSURE SIDE)
2P CONNECTOR MAIN WIRE HARNESS SIDE
OPSH
(Yellow/Red)
SG2
(Green)