TOHATSU BFT250A Service Manual page 150

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FUEL SYSTEM
DTC 7-1, 7-2 (TP SENSOR VOLTAGE IS TOO LOW OR TOO HIGH)
ECM
THL
5 V
VCC2
SG2
DTC 7-1 (TP SENSOR VOLTAGE IS TOO LOW)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the TP sensor 3P connector
ECM connector A
joint connector 1
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
clear.
Turn the combination switch ON.
Measure the TP sensor voltage using the HDS.
Is the measurement within 0.23 – 4.89 V?
YES
NO
2. TP sensor power/signal
inspection
Turn the combination switch OFF and disconnect
the TP sensor 3P connector
Turn the combination switch ON.
Measure the voltage between the TP sensor 3P
connector
terminal and No.2 (Red/Black) terminal.
Is the measurement within 4.75 – 5.25 V?
YES
NO
5-28
R/Bl
Bu
G
JOINT CONNECTOR 1
, ECM connector B
and then reconnect them.
– Temporary failure (code
reappear).
– GO TO STEP 2.
line
.
main wire harness side No.3 (Blue)
– GO TO STEP 3.
– • Repair open in the Blue wire between
the ECM and TP sensor
• Repair open in the Red/Black wire
between the ECM and TP sensor
• If the main wire harness is correct,
replace the ECM with a new one, and
recheck
3 8
,
,
does not
open circuit
TP SENSOR
Bu
R/Bl
G
Bl: Black Br: Brown
Y: Yellow O: Orange
Bu: Blue Lb: Light blue
G: Green Lg: Light green
R: Red P: Pink
W: White Gr: Gray
TP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
VCC2
THL
(Blue)
(Red/Black)