TOHATSU BFT75A Service Manual page 168

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DTC 7-1, 7-2 (TP SENSOR VOLTAGE IS TOO LOW OR TOO HIGH)
ECM
THL
5 V
VCC2
SG2
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
DTC 7-1 (TP SENSOR VOLTAGE IS TOO LOW)
• When the DTC code 7-1 and 22-1 or 22-2 are
indicated at the same time, the power line (VCC2) is
open.
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the TP sensor 3P connector
ECM connector A
and joint connector 2
them.
Clear the DTC (page 5-5).
• Continue the procedure if the DTC does not
clear.
Turn the combination switch ON.
Measure the TP sensor voltage using the Dr.H.
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.
s the measurement within 4.75 – 5.25 V?
YES
NO
29
R/Bl
Bu
G
28
12
21
JOINT
CONNECTOR 2
, ECM connector B
, and then reconnect
– Temporary failure (code
reappear)
– GO TO STEP 2.
line open circuit
.
main wire harness side No.1 (Blue)
– GO TO STEP 3.
– • Repair open in the Blue wire.
• Repair open in the Red/Black wire.
• If the main wire harness is normal,
replace the ECM with a new one, and
recheck.
Bu
R/Bl
G
G G
15
,
,
does not
TP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
THL
(Red/Black)
FUEL SYSTEM
TP
SENSOR
21
VCC2
(Blue)
5-27