TOHATSU BFT250A Service Manual page 140

dummyhead dummyhead
FUEL SYSTEM
MIL IS ON BUT DTC IS 0 OR DOES NOT COMMUNICATE
OPTION
COMBINATION
SWITCH
Bl/Y Bl/Y
W/Bl W/Bl
INDICATOR
LAMP (MIL)
Bl/Y Bl/Y
R/Bu R/Bu
1. DLC power/GND line open circuit inspection
Turn the combination switch OFF and disconnect
the HDS.
Turn the combination switch ON.
Measure the voltage at the DLC
(Yellow/Black) terminal and No.2 (Black) terminal.
Does battery voltage exit?
YES
NO
2. DLC signal line short circuit inspection
Measure the voltage between the DLC
(Light green) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES
NO
5-18
TP SENSOR
3
1
ECM
Bu
12
WARNL
R/Bu
THL
R/Bl
5V
PB
W/R
K-LINE
Bu
PG3
G
TRMA
Y/Bu
5V
VCC1
Br/Y
5V
VCC2
Bu
IGP1
Y/Bl
IGP2
Y/Bl
LOAD
PG2
G
5V
BAT
VCC3
Br/W
SG1
G
5V
SG2
G
SCS
Lg
BAT
PG1
G
PGM
13
3
R/Bu R/Bu
2
W/Bl W/Bl
– GO TO STEP 2.
– • Repair open in the Yellow/Black wire
between the No.10 fuse and DLC.
• Repair open in the Black wire between
the ground cable
• If main wire harness is normal, inspect
the No.10 fuse circuit in the fuse/relay
junction box (page 10-13).
– GO TO STEP 3.
– Repair short in the main wire harness
between the ECM and the DLC.
MAP SENSOR
No.5
2 1 1 2 3
FUSE
22
(10A)
R/Bl G Br/Y W/R G
4 6
27
W/Bl Y/Bl
Bl Bl
G G
23 24 20
GND2 GND4 GND1 JOINT CONNECTOR 1
No.3
and DLC.
No.4
No.9 No.10
FUSE/RELAY
FUSE FUSE
JUNCTION BOX
(15A) (10A)
7 11
28
26
Y/Bl Y/Bl
Bu
Bl
DLC
Y/Bl
Lg
TRIM
ANGLE
16 SENSOR
Br/W Lg/Bl
Y/Bu Y/Bu
Bl Bl
Bl G G
Bl Black Br Brown
11
Y Yellow O Orange
3 8
Bu Blue Lb Light blue
G Green Lg Light green
R Red P Pink
W White Gr Gray
DLC
GND1 IGP3
(Black) (Yellow/Black)
DLC
SCS
(Light green)