Suzuki Boulevard M50, Service Manual

Page: 196 / 454

FI SYSTEM 5-39
Step 1 (When indicating P0120-L:)
1) Remove the fuel tank. (

6-3)
2) Turn the ignition switch OFF.
3) Check the TP sensor coupler for loose or poor contacts.
If OK, then measure the TP sensor lead wire continuity.
4) Disconnect the TP sensor coupler.
5) Check the continuity between BI/B wire
A
and ground.
6) Also, check the continuity between BI/B wire
A
and B/Br wire
C
. If the sound is not heard from the tester, the circuit condi-
tion is OK.
7) Remove the right frame cover. (

8-4), ECM bracket
(

5-3
8
) and disconnect the ECM coupler.
8) Check the continuity between BI/B wire
A
and terminal
K
.
9) Also, check the continuity between Red wire
B
and terminal
6
.

TPS lead wire continuity: Continuity (

)

09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set

Tester knob indication: Continuity test (

)
Is the continuity OK?
10)After repairing the trouble, clear the DTC using SDS tool.
(

5-25)
1
1
YES Go to Step 1 (

5-38) and go to Step 2.
NO
Red wire or BI/B wire open, or BI/B wire shorted to
ground
1
]
ECM coupler (Harness side)
SA
MP
LE