Suzuki VL800 Service Manual page 426

14-74 VL800K5 ('05-MODEL)
Step 1 (When indicating P1654-L:)
1) Remove the fuel tank. ($14-93)
2) Turn the ignition switch OFF.
3) Check the STP sensor coupler for loose or poor contacts.
If OK, then check the STP sensor lead wire continuity.
4) Disconnect the STP sensor coupler.
5) Check the continuity between Y/W wire A and ground.
6) Also, check the continuity between Y/W wire A and B/Br wire
B. If sound is not heard from the tester, the circuit condition
is OK.
7) Disconnect the ECM coupler.
8) Check the continuity between Red wire C and terminal 6.
9) Also, check the continuity between Y/W wire A and term nal
4. If sound of the continuity is not heard from the tester the
circuit condition is OK.
" 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
) Tester knob indication: Continuity test (()
Is the continuity OK?
YES Go to Step 1 ($14-72) and Go to Step 2.
Red or Y/W wire open, or Y/W wire shorted to
NO
ground.
10) After repairing the trouble, c ear the DTC using SDS tool.
($14-39)
1
1
1
1
Terminal side