Suzuki Burgman UH125 Service Manual page 163

4-48 FI SYSTEM DIAGNOSIS
Step 1 (When indicating P1651-H:)
1) Turn the ignition switch OFF.
2) Remove the front leg shield. (#8-6)
3) Check the TO sensor coupler 1 for loose or poor contacts.
If OK, then check the TO sensor lead wire continuity.
4) Disconnect the TO sensor coupler.
5) Check the continuity between O/Bl wire A and Lg wire B.
If the sound is not heard from the tester, the circuit condition is
OK.
6) Disconnect the ECM coupler.
7) Check the continuity between Lg wire B and terminal 3.
8) Also, check the continuity between B wire C and terminal J.
$ TOS lead wire continuity: Continuity (()
! 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
) Tester knob indication: Continuity test (()
"
When using the multi-circuit tester, do not strongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
Is the continuity OK?
YES Go to Step 2.
NO Lg wire shorted to VCC, or B wire open.
9) After repairing the trouble, clear the DTC using SDS tool.
(#4-26)
1
1
1
ECM coupler (Harness side)