Suzuki DL650 Service Manual page 190

4-30 FI SYSTEM DIAGNOSIS
Step 3
1) Connect the TP sensor coupler.
2) Insert the needle pointed probes to the lead wire coupler.
3) Turn the ignition switch ON.
Measure the TP sensor output voltage at the coupler
(between
@
PNV and
@
B/Br) by turning the throttle grip.
TP sensor output voltage
Throttle valve is closed : Approx. 1.12 V
Throttle valve is opened: Approx. 4.26 V
@
09900-25008: Multi circuit tester set
09900-25009: Needle pointed probe set
Tester knob indication: Voltage (=)
Is the voltage OK?
YES
' ' a
ECM coupler
Red, PNV or B/Br wire open or shorted to
ground, or poor
@, @
or @ I connection.
If wire and connection are OK, intermittent trou-
ble or faulty ECM.
Recheck each terminal and wire harness for
open circuit and poor connection.
NO
If check result is not satisfactory, replace TP sen-
sor with a new one.