Suzuki GSX-R750 Service Manual page 204

4-48 FI SYSTEM DIAGNOSIS
Step 3
1) Connect the TP sensor coupler 1 to the test harness.
2) Turn the ignition switch ON.
3) Measure the TP sensor output voltage at the coupler
(between + P/B and - B/Br) by turning the throttle grip.
 TP sensor output voltage
Throttle valve is closed:
Throttle valve is opened: Approx. 4.3 V
 09900-25008: Multi-circuit tester set
 Tester knob indication: Voltage ()
Is the voltage OK?
• P/B, R or B/Br wire open or shorted to ground,
or poor 8, A or S connection
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
YES
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
If check result is not satisfactory, replace TP sen-
NO
sor with a new one.

When using the multi-circuit tester, do not storongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
4) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
Approx. 1.1 V
3
3
P/B
TPS
R
B/Br
3
ECM couplers (Harness side)
(Black)
V
ECM
(Gray)