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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: Approx. 1.1 V
Throttle valve is opened: Approx. 4.3 V
09900-25008: Multi-circuit tester set
Tester knob indication: Voltage ()
Is the voltage OK?
4) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
3
V
ECM
TPS
P/B
R
B/Br
3
YES
• 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.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
NO
If check result is not satisfactory, replace TP sen-
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.
3
(Black) (Gray)
ECM couplers (Harness side)