Suzuki GSX-R750 Service Manual page 122

1A-50 Engine General Information and Diagnosis:
Step
1 7) Disconnect the ECM coupler. Refer to "ECM Removal
and Installation in Section 1C (Page 1C-1)".
8) Check the continuity between the P/B wire and terminal
"6". Also, check the continuity between the R wire and
terminal "7".
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity test (
ECM coupler (Harness side)
(B)
Is the continuity OK?
2 1) Connect the ECM coupler.
2) Turn the ignition switch ON.
3) Measure the input voltage between the R wire and
ground.
If OK, the measure the input voltage between the R wire
and B/Br wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
TP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R
– (–) terminal: B/Br)
Is the voltage OK?
Action
)
(A)
"6"
"7"
(Black) (Gray)
V
Go to Step 2.
?
I837H1110026-01
Go to Step 3.
(A)
I823H1110031-04
Yes
R and P/B wire open, or
P/B wire shorted to
ground.
Open or short circuit in
the R or B/Br wire.
No