Suzuki 125 - “15” (P0115-H;L) Et Sensor Circuit Malfunction

RV125K7 (’07-MODEL) 57
“15” (P0115-H/L) ET SENSOR CIRCUIT MALFUNCTION
INSPECTION
Step 1 (When indicating 15:)
1) Turn the ignition switch OFF.
2) Check the ET sensor coupler 1 for loose or poor contacts.
If OK, then measure the ET sensor voltage at the coupler.
3) Disconnect the coupler and turn the ignition switch ON.
4) Measure the voltage between O wire terminal A and ground.
5) If OK, then measure the voltage between O wire terminal A
and B/Br wire terminal B.
 ET sensor voltage: 4.5 – 5.5 V
(+ O – - Ground)
(+ O – - B/Br)
 09900-25008: Multi-circuit tester set
 Tester knob indication: Voltage ()
Is the voltage OK?
DETECTED CONDITION POSSIBLE CAUSE
15 Output voltage is not within the following
range.
0.1 V Sensor voltage < 4.7 V
• ET sensor circuit open or short
• ET sensor malfunction
• ECM malfunction
P0115
H
Sensor voltage is higher than specified
value.
• ET sensor circuit open or ground circuit open
• ET sensor circuit shorted to ground
L
Sensor voltage is lower than specified
value.
ECM
E2
ET
B
B O
ET sensor
B/Br
1
YES Go to Step 2.
NO
• Loose or poor contacts on the ECM coupler
(terminal K or 4).
• Open or short circuit in the O wire or B/Br wire
1
V