Suzuki 2006 GSR600, Руководство по обслуживанию

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FI SYSTEM DIAGNOSIS 4-67
“C29” (P1654-H/L) STP SENSOR CIRCUIT MALFUNCTION
INSPECTION
Step 1 (When indicating C29:)
1) Turn the ignition switch to OFF.
2) Lift and support the fuel tank. (

5-3)
3) Remove the air cleaner box and lift up the throttle body.
(

5-13)
4) Check the STP sensor coupler for loose or poor contacts.
If OK, then measure the STP sensor input voltage.
5) Disconnect the STP sensor coupler.
6) Turn the ignition switch ON.
7) Measure the voltage at the R wire
A
and ground.
8) Also, measure the voltage at the R wire
A
and B/Br wire
C
.
DETECTED CONDITION POSSIBLE CAUSE
C29 Signal voltage is not within the following
range.
Difference between actual throttle open-
ing and opening calculated by ECM is
larger than specified value.
0.15 V
Sensor voltage < 4.85 V
• STP sensor maladjusted
• STP sensor circuit open or short
• STP sensor malfunction
• ECM malfunction
P1654
H
Sensor voltage is higher than specified
value. • STP sensor circuit shorted to VCC or ground cir-
cuit open
• STP sensor circuit open or shorted to ground or
VCC circuit open
L
Sensor voltage is lower than specified
value.
ECM
E2
VCC
STP
STP sensor
Y/W
R
B/Br
1