C22" (P1450-H/L) Ap Sensor Circuit Malfunction - Suzuki GSX-R1000 2007 Service Manual

"C22" (P1450-H/L) AP SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
C22 AP sensor voltage is not within the fol-
lowing range.
0.5 V Sensor voltage < 4.85 V
NOTE:
Note that atmospheric pressure varies
depending on weather conditions as
well as altitude.
Take that into consideration when
inspecting voltage.
P1450 Sensor voltage is higher than specified
H
value.
Sensor voltage is lower than specified
L
value.
AP sensor
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle pointed tester probe to prevent the terminal damage or terminal bend.
INSPECTION
Step 1 (When indicating C22:)
1) Turn the ignition switch OFF.
2) Remove the front seat. ( 8-8)
3) Check the AP sensor coupler
If OK, then measure the AP sensor input voltage.
• Clogged air passage with dust
• AP sensor circuit open or shorted to ground
• AP sensor malfunction
• ECM malfunction
• AP sensor circuit shorted to VCC or ground circuit
open
• AP sensor circuit open or shorted to ground or
VCC circuit open
R
B/Br
G/Y
for loose or poor contacts.
FI SYSTEM DIAGNOSIS 4-57
POSSIBLE CAUSE
ECM
VCC
E2
AP
1