Toyota Celica 2005 Repair Manual page 592

DTC No.
Condition (a) of DTC P0120, P0122, P0123, P0220, P0222 or P0223 continues
for 10 sec. with idling, but for 2 sec. without idling
(Open or short in throttle position sensor circuit)
P0122 (a) VTA1 x 0.2 V
P0123 (a) VTA1 y 4.8 V
Detection conditions for DTCs P0122 and P0123 are not satis-
P0120 fied but condition (a) is satisfied
(a) VTA1 x 0.2 V or VTA1 y 4.8 V
P0222 (a) VTA2 x 0.5 V
P0223 (a) VTA2 y 4.8 V and 0.2 x VTA1 x 1.8 V
Detection conditions for DTCs P0222 and P0223 are not satis-
P0220 fied but condition (a) is satisfied
(a) VTA2 x 0.5 V or VTA2 y 4.8 V and 0.2 x VTA1 x 1.8 V
Condition (a) continues for 0.5 sec. or more, or
condition (b) continues for 0.4 sec. or more:
P2135
(a) |VTA1 − VTA2| x 0.02 V
(b) VTA1 x 0.2 V and VTA2 x 0.5 V
HINT:
After confirming DTCs, use the hand−held tester or the OBD II scan tool to confirm the throttle valve
S
opening percentage and closed throttle position switch condition.
The THROTTLE POS means the VTA1 signal and the THROTTLE POS #2 means the VTA2 signal.
S
Reference (Normal condition):
Tester display
THROTTLE POS
THROTTLE POS #2
2005 CELICA (RM1131U)
DIAGNOSTICS
DTC Detection Condition
Accelerator pedal released
6 to 20 %
2.15 to 3.05 V
− ENGINE (2ZZ−GE)
S Throttle position sensor
S VTA1 circuit short
S VC circuit open
S ECM
S Throttle position sensor
S VTA1 circuit open
S E2 circuit open
S VC and VTA1 circuits are short−circuited
S ECM
S Throttle position sensor
S ECM
S Throttle position sensor
S VTA2 circuit short
S VC circuit open
S ECM
S Throttle position sensor
S VTA2 circuit open
S E2 circuit open
S VC and VTA2 circuits are short−circuited
S ECM
S Throttle position sensor
S ECM
S VTA1 and VTA2 circuits are short−circuited
S Throttle position sensor
S ECM
591
Main trouble
Accelerator pedal fully depressed
64 to 96 %
4.5 to 5.5 V
DI−393