Toyota Celica 2005 Repair Manual page 596

INSPECTION PROCEDURE
HINT:
If different DTCs related to different systems that have terminal E2 as the ground terminal are output
S
simultaneously, terminal E2 may be open.
Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records
S
the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can
help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air−fuel
ratio was lean or rich, as well as other data from the time when a malfunction occurred.
Hand−held tester:
1 Connect hand−held tester, and read the voltage for throttle position sensor data.
PREPARATION:
(a) Connect the hand−held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand−held tester main switch ON.
(c) Enter the following menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / THROTTLE POS
and THROTTLE POS#2.
CHECK:
Read the voltage for the accelerator pedal position sensor data.
OK:
Result:
Throttle position expressed as percentage and voltage
Accelerator pedal released
THROTTLE POS THROTTLE POS #2
(VTA1)
0 %
100 %
0 % or 100 %
about 16 %
0 to 0.2 or 4.5 to 5.5 V
(Fail safe)
6 to 20 %
A
2 Check for open and short in harness and connector in VC, VTA1, VTA2 and E2
circuits between ECM and throttle position sensor (See page IN−30).
OK
2005 CELICA (RM1131U)
DIAGNOSTICS
THROTTLE POS
(VTA2) (VTA1)
0 to 0.2 V
4.5 to 5.5 V 100 %
2.1 to 3.1 V
0 % or 100 %
(Fail safe)
about 16 %
(Fail safe)
64 to 96 %
2.15 to 3.05 V
(Does not fail safe)
− ENGINE (2ZZ−GE)
Accelerator pedal depressed
THROTTLE POS #2
(VTA2)
0 % 0 to 0.2 V
4.5 to 5.5 V
2.1 to 3.1 V
(Fail safe)
0 to 0.2 or 4.5 to 5.5 V
4.5 to 5.5 V
(Does not fail safe)
B Go to step 5.
NG Repair or replace harness or connector.
595
Trouble area
VC circuit open
E2 circuit open
VTA1 circuit open or
ground short
VTA2 circuit open or
ground short
Throttle position sen-
sor circuit is normal
DI−397
Proceed to
A
B