Toyota Celica 2005, Repair Manual

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A19255
(+)
( − )
DI − 346
− DIAGNOSTICS ENGINE (2ZZ − GE)
2005 CELICA (RM1131U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using
the hand−held tester or the OBD II scan tool . Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine 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 Check OCV circuit.
PREPARATION:
(a) Connect the hand − held tester to the DLC3.
(b) Start the engine and warm it up.
(c) Turn the ignition switch ON and push the hand − held tester main switch ON.
(d) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1.
CHECK:
Check the engine speed when operating the OCV by the hand − held tester.
OK:
Tester Operation Specified Condition
OCV is OFF Normal engine speed
OCV is ON Rough idle or engine stall
OK Check for intermittent problems
(See page DI − 295).
NG
2 Check operation of OCV.
PREPARATION:
(a) Start the engine and warm it up.
(b) Disconnect the OCV connector.
(c) Apply battery voltage between the terminals of the OCV.
CHECK:
Check the engine speed.
OK:
Rough idle or engine stalled.
NG Replace OCV.
OK
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