Toyota Celica 2005 Repair Manual page 309

DI−110
MONITOR RESULT
Refer to page DI−3 for detailed information.
The test value and test limit information are described as shown in the following table. Check the monitor
result and test values after performing the monitor drive pattern (see page DI−3).
TID (Test Identification Data) is assigned to each emissions−related component.
S
TLT (Test Limit Type):
S
If TLT is 0, the component is malfunctioning when the test value is higher than the test limit.
If TLT is 1, the component is malfunctioning when the test value is lower than the test limit.
CID (Component Identification Data) is assigned to each test value.
S
Unit Conversion is used to calculate the test value indicated on generic OBD ll scan tools.
S
TID $08: Thermostat
TLT CID
Multiply by 0.625 and subtract
1 $01 40
(°C)
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.
1 Are there any other codes (besides DTC P0128) being output?
PREPARATION:
(a) Connect the hand−held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON and push the hand−held tester or the OBD II scan tool main switch ON.
(c) When using hand−held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC
INFO / CURRENT CODES.
CHECK:
Read the DTCs.
RESULT:
P0128 and other DTCs
HINT:
If any other codes besides P0128 is output, perform the troubleshooting for those DTCs first.
A
2005 CELICA (RM1131U)
DIAGNOSTICS
Unit Conversion
ECT sensor output when estimated ECT
has reached to malfunction criterion
Display (DTC output)
P0128
− ENGINE (1ZZ−FE)
Description of Test Data
B Go to relevant DTC chart (See page DI−42).
308
Description of Test Limit
Malfunction criteria for thermostat
Proceed to
A
B