Description
The automatic transmission fluid (atf) temperature sensor converts the atf temperature into a resistance value which is input into the ecm.
The ecm applies a voltage to the temperature sensor through ecm terminal tho1.
The sensor resistance changes with the atf temperature.
One terminal of the sensor is grounded so that the sensor resistance and voltage decrease as the temperature becomes higher.
The ecm calculates the atf based on the voltage signal.
Monitor description
Atf temperature sensor converts atf temperature to an electrical resistance value. Based on the resistance, the ecm determines the atf temperature, and the ecm detects an open or short in the atf temperature circuit. If the resistance value of the atf temperature is less than 79 ù*1 or more than 156 kù*2, the ecm interprets this as a fault in the atf sensor or wiring. The ecm will illuminate the mil and store the dtc.
Hint:
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Component operating range
Wiring diagram
Inspection procedure
Hint:
Using the intelligent tester's data list allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the data list early in troubleshooting is one way to save time.
Notice:
In the table below, the values listed under "normal condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
Hint:
Measure the resistance between terminal tho1 (tho) and the body ground.
Hint:
If a circuit related to the atf temperature sensor becomes open, p0713 is set in approximately 0.5 Seconds. It is not necessary to inspect the circuit when p0711 is set
Standard resistance
Hint:
If the resistance is out of the specified range of either of the atf temperatures shown in the table below, the driveability of the vehicle may decrease.
Standard resistance
Standard resistance
Replace ecm
How to proceed with troubleshooting
Hint:
Use the following procedures to troubleshoot the occupant
classification system.
*: Use the intelligent tester.
Vehicle brought to workshop
Passenger airbag on/off indicator check
Dtc check (present and past dtc)*
Check for dtcs (see page rs-249 ).
Result ...
Low battery positive voltage
Description
When there is an abnormality in the power supply circuit of the brake
actuator (skid control ecu), the skid
control ecu sets a dtc and the operation is prohibited by the fail-safe
function. This dtc is set when the
voltage supplied to terminal ig1 is outside the dtc detection ...
Terminals of ecu
Check combination meter assembly
Disconnect the e19 meter connector.
Measure the voltage and resistance of the wire
harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
Check heater control panel (for automat ...