Toyota Corolla Repair Manual: Inspection procedure
Hint
:
- if different dtcs related to different systems that have terminal e2
as the ground terminal are output
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
the engine conditions when a malfunction is detected. When troubleshooting,
it is useful for determining
whether the vehicle was running or stopped, the engine was warmed up or not,
the air–fuel ratio
was lean or rich, etc. At the time of the malfunction.
1 Read value of hand–held tester or obd ii scan tool(engine
coolant temperature)
- Connect the hand–held tester or the obd ii scan tool to the dlc3.
- turn the ignition switch on and push the hand–held tester or the
obd ii scan tool main switch on.
- select the item ”diagnosis / enhanced obd ii / data list / all /
coolant temp” and read
its value displayed on the hand–held tester or the obd ii scan tool.
Temperature: same value as the actual intake air temperature.
Result:

Hint
:
if there is an open circuit, the hand–held tester or the obd ii scan tool
indicates –40 °C (–40°f).
If there is a short circuit, the hand–held tester or the obd ii scan tool
indicates 140 °C (284°f) or more.


2 Read value of hand–held tester or obd ii scan tool(check for
open in wire harness)

- Disconnect the e2 engine coolant temperature sensor
connector.
- connect terminals 1 and 2 of the engine coolant temperature
sensor connector on the wire harness side.
- turn the ignition switch on.
- select the item ”diagnosis / enhanced obd ii /
data list / all / coolant temp” and read its value
displayed on the hand–held tester or the obd ii scan tool.
Temperature value: 140 °C (284°f) or more
- reconnect the engine coolant temperature sensor connector.



3 Read value of hand–held tester or obd ii scan tool(check for
open in ecm)

- Disconnect the e2 engine coolant temperature sensor
connector.
- connect the terminals thw and e2 of the e3 ecm connector.
Hint
:
before checking, do a visual and contact pressure check on the
ecm connector.
- turn the ignition switch on.
- select the item ”diagnosis / enhanced obd ii /
data list / all / coolant temp” and read its value
displayed on the hand–held tester or the obd ii scan tool.
Temperature value: 140 °C (284°f) or more
- reconnect the engine coolant temperature sensor connector.



Confirm good connection at ecm. If ok, replace ecm
4 Read value of hand–held tester or obd ii scan tool(check for
short in wire harness)

- Disconnect the e2 engine coolant temperature sensor
connector.
- turn the ignition switch on.
- select the item ”diagnosis / enhanced obd ii /
data list / all / coolant temp” and read its value
displayed on the hand–held tester or the obd ii scan tool.
Temperature value: –40 °C (–40°f)
- reconnect the engine coolant temperature sensor connector.


5 Read value of hand–held tester or obd ii scan tool(check for
short in ecm)

- Disconnect the e3 ecm connector.
- turn the ignition switch on.
- ) select the item ”diagnosis / enhanced obd ii /
data list / all / coolant temp” and read its value
displayed on the hand–held tester or the obd ii scan tool.
Temperature: –40 °C (–40°f)
- reconnect the ecm connector.



Replace ecm
A thermistor is built in the engine coolant temperature sensor and changes
the resistance value according
to the engine coolant temperature.
The structure of the sensor and connection to the ecm ...
Dtc p0116 engine coolant temp. Circuit
range/performance problem ...
Other materials:
Circuit description
The speed sensor detects wheel speed and transmits the appropriate
signals to the ecu. These signals are used for control
of the abs control system. Each of the front and rear rotors has
48 serrations.
When the rotors rotate, the magnetic field generated by the permanent
magnet in the spe ...
Opening the trunk from outside the vehicle
◆ Smart key system (if equipped)
While carrying the electronic key, press the button on the trunk lid.
When all the doors are unlocked with the power door lock system, the trunk can
be opened without carrying the electronic key.
◆ Wireless remote control (if equipped)
► Veh ...
Inspection procedure
Hint:
hand–held tester only:
narrowing down the trouble area is possible by performing ”a/f control” active
test (heated oxygen
sensor or other trouble areas can be distinguished).
Perform active test using hand–held tester (a/f control).
Hint:
”a/f control” is the active test which cha ...
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