Toyota Tacoma manuals

Toyota Corolla Repair Manual: Circuit description

Refer to dtc p0115

Dtc no.

Dtc detection condition

Trouble area

P0116 If engine coolant temperature (ect) was between 35 c (95 F) and 60 c (140 F) when starting the engine, and also conditions (a) and (b) are met:
  1.  vehicle has run with acceleration and deceleration
  2.  etc still remains within 3 c (5.4 F) of the starting temperature (2 trip detection logic)
  • Engine coolant temperature sensor
If engine coolant temperature (ect) was more than 60 c when starting the engine, and also conditions (a) and (b) are met:
  1.  vehicle has run with acceleration and deceleration
  2.  ect still remains within 1 c (1.8 F) of the starting temperature (6 trip detection logic)

Monitor description

The engine coolant temperature (ect) sensor is used to monitor the engine coolant temperature. The ect sensor has a thermistor that varies its resistance depending on the temperature of the engine coolant. When the coolant temperature is low, the resistance in the thermistor increases. When the temperature is high, the resistance drops. The variations in resistance are reflected in the voltage output from the sensor. The ecm monitors the sensor voltage and uses this value to calculate the engine coolant temperature. When the sensor output voltage deviates from the normal operating range, the ecm interprets this as a fault in the ect sensor and sets a dtc.

Examples:

  1.  upon starting the engine, the coolant temperature (ect) was between 35 c (95 F) and 60 c (140 F).

    If after driving for 250 seconds, the ect still remains within 3 c (5.4 F) of the staring temperature, a dtc will be set. (2 Trip detection logic)

  2.  upon starting the engine, the coolant temperature (ect) was over 60 c (140 F). If after driving for 250 seconds, the ect still remains within 1 c (1.8 F) of the starting temperature, a dtc will be set. (6 Trip detection logic)

Monitor strategy

Typical enabling conditions

Typical enabling conditions

Typical malfunction thresholds

Typical malfunction thresholds

Component operating range

Component operating range

Wiring diagram

Wiring diagram

Refer to dtc p0115

Engine coolant temp. Circuit range/performance problem
Dtc p0116 engine coolant temp. Circuit range/performance problem ...

Inspection procedure
Hint: if dtcs p0115, p0116, p0117, p0118 and p0125 are output simultaneously, the engine coolant temperature sensor circuit may be open or short. Perform the troubleshooting of dtc p0115, ...

Other materials:

Onvehicle inspection
1. Check fuel pump operation Connect the handheld tester to the dlc3.  turn the ignition switch on and handheld tester main switch on. Notice: do not start the engine.  select the active test mode on the handheld tester.  please refer to the handheld tester ope ...

Ecm (1zzfe)
Replacement 1. Disconnect battery negative terminal 2. Remove glove compartment door assy 3. Remove ecm Remove the 2 clips using a clip remover. Then, open the cover. Disconnect the 4 ecm connectors.  remove the wire harness from the wire harness clamp. Remove the 2 ...

Bluetooth device registration status
1 Display the Bluetooth* Setup screen. *: Bluetooth is a registered trademark of Bluetooth SIG, Inc. 2 Select the device. 3 Select Device Info. 4 Following screen is displayed: 1 Device Name 2 Change connection method 3 Bluetooth Address 4 Display your telephone number The number may ...

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