Description
Refer to dtc p0115 (see page es-105).
Monitor description
The resistance of the ect sensor varies in proportion to the actual ect. The ect supplies a constant voltage to the sensor and monitors the signal output voltage of the sensor. The signal voltage output varies according to the changing resistance of the sensor. After the engine is started, the ect is monitored through this signal. If the ect sensor indicates that the engine is not yet warm enough for closed-loop fuel control, despite a specified period of time having elapsed since the engine was started, the ecm interprets this as a malfunction in the sensor or cooling system and sets the dtc.
Example: the ect is 0°c (32°f) at engine start. After about 1 minute running time, the ect sensor still indicates that the engine is not warm enough to begin closed-loop fuel (air-fuel ratio feedback) control. The ecm interprets this as a malfunction in the sensor or cooling system and sets the dtc.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Wiring diagram
Refer to dtc p0115 (see page es-106).
Inspection procedure
Hint:
Hint:
If any dtcs other than p0125 are output, troubleshoot those dtcs first.
Standard value: 80 to 84°c (176 to 183°f)
Hint:
In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.
Terminals of ecu (2005/11-2006/01)
Check air conditioning amplifier
Measure the voltage and resistance of the
connectors.
Hint:
Check from the rear of the connector while it is
connected to the air conditioning amplifier.
using an oscilloscope, check waveform 1.
Can communication signal
Hint:
...
Evaporative emission control system pressure sensor
Dtc summary
Hint:
The canister pressure sensor is built into the canister pump module.
Description
The description can be found in the evap (evaporative emission) system (see
page es-335).
Monitor description
Dtc p0450: canister pressure sensor abnormal fluctuation
If t ...
Front occupant classification sensor lh circuit
malfunction
Description
The front occupant classification sensor lh circuit consists of the occupant
classification ecu and the
front occupant classification sensor lh.
Dtc b1780 is recorded when a malfunction is detected in the front occupant
classification sensor lh
circuit.
Wiring diagram
...