Description
The intake air temperature sensor is built-into the mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the rise in temperature.
<Reference data>
*: These data are reference values and are measured between ECM terminals 50 (Intake air temperature sensor) and 56 (Sensor ground).
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
2.PERFORM DTC CONFIRMATION PROCEDURE
Diagnosis Procedure
Regarding Wiring Diagram information
1.CHECK GROUND CONNECTION
2.CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
3.CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
4.CHECK INTAKE AIR TEMPERATURE SENSOR
5.CHECK INTERMITTENT INCIDENT
Component Inspection
1.CHECK INTAKE AIR TEMPERATURE SENSOR
Main line between A-bag and ABS circuit
Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and
loose connection (connector side
and harness side).
Harness connector M1
Harness connect ...
P0128 thermostat function
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303, P0304, P0305 or
P0306, first perform
the trouble diagnosis for DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306.
Engine coolant temperature has not risen enough to open the thermostat even ...
Automatic air conditioner system
System Diagram
CONTROL SYSTEM
The control system consists of input sensors, switches, the A/C auto amp.
(microcomputer) and outputs. The
relationship of these components is as shown in the figure below:
System Description
CONTROL OPERATION
Display
The operation status of the HVAC system ...