Pcm Temperature Sensor Function [13B-Msp]; Pcm Temperature Sensor Construction/Operation; Knock Sensor (Ks) - Mazda RX-8 2009 Service Highlights

When the temperature of the zirconium element is
low, electromotive force is not generated.
Therefore the HO2S is heated by a built-in heater,
facilitating the oxygen sensor activation. Due to
this, the sensor is efficiently activated even
immediately after cold-engine startup, and a
stable sensor output can be obtained.
End Of Sie
NG: PCM

PCM TEMPERATURE SENSOR FUNCTION [13B-MSP]

Detects the temperature of the PCM.
End Of Sie
PCM TEMPERATURE SENSOR CONSTRUCTION/OPERATION [13B-MSP]
The PCM temperature sensor is integrated with PCM.
A thermistor-type sensor (negative pressure thermistor) has been adopted.
Voltage is output based on the resistance value which changes according to the temperature of the PCM.
PCM temperature sensor characteristic
End Of Sie
NG: KNOCK SENSOR
KNOCK SENSOR (KS) CONSTRUCTION/OPERATION [13B-MSP]
KS No.1 is installed on the front rotor housing.
KS No.2 is installed on the rear rotor housing.
Converts knocking vibration into a voltage value
using the piezoelectric effect of the semi-
conductor, and sends the value to the PCM.
The piezoelectric effect is a phenomenon in which
a difference in electric potential is produced on
the surface of a piezoelectric element by the
application of tensile load or pressure from a
certain direction. Tensile load and pressure
applied to the KS originates from cylinder block
vibration caused by abnormal combustion in the
engine. The difference in electric potential, which
results from the strain by the vibration, is sent to
the PCM as a knocking signal.
End Of Sie
NG: BAROMETRIC PRESSURE SENSOR
CONTROL SYSTEM [13B-MSP]
HIGH
OUTPUT
VOLTAGE
LOW
14.7
AIR/FUEL
RICH
RATIO
PCM TEMPERATURE
LOW
KS NO.1
01-40
LEAN
ar8uun00000212
id0140g1182000
id0140g1181900
HIGH
ar8uun00000253
id0140g1174200
KS NO.2
ar8uun00000254
01-40–27