Intake Air Temperature Sensor; Octane Adjust Shorting Bar - Mazda B-Series 1997 Workshop Manual

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CONTROL SYSTEM (FOR 2 . 3 ~ / 3 . o ~ I 4 . 0 ~ )
FT
INTAKE AIR TEMPERATURE SENSOR
If the intake air temperature sensor or circuit has an open or short, Diagnostic Trouble Code No.
PO1 12, PO1
13
or P I 11
2
is output.
If the intake air temperature sensor circuit fails, no particular driveability symptom will be noticed.
Removal 1 Installation
1. Disconnect the intake air temperature sensor connector.
2. Remove the intake air temperature sensor.
3. Install in the reverse order of removal.
6BUOFT-254
INTAKE AIR
TEMPERATURE
SENSOR
lnspection
1. Disconnect the intake air temperature sensor connector.
2. Check for damaged or pushed out pin(s), corrosion, and
loose wires.
3.
Reconnect the sensor connector.
4. Connect the SST (NGS) to the data link connector.
Turn the ignition switch ON.
5. Access IAT PID and record value.
Specification:
Voltage values were calculated for VREF
=
5.0 volts.
~ h e s e values may vary 15 percent due to sensor and
VREF variations.
I
Temperature
I
PID Voltages (V)
Resistance (K)
I
6. If IAT PID is out of specification, place the sensor in water
with a thermometer and heat the water gradually.
7.
Measure the resistance of the sensor.
OCTANE ADJUST SHORTING BAR
(FOR 2.3L 13.OL 14.OL)
If the octane adjust shorting bar or circuit has an open,
Diagnostic Trouble Code No. PI390 is output.
lnspection
Refer to Pinpoint test for PI390 (page FT-133).
6BUOFT-257

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