Throttle Position (Tp) Sensor Inspection - Mazda RX-8 Manual

THROTTLE POSITION SENSOR

THROTTLE POSITION (TP) SENSOR INSPECTION

CAUTION:
This inspection procedure cannot be completed correctly if the accelerator pedal position sensor has a
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malfunction. Before performing this procedure, verify that any one of the DTCs (P1577, P2122, P2123,
P2127, P2128, P2138) related to the accelerator pedal position sensor is not detected.
NOTE:
Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See
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FOREWORD .)
Voltage Inspection
1. Turn the ignition switch to the ON position.
2. Verify that the voltage at PCM terminals 1J (WDS PID: TP1) and 1M (WDS PID: TP2) increases while
gradually increasing the accelerator pedal opening angle according to the accelerator pedal opening
angle.
If it can be verified, go to the next step.
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If it cannot be verified even though the related wiring harnesses have no malfunction, replace the
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throttle body. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
3. Verify that the voltage at PCM terminals 1J (WDS PID: TP1) and 1M (WDS PID: TP2) is as indicated
in the table.
If it cannot be verified, replace the throttle body. (See INTAKE-AIR SYSTEM
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REMOVAL/INSTALLATION .)
TP sensor output voltage
Measurement condition
When the accelerator pedal is depressed. 3.8254.095 V 4.0334.303 V
When the accelerator pedal is released.
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
PCM terminal (WDS PID)
1J (TP1) 1M (TP2)
0.40.8 V 1.181.78 V
(w) Engine Specifications
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