DTC P0122: Throttle Position Circuit Low Input <3.0L Engine>

CIRCUIT OPERATION
• A 5-volt power supply is applied on the TPS power terminal (terminal 4) from the PCM (terminal 46). The ground terminal (terminal 1) is grounded with PCM (terminal 57).
• When the throttle valve shaft is turned from the idle position to the fully opened position, the resistor between the TPS output terminal (terminal 3) and ground terminal will increase according to the rotation.
TECHNICAL DESCRIPTION
• The TPS outputs voltage which corresponds to the throttle valve opening angle.
• The PCM checks whether the voltage is within a specified range.
DTC SET CONDITIONS

Check Conditions
Two seconds or more have passed since the staring sequence was completed.
Engine speed is higher than 2,000 r/min.
Volumetric efficiency is higher than 60 percent.

Judgement Criteria
• TPS output voltage has continued to be 0.8 volt or lower for 2 seconds.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
• TPS failed or maladjusted.
• Open or shorted TPS circuit, or loose connector.
• PCM failed.