DTC 26 - TRAC Sub-Throttle Valve: DTC Detecting Condition

With sub-throttle valve commanded to full open position, input voltage at VTA2 circuit on ECM is not 3-4.5 volts. Possible causes are:

• Sub-throttle actuator.
• Throttle body (faulty valve).
• Sub-throttle position sensor.
• Sub-throttle position sensor open or short circuit.
• Engine Control Module (ECM).
• TRAC ECU.