Circuit Description

Turbocharger wastegate is a vacuum actuated valve used to control exhaust gas heat sent to turbo. Wastegate pulse width modulated solenoid meters vacuum level at wastegate valve actuator as commanded by PCM. When PCM commands wastegate solenoid on, voltage potential of circuit is low (near zero volts). When PCM commands wastegate solenoid off, voltage potential of circuit is high (near battery voltage). The primary function of PCM is to supply ground to wastegate solenoid.

DTC will set when the following conditions are present:

PCM requested wastegate solenoid on.
Voltage on wastegate solenoid control circuit is high (near battery voltage).
Two consecutive faults detected.
Conditions are met for 2 seconds.

PCM requested wastegate solenoid off.
Voltage on wastegate solenoid control circuit is low (near zero volts).
Two consecutive faults detected.
Conditions are met for 2 seconds.