Circuit Description
WARNING: This page is about a different variant/trim than selected.
EGR flow is controlled by a vacuum actuated EGR valve. The EGR vent solenoid purges to atmosphere the vacuum level at the EGR valve actuator as commanded by the PCM. This is done when the EGR flow is desired to turn off quickly.
When the PCM is commanding the EGR vent on, the voltage potential of the circuit will be low (near zero volts). When the PCM is commanding the EGR vent off, the voltage potential of the circuit will be high (near battery voltage). The primary function of the PCM is to supply the ground to the EGR vent solenoid.
DTC will set when the following conditions are present:
- PCM requested EGR vent on.
- Voltage on EGR vent control circuit is high (near battery voltage).
- Conditions are met for 2 seconds.
Or
- PCM requested EGR vent solenoid off.
- Voltage on EGR vent control circuit is low (near zero volts).
- Conditions are met for 2 seconds.