Circuit DescriptionThe ether injection circuit is a device used by the engine to control the ether injection operation. The ether injection circuit utilizes a pulse width modulated (PWM) signal. A PWM signal is a pulsed voltage signal between 0-VDC and system voltage. The frequency of the pulsed voltage signal is dependent on the application requirement.

Component LocationThe ether injection solenoid location varies by OEM. Refer to the OEM service manual to determine the location.

Conditions for Running the DiagnosticsThis diagnostic runs when the keyswitch is in the ON position and when the PWM device is activated. In some cases the diagnostic can also run at some fixed intervals.

Conditions for Setting the Fault CodesThe ether injection circuit PWM signal is detected to be greater than 0-VDC when the PWM signal is turned off by the ECM.

Action Taken When the Fault Code is ActiveThe ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.The ether injection operation will be disabled.Conditions for Clearing the Fault CodeTo validate the repair, perform a key cycle, and leave the key in the ON position for 1 minute.The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.The ECM will turn off the amber CHECK ENGINE lamp after the diagnostic runs and passes.The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults.

Shop TalkPossible causes of this fault include:

An open circuit in the engine harness or ether injection solenoidA short circuit to voltage source in the OEM harnessA malfunctioning ECM.

Possible Cause:1) Ether Injection Solenoid failure2) OEM harness3) ECM failure