LEMON Manuals: Even more car manuals for everyone
Home >> Saturn >> 2000 >> LS1 Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0203: Injector No. 3 Control Circuit >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2000 Saturn LW2 and 2000 Saturn LS2. However, it is still accessible from the selected car via links, so may be relevant.

ECM enables an injector on intake stroke of each cylinder by grounding control circuit through an internal switch. When ECM is commanding an injector on, voltage of control circuit should be about zero volts. When injector is not active, voltage on control circuit should be about battery voltage. If ECM does not get response from injector, this DTC will set. ECM will continue to test the circuit and if fault goes away, injector driver will be reactivated.

DTC will set when injector circuit is open and battery voltage is between 7.5-15.0 volts and engine speed is greater than 40 RPM.

scientia non olet · About LEMON Manuals