Circuit Description

The control module enables the fuel pump relay when the ignition switch is turned ON. The control module will disable the fuel pump relay within 2 seconds unless the control module detects ignition reference pulses. The control module continues to enable the fuel pump relay as long as ignition reference pulses are detected. The control module disables the fuel pump relay within 2 seconds if ignition reference pulses cease to be detected and the ignition remains ON.

Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - 2.2L SATURN "L" SERIES article.
Turn ignition on, with engine off. Command the fuel pump relay ON and OFF with a scan tool. Repeat the commands as necessary. Does the fuel pump turn ON and OFF? If yes, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L SATURN "L" SERIES article. If no, go to next step.
Command the fuel pump relay ON and OFF with a scan tool. Do you hear the fuel pump relay click when you command the fuel pump relay ON and OFF? If yes, go to step 9 . If no, go to next step.
Turn ignition off. Remove fuel pump relay. Turn ignition on, with engine off. Probe the control circuit of the fuel pump relay with a test light connected to a good ground. Command the fuel pump relay ON and OFF with a scan tool. Does the test light turn ON and OFF? If yes, go to next step. If no, go to step 6 .
Connect a test light between the control circuit of the fuel pump relay and ground circuit of the fuel pump relay. Command the fuel pump relay ON and OFF with a scan tool. Does the test light turn ON and OFF? If yes, go to step 21 . If no, go to step 24 .
Does the test light remain illuminated with each command? If yes, go to next step. If no, go to step 8 .
Test the control circuit of the fuel pump relay for a short to voltage. Did you find and correct the condition? If yes, go to step 29 . If no, go to step 28 .
Test the control circuit of the fuel pump relay for a short to ground or an open. Did you find and correct the condition? If yes, go to step 29 . If no, go to step 22 .
Turn ignition on, with engine off. Does the fuel pump operate continuously? If yes, go to next step. If no, go to step 11 .
Turn OFF the ignition. Remove fuel pump relay. Turn ignition on, with engine off. Does the fuel pump operate continuously? If yes, go to step 23 . If no, go to step 27 .
Inspect fuel pump fuse. Is fuel pump fuse open? If yes, go to next step. If no, go to step 15 .
Disconnect the fuel sender harness from the body pass-through connector. Test the supply voltage circuit of the fuel pump for a short to ground between the fuel pump relay and the body pass-through connector. Replace fuel pump fuse, if necessary. Did you find and correct the condition? If yes, go to step 29 . If no, go to next step.
Lower fuel tank. Inspect fuel sender harness on top of the fuel tank for any damage to the harness, or a short to ground in the supply voltage circuit of the fuel pump. Replace fuel pump fuse, if necessary. Did you find and correct the condition? If yes, go to step 29 . If no, go to next step.
Connect all disconnected electrical components. Install a new fuel pump fuse. Command the fuel pump relay ON with a scan tool. Inspect the fuel pump fuse. Is the fuel pump fuse open? If yes, go to step 26 . If no, problem is intermittent.
Turn OFF the ignition. Remove fuel pump relay. Turn ignition on, with engine off. Probe the battery voltage circuit of the fuel pump relay, switch side, with a test light connected to a good ground. Does the test light illuminate? If yes, go to next step. If no, go to step 25 .
Connect a 15-amp fused jumper wire between the battery voltage circuit of the fuel pump relay and supply voltage circuit of the fuel pump. Does the fuel pump operate? If yes, go to step 21 . If no, go to next step.
Disconnect the fuel sender harness from the body pass-through connector. Test the supply voltage circuit of the fuel pump for an open or high resistance between the fuel pump relay and body pass-through connector. Did you find and correct the condition? If yes, go to step 29 . If no, go to next step.

NOTE: Inspect ground circuit for proper torque, corrosion on terminals, or damage to wiring harness.

Test the ground circuit of the fuel pump for an open or high resistance between the body pass-through connector and ground. Did you find and correct the condition? If yes, go to step 29 . If no, go to next step.
Test for an intermittent and for a poor connection at the fuel sender harness to the body pass-through connector. Did you find and correct the condition? If yes, go to step 29 . If no, go to next step.
Lower fuel tank. Inspect fuel sender harness on top of fuel tank for a damaged harness, or open circuit. Did you find and correct the condition? If yes, go to step 29 . If no, go to step 26 .
Test for an intermittent and for a poor connection at the fuel pump relay. Did you find and correct the condition? If yes, go to step 29 . If no, go to step 27 .
Test for an intermittent and for a poor connection at the PCM. Did you find and correct the condition? If yes, go to step 29 . If no, go to step 28 .
Repair short to voltage in the supply voltage circuit of the fuel pump. After repairs, go to step 29 .
Repair open or high resistance in the ground circuit of the fuel pump relay. After repairs, go to step 29 .
Repair open in the battery voltage circuit of the fuel pump relay. After repairs, go to step 29 .

NOTE: Inspect for poor connections at the fuel pump, within the fuel tank, before replacing the fuel pump.

Replace fuel sender. Replace fuel pump fuse, if necessary. After replacement, go to step 29 .
Replace fuel pump relay. After replacement, go to step 29 .
Replace PCM. See appropriate REMOVAL & INSTALLATION article. Perform PCM relearn procedure. See PCM REPROGRAMMING under PROGRAMMING. After repair, go to next step.
Operate the system in order to verify the repair. Did you correct the condition? If yes, system is okay. If no, go to step 2 .