Fuel System

Perform On-Board Diagnostic (OBD) System Check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . After performing OBD system check, go to next step.
Check fuel pump fuse. If fuse is okay, go to next step. If fuse is open, go to step 9).
Remove fuel pump relay. Using a test light connected to ground, probe fuel pump relay battery feed circuit. See the WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step 12).
Using a test light connected to battery voltage, probe fuel pump relay connector ground circuit. See the WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step 13).
Using a test light connected to ground, probe fuel pump relay connector control circuit. See the WIRING DIAGRAMS article. Using scan tool, command fuel pump on. If test light illuminates, go to next step. If test light does not illuminate, go to step 11).
Using a fused jumper wire, jumper fuel pump connector battery feed circuit to fuel pump circuit. See the WIRING DIAGRAMS article. Fuel pump should operate. If fuel pump operates, go to step 18). If fuel pump does not operate, go to next step.
Leave jumper wire connected. Disconnect fuel pump connector. Using a test light connected to ground, probe fuel pump connector power feed circuit. See the WIRING DIAGRAMS article. If test light illuminates, go to next step. If test light does not illuminate, go to step 14).
Leave jumper wire connected. Connect test light between fuel pump connector power feed circuit and ground circuit. If test light illuminates, go to step 20). If test light does not illuminate, go to step 15).
Turn ignition off. Remove fuel pump fuse. Disconnect fuel pump connector. Using a test light connected to battery voltage, probe fuel pump connector power feed circuit. If test light illuminates, go to step 16). If test light does not illuminate, go to next step.
Reconnect fuel pump connector. Install NEW fuel pump fuse. Turn ignition on. Recheck fuel pump fuse. If fuse blows, go to step 20). If fuse is okay, check for intermittent short in fuel pump power feed circuit or an intermittent internal fuel pump problem.
Turn ignition off. Disconnect PCM connector C1. Using DVOM, check resistance of fuel pump relay control circuit between fuel pump relay connector and PCM connector. Resistance should be 5 ohms or less. If resistance is as specified, go to step 22). If resistance is not as specified, go to step 17).
Repair open in fuel pump relay battery feed circuit. After repairs, go to step 24).
Repair open in fuel pump relay ground circuit. After repairs, go to step 24).
Repair open in fuel pump feed circuit. After repairs, go to step 24).
Repair open in fuel pump ground circuit. After repairs, go to step 24).
Repair short to ground in fuel pump feed circuit. After repairs, go to step 24).
Repair fuel pump relay control circuit. After repairs, go to step 24).
Check for poor fuel pump relay connections. After repairs, go to step 24). If connections are okay, go to next step.
Replace fuel pump relay. After repairs, go to step 24).
Check fuel pump harness for damage. After repairs, go to step 24). If harness is okay, go to next step.
Replace fuel pump. After repairs, go to step 24).
Check for poor PCM connections. Repair as necessary. After repairs, go to step 24). If connections are okay, go to next step.
Replace PCM. Perform PCM relearn procedures. After repairs, go to next step.
Using scan tool, clear DTC(s). Attempt to start engine. If engine starts and continues to run, go to next step. If engine does not start, or starts and dies, go to step 2).
Warm engine to normal operating temperature. Using scan tool, select DTC, FAILED THIS IGN function. If any DTC(s) is present, diagnose DTC(s). See the TESTS W/CODES article. If DTC(s) is not present, go to next step.
Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any DTC(s) is present, diagnose DTC(s). See the TESTS W/CODES article. If DTC(s) are not present, system is okay.