Test J: Step 7

7) Code 87: Checking VPWR Circuit to Fuel Pump Relay  Code 87 indicates a fuel pump primary circuit failure. Possible causes for this fault are: inertia switch not reset or electrically open, faulty fuel pump relay or ECA. Open or shorted circuit. Turn key on, leaving engine off. Leave breakout box installed and ECA connected. Locate fuel pump relay. Set DVOM on 20-volt scale. Measure voltage between chassis ground and VPWR circuit at fuel pump relay. If reading is 10.5 volts or more, go to next step. If reading is less than 10.5 volts, ensure inertia switch is on. If inertia switch will not reset, replace switch. If switch is okay, repair open in VPWR circuit between EEC power relay and fuel pump relay. Repeat QUICK TEST.