Diagnostic Aids

Check for any of the following conditions:

• Check resistance of fuel pump relay. Resistance across terminals No. 3 and 5 is 79-95 ohms at 68°F (20°C). Resistance across terminals No. 1 and 2 is infinite.
• Fuel pump relay electrical contacts may be pitted or sticking. Replace fuel pump relay if tapping gently on relay, or wiggling relay causes a change in relay operation.
• Performance of fuel pump relay may be affected by temperature. Check fuel pump relay after vehicle has sat outside overnight and after running engine for 30 minutes.
• An intermittent malfunction may be caused by a fault in fuel pump electrical circuit. Inspect wiring harness and components for an intermittent condition. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.0L & 2.5L TRACKER article.