J2 - Check Fuel Pump Relay
Fuel Pump Relay:
- Key "OFF".
- Fuel pump relay disconnected.
- Digital Volt/Ohm Meter (DVOM) on 200 ohm scale.
- Check fuel pump relay coil resistance:
- For ISO type relays, measure resistance between Pins 85 and 86 at the fuel pump relay (pin numbers molded on relay).
- For other types of relays, measure resistance between VPWR pin and fuel pump circuit pin at the fuel pump relay.
- Resistance should be between 40 and 85 ohms.
- DVOM on 10,000 ohm scale.
- Check fuel pump relay for internal shorts.
- For ISO type relays, measure resistance between Pin 85 and both Pins 30 and 87 at the fuel pump relay.
- For other types of relays, measure resistance between the fuel pump circuit pin and both the power-to-pump and B(+) pins at the fuel pump relay.
- Both resistances should be greater than 10,000 ohms.
- Are all resistance checks OK?
Yes -- Go to J3. J3 - Check Fuel Pump Circuit For Short to Power
No -- Replace fuel pump relay. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)