Fuel Pump Relay & Main Relay (Aerio)
NOTE:
A/C condenser fan, fuel pump, heated oxygen sensor and main relays are identical. Following test procedures apply to both.
- Turn ignition off. Disconnect negative battery cable. Disconnect relay connector and remove relay. See Fig 1 . Using DVOM, measure resistance between relay terminals No. 1 and 2. See Fig 2 . Resistance should be infinity. Measure resistance between relay terminals No. 3 and 4. Resistance should be 70-110 ohms. If resistance is not as specified, replace relay.
- Energize relay by applying battery voltage and ground to terminals No. 3 and 4. Check continuity between terminals No. 1 and 2. If continuity is present, relay is okay. If continuity is not present, replace relay.