Fuel Pump Relay/Main Relay (Aerio & Esteem)

NOTE: A/C condenser fan, fuel pump, heated oxygen sensor and main relays are identical. Following test procedures apply to all.

1. Turn ignition off. Disconnect negative battery cable. Disconnect relay connector and remove relay. See Fig 1 or Fig 2 . Using DVOM, measure resistance between relay terminals No. 1 and 2. See Fig 3 . 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.
2. 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.

Fig 1: Locating Main Relay & Fuel Pump Relay (Aerio)

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Locating Main Relay & Fuel Pump Relay (Esteem)

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Fig 3: Testing Fuel Pump & Main Relays

Courtesy of SUZUKI OF AMERICA CORP.