1. Remove the fuel pump stop switch. (See FUEL PUMP STOP SWITCH REMOVAL/INSTALLATION [L3].)
2. Verify that release switch of the fuel pump stop switch is pushed.
3. Lightly vibrate the fuel pump stop switch and verify that the release switch does not pop out.
4. Shake the fuel pump stop switch hard and verify that the release switch pops out.
1. Disconnect the negative battery cable.
2. Disconnect the fuel pump stop switch connector.
3. Inspect the resistance between the fuel pump stop switch side terminals 1-2.