Fuel Pump Relay & Auto Shut Down Relay: Descriptions

The terminals on the bottom of each relay are numbered. Two different types of relays may be used.

• Terminal No. 30 is connected to battery voltage. For both the ASD and fuel pump relays, terminal 30 is connected to battery voltage at all times.
• The PCM grounds the coil side of the relay through terminal number 85.
• Terminal No. 86 supplies voltage to the coil side of the relay.
• When the PCM de-energizes the ASD and fuel pump relays, terminal No. 87A connects to terminal No. 30. This is the Off position. In the off position, voltage is not supplied to the rest of the circuit. Terminal No. 87A is the center terminal on the relay.
• When the PCM energizes the ASD and fuel pump relays, terminal No. 87 connects to terminal No. 30. This is the On position. Terminal No. 87 supplies voltage to the rest of the circuit.