Fuel Cut-Off Relay
The fuel cut-off relay is a solid state relay with no given resistance or testing values. Prior to replacing relay, use the following procedures to eliminate possible problems related to the cut-off relay wiring harness and input signals.
- With ignition switch off, remove dash undercover from driver's side and pull down fuse box/relay panel. Remove fuel cut-off relay. Using relay socket cavity terminals, check for continuity between the No. 3 terminal and ground. Continuity should exist. If not, check for an open in Black wire between relay and ground. See Fig 1 and Fig 2 .
- Attach positive probe of a voltmeter to the No. 2 terminal and negative probe to the No. 3 terminal. Turn ignition switch to the "ON" position. Battery voltage should be present. If not, check Black/Yellow wire from ignition switch to fuel cut-off relay as well as the No. 1 fuse. Repair or replace as necessary.
- Turn ignition off. Attach positive probe of voltmeter to the No. 4 terminal and negative probe to the No. 3 terminal. Turn ignition switch to the "ON" position. Battery voltage should be present. If not, check Blue wire between ignition coil and fuel cut-off relay.
- Turn ignition off. Connect a jumper wire between the No. 1 and No. 2 terminals. Turn ignition switch to the "ON" position. The fuel pump should run. If not, check the Yellow wire between fuel pump and fuel cut-off relay, and check Black wire from fuel pump to ground. If all wires and voltage signals are okay, replace fuel cut-off relay.