Spectrum L4-91.5 1.5L (1989)
Chart C-2 Wiring Diagram
DESCRIPTION:
The fuel cut-off relay is supplied battery voltage by fuse #13, and grounded by an ECM driver when in deceleration mode. The ECM senses a
deceleration condition from the TPS (idle switch closed) and the engine rpm signal (engine speed above 2300 rpm). When the relay is open, the fuel
cut-off solenoid is de-energized and fuel flow is decreased. Code 42 is set if the voltage in the driver circuit remains "high" when commanded "low."
