The fuel pump ECU (Engine Control Unit) on a 1993 Lexus LS400 is located in the rear of the vehicle. To access it, you will need to remove the rear passenger seat and the metal cover. Once removed, you can disconnect the wire harness and lines to remove the fuel pump.
Please note that the information provided is based on search results and may not be exhaustive. It is always recommended to consult the vehicle’s manual or seek assistance from a qualified mechanic for accurate and specific instructions.
Contents
- How does the ECU control the fuel pump?
- Where is the fuel pump relay on a LS400?
- Where is the fuel pump ECU on a LS400?
- What are the symptoms of a faulty ECU?
- Where is my fuel pump control module?
- How can I tell if my fuel pump relay is bad?
- How do I know if my fuel pump control module is bad?
- Is the ECM and ECU the same thing?
- Where is the fuel pump control module on a Lexus gs300?
- Where is the ECU module located?
How does the ECU control the fuel pump?
- The Engine Control Unit (ECU) or Powertrain Control Module (PCM) is responsible for controlling the fuel pump ON/OFF signal in most vehicles.
- When the ECU determines that fuel needs to be injected into the engine, it sends a signal to the fuel pump relay to turn on the fuel pump.
Where is the fuel pump relay on a LS400?
It’s on the left side of the engine bay, bolted directly to the wall of the bay. It’s a smallish, riveted looking metal box with a wire running from it (obviously).
Where is the fuel pump ECU on a LS400?
1992 LS400 – According to my service manual, the fuel pump ECU is located on the passenger side, inside the trunk area, at about a 45 degree angle, one foot down from fueling nozzle.
What are the symptoms of a faulty ECU?
These may include poor engine performance, stalling, misfiring, rough idling, poor fuel economy, check engine light, or no start condition. Some of these symptoms may also indicate other issues, such as faulty sensors, wiring, or spark plugs, so you need to rule them out before blaming the ECU.
Where is my fuel pump control module?
More often than not, the fuel pump driver module (FPDM) is located in the back of vehicles. The exact location varies depending on the make and model of your ride, but it’s usually on the underside — specifically on the rear end of the frame. The fuel pump driver module controls the power allocated to the fuel pump.
How can I tell if my fuel pump relay is bad?
Since the relay isn’t closing like it should the pump can’t build up standard fuel system. Pressure. No pressure means cranking the starter has to overcome that lack of initial fuel as.
How do I know if my fuel pump control module is bad?
Common Failure Symptoms
- No start.
- Rough idle.
- Loss of power.
- Hesitant acceleration.
- Intermittent engine performance.
Is the ECM and ECU the same thing?
What Do ECM and ECU Stand For? ECM stands for Engine Control Module, and ECU is short for Engine Control Unit. These two acronyms represent the same component and are used interchangeably.
Where is the fuel pump control module on a Lexus gs300?
Which is held in by three 10 millimeter plastic. Nuts. Doing this exposes the fuel pump connector. And the fuel feed line remove the connector by pushing in the plastic Tab and pulling it out.
Where is the ECU module located?
Often varies from car model to car model this is why when it comes to locating your ecm. It’s best to consult your vehicle’s owner manual to find the exact location. But typically they are found in
