Q: Hello, my car has no spark, no controlled ground for the fuel pump, and no injector pulse. Fuse link close to the battery and relays are good.

asked by on October 20, 2016

Won't start, no spark,no injectors pulse, no controled ground on fuel pump,fuse link close to batt are good, how can i check ecu. The red light or green light in ecu dont work can you please tell me how to check it

My car has 170000 miles.
My car has a manual transmission.

Hello and thank you for contacting YourMechanic. The ECU is under your passenger’s side seat. You can gain access to it by simply sliding the seat all the way forward and removing the plastic cover from the ECU. You can also remove the seat if you want, it makes access a little easier.

The 4-cylinder ECU has a slotted switch that turns 1/4 or 1/2 turn clockwise and counterclockwise to do the same task. Turn the ignition switch on, but do not start the engine. All of the lights in the dash should be on. Turn the ’diagnostic mode selector’ screw on the ECU fully clockwise. The Check Engine Light will go out then wait 5 seconds, and turn the screw fully counter clockwise. The Check Engine Light will then begin to flash the trouble code (number of long flashes is the 1st digit, number of short flashes is the 2nd digit).

To clear all stored codes and turn the Check Engine Light off, turn the screw fully clockwise while it is in diagnostic mode. Wait 5 seconds, then turn the screw fully counter clockwise.

If you need assistance with your no spark issue, then seek out a professional, such as one from Your Mechanic to help you with your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Car wont start - 2009 Hyundai Sonata

Hey there. The battery and starter are key components to starting the vehicle. If the battery is weak, it can cause a slow or sluggish cranking if it is not providing enough power to the starter. Also, the starter can...

Stability Light came and Check Engine Light came on. I have a misfire on number 6 plugs.

Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the ECU...

What does the service due Warning Light mean?

The service due Warning Light is located on the instrument panel. This light illuminates to remind you that it is time to service your vehicle. When the service due Warning Light appears, it does not mean that anything is wrong...

Related articles

How Engine Timing Works
Your Your car engine consists of a number of rapidly moving parts, including a crankshaft, camshaft, pistons, engine valves, rods and pulleys. As the piston moves up and down, the valves move correspondingly, in and out. The crankshaft spins, and...
P0689 OBD-II Trouble Code: ECM/PCM Power Relay Sense Circuit Low
P0689 means that the relay control switch to the PCM is sending a voltage signal that not normal due a defective PCM, battery or electrical issues.
P3444 OB2-11 Trouble Code: Cylinder 6 Deactivation/Intake Valve Control Circuit High
What What the P3444 code means This code indicates that there is a problem with your intake valve on cylinder number 6. Your vehicle’s control module identifies that the measured values from the manifold absolute pressure (MAP) sensor, the throttle...