Replace faulty spark plug wires. If test light does not illuminate, go to step 18. Using a test light connected to battery positive, probe fuel pump feed terminal at fuel pump relay connector. This can happen during cranking periods where the battery voltage is too low to get 3. If circuits are okay, go to step 19.
Vpwr — Positive power source connection 6, 7. If resistance is not as specified, go to step 21. The cylinders are arranged and numbered as shown below. If ground connection is okay, go to next step. Connect injector test light to fuel injector harness connectors No. That is not noise but oscillations.
Fuel Injector Activation Timing The fuel injectors are activated either sequentially or simultaneously depending on the driving situation. And in the this article you will be explained with an example of a datasheet regarding how to read and understand the materials within it. The time lag between the time the current starts and the time the valve is fully open is called the dead time. First, engine load is calculated using just the air flow sensor and engine speed crank angle sensor for closed-loop operation, and the air flow sensor, engine speed and intake air temperature and barometric pressure for open-loop operation. After repairs, go to step 25.
After repairs, go to step 25. U4 is an inverting driver. It is unlikely that the cylinder No. This is an advanced strategy best left to professionals. If engine starts and continues to run, go to next step. Now the issue , 2002 Town and Country 3. As it turned out it was a good thing that I did check it out, but it wasn't with a high impedance unit that the problem occurred but with a low impedance injector.
We can safely use high impedance injectors with this driver also. If test light illuminates, go to step 17. Without this control of the current flow through the injector, the solenoid coil would overheat, causing injector failure. Referred to as a current controlled driver circuit, it has never been used by Toyota on vehicles sold in the U. Fuel System Electrical Circuit 1. At any particular volume air flow, a change in air temperature changes the air density. Caution: Never apply directly across a low resistance injector.
The magnetic field created causes the injector to open against spring tension. Ensure proper starting procedure is being used. This injector drive controller has an excellent control of fuel injector drive circuitry in automotive applications system, according to the datasheet. Using scan tool, command fuel pump on. After repairs, go to step 25. Disconnect fuel pump harness connector. Fuel injector activation times are increased when engine speed falls below the threshold value.
References Chrysler Corporation, 1988, 1990 Laser Technical Information Manual: Part number 81-699-9002, various pagination. Turn ignition on and note fuel pressure after 2 seconds. After repairs, go to step 43. . After repairs, go to step 25.
If test light does not illuminate, go to step 8. Otherwise, when you desired an external signal sources on the enable pins, used all these resistors while the jumper is disabled. If fuel injection is stopped in the engine, oxygen content in the exhaust stream will equal that in the atmosphere and the O2 sensor voltage output will be zero. A third type of driver circuit was used by Toyota on overseas models using the with. Despite the need to reduce emissions, there are certain operating conditions where closed loop mode is not used in order to prevent overheating the catalytic converter or driveability problems. Both emissions and fuel economy are adversely affected if fuel is delivered during closed-throttle deceleration at higher engine speeds.
If values are about the same, go to next step. Chrysler Corporation, 1990, 1991 Stealth Technical Information Manual: Part number 81-699-0114, various pagination. If test light illuminates, go to step 9. In this way, the total power consumed by the system is dramatically reduced. If voltage was greater than 4 volts, but serial data is lost while cranking engine, go to step 13.
Using a test light connected to battery positive, probe fuel pump ground circuit at fuel pump harness connector body side. Crank engine and observe spark tester. Repair open in ground circuit to fuel pump relay. Closed loop mode is used generally during warm idle, low-load cruising, and low-load acceleration to reduce engine emissions. I mostly wanted to assure myself was when the timer timed out on a long open periods with high impedance injectors that nothing funny happened.