No starter engagement, no spark, no fuel pressure

The SFI system monitors the engine condition through the signals input from each sensor (Input signals from (1) to (11) etc.) To the engine control module. And the control signal is output to terminals #10, #20, #30, #40, #50 and #60 of the engine control module to operate the injector (Inject the fuel). The SFI system controls the fuel injection operation by the engine control module in response to the driving conditions.

Here is the list and description of sensors involved.

1. INPUT SIGNALS
1. Engine coolant temp. Signal circuit
The engine coolant temp. Sensor detects the engine coolant temp. And has a built-in thermistor with a resistance, which varies according to the engine coolant temp. The engine coolant temp. Is input into terminal THW of the engine control module as a control signal.

2. Intake air temp. Signal circuit
The intake air temp. Sensor is installed in the mass air flow meter and detects the intake air temp. Which is input as a control signal to terminal THA of the engine control module.

3. Oxygen density signal circuit
The oxygen density in the exhaust emission is detected by the heated oxygen sensors and input as a control signal to terminals OX1A, OX2A, OX1B and OX2B of the engine control module.

4. RPM signal circuit
Camshaft position is detected by the camshaft position sensor and its signal is input to terminal G2 of the engine control module as a control signal.
Also, engine RPM is detected by the crankshaft position sensor and is input as a control signal to terminal NE+.

5. Throttle position signal circuit
The throttle position sensor detects the throttle valve opening angle as a control signal, which is input into terminal VTA of the engine control module.

6. Vehicle speed circuit
The vehicle speed sensor (Electronically controlled transmission) detects the vehicle speed and inputs a control signal to terminal SP2+ of the engine control module.

7. Battery signal circuit
Voltage is constantly applied to terminal battery of the engine control module. With the ignition SW turned ON, the voltage for engine control module start-up power supply is applied to terminals +B, B2 of the engine control module via the EFI relay.
The current flowing through the IGN fuse flows to terminal IGSW of the engine control module.
Voltage is constantly applied to terminal BM of the engine control module.

8. Intake air volume signal circuit
Intake air volume is detected by the mass air flow meter and the signal is input to terminal VG of the engine control module as a control signal.

9. Stop light SW signal circuit
The stop light SW is used to detect whether the vehicle is braking or not and the signal is input into terminal STP of the engine control module as a control signal.

10. Starter signal circuit
To confirm whether the engine is cranking, the voltage is applied to the starter motor during cranking is detected and the signal is input into terminal STA of the engine control module as a control signal.

11. Engine knock signal circuit
Engine knocking is detected by knock sensors and the signal is input into terminals KNK1 and KNK2 as a control signal.

Wow! Anything to make life a little more difficult. I wish people would check parts before selling them. I honestly wonder if they are sold knowing there is a problem, and the seller hoping you don't return it. Ugh! When you indicated the low voltage at the ECU as well, I had a feeling that was the problem, but knew you also just installed it.

Let me know.

Take care,

Joe

Hello my friend. I'm still here. As far as the knock sensor, it is used to retard ignition timing if the engine begins to knock due to the timing being too far advanced. By finding that balance, the timing is always kept at the point of best efficiency. Do you need help with location or anything like that? You indicated one was disconnected. That will set a code, but shouldn't cause no injector pulse.

If possible, give me an update as to what is happening, what has been done since we last spoke and anything you feel I need to know.

Let me know and take care,

Joe

Hi,

I totally understand. Life hasn't been the same since everything that has been happening. As far as programming, you shouldn't have to do it even though it was disconnected.

Let me know how you are making out with it.

Joe

You have the same kind of luck as me. LOL Listen, I hate to ask this, but I need you to start a new thread with the question regarding the cam. We are trying to keep the threads specific to one topic so they help others. I hope you understand.

Joe