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Questions and Answers

Acura Integra No Start And "S3" Light

Q. Good afternoon, I have an intermittent problem in starting my 1990 Acura Integra 3 door hatch back, 1.8 liter engine, automatic transmission, 110,000 miles, P/S and A/C. I have changed the fuel pump, water pump, fuel filter, and distributor. I can drive the car from one destination to another but once I get a destination and turn the car off, I have to wait sometimes 30 minutes to an hour or two before it will start again.

Acura Integra No Start And

Sometimes when the car sits over night I may have a day of when it will not start up right away. I've noticed also a light that continues to blinks in the dash board, (S3) light. I continue to spend money over and over with guessing the problem. Please help.

Thanks...

A. I could use a little more information here. Does it do anything when you try to start it? Does it not crank? Does it crank and not start?

If it doesn't crank, you have to check for power at the black/white wire on the starter. If not, then you will need to use the wiring diagram to track back from the starter to the ignition switch to see where it stops.

If it's cranking then we need to find out what is missing, spark or fuel. When it won't start, take a small vacuum line off the intake manifold and spray some carburetor cleaner into the intake. Replace the vacuum line and try to start it. If it starts and runs as long as the carburetor cleaner lasts, you'll know you have a fuel problem.

If it doesn't start, then you need to check for spark. If there is no spark, you have an ignition problem.

Acura Integra No Start And

I don't think the flashing S3 The A/T Control Unit has a built-in self-diagnosis function. The S3 indicator light in the gauge assembly and LED display on the A/T control unit blink when the A/T control unit senses an abnormality in the input or output systems. The number of blinks from the LED display varies according to the problem, which can be diagnosed by counting the number of blinks.

For problem diagnosis, count the number of blinks from the LED display and refer to Trouble Code Descriptions. If no abnormality is found from your inspection, inspect hydraulic system.

When the ignition switch is turned ON, the S3 indicator light comes on for about two seconds regardless of whether there is a problem. The S3 indicator light will also come on when in S3 mode.

If there is a system problem, the S3 indicator light will come on and continue to blink until the ignition key is turned OFF. When the ignition key is turned ON again, the S3 indicator light will not blink again for the original problem. But if the A/T control unit senses the original abnormality again with ignition switch ON, the S3 indicator light will blink again for the original problem.

Therefore, even though the S3 indicator light does not come on when turning the ignition key ON, check the LED display for automatic transmission problem diagnosis.

Since the LED problem code is retained in memory, it will blink again whenever the ignition key is turned on. If the LED problem code is not memorized, check the following causes:

  • Check the Alternator Sensor fuse (10A) in the under-hood relay box.
  • Check for an open circuit in the WHT/VEL wire between the Alternator Sensor fuse (10A) and A/T control unit B 12 terminal. After making repair, disconnect the Alternator Sensor fuse (10A) in the under-hood relay box for more than ten seconds to reset LED display memory.

Count the blinks and let me know. Then we can figure out how to fix it.

Additional Information provided courtesy of AllDATA

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