1. Home
  2. Chrysler Cars
  3. 1991 Chrysler Imperial Engine Controller No Start Condition

1991 Chrysler Imperial Engine Controller No Start Condition

I guess I should start at the beginning; I was driving the car when the engine shut down. When this happened, I checked the dash and the alarm light was on (solid not flashing). Several attempts to start the car failed and I had it towed. I have attempted to check the engine controller and I cannot get it to got in diagnosis mode. I am using the prescribed method in the factory service manual. I cannot get it to work at all (will not even flash 55). As a last effort, I have disconnected the car battery and allowed the vehicle to sit for a day with no results. I have also removed the instrument cluster to check the bulb that light the "check engine" light. The service manual describes a "no start" condition if the alarm module is removed and the car is not running. I believe that this is the case.

Is there any other method short of having the car towed to the dealer to diagnosis/reset the engine controller?

Has any one else experience this problem.

I already have a obdII tool for my jeep, will an obdI reset the computer and solve the "no start condition"?

Any and all help is GREATLY APPRECIATED!!!

Thanks

Bill Messick

Reply to
William R. Messick
Loading thread data ...

Which is described as?

With he battery connected, the ignition switched on and he engine not running, does the check engine light illuminate?

There is a known history of Chrysler SBECs suddenly deciding that they are in anti-theft mode, so you may be correct but you should still be able to pull trouble codes.

Depends on how you answer my second question (does the CE light come on?).

No. Your 91 system is definitely not OBD2.

Reply to
Neil Nelson

ON-OFF-ON-OFF-ON

NO SIR

Reply to
William R. Messick

Also, what scan tool would be the best to read the codes?

Thanks again

Bill Messick

Reply to
Bill Messick

The fact that you have no check engine light at all suggests that the computer isn't powering up , anti-theft mode is characterized as a start then a stall within one or two seconds but it doesn't usually effect the ability to extract codes or keep the CE light from coming on when it should.

I'd be checking all battery, ignition and ground circuits to the SBEC. You could also have a sensor shorting out and pulling the system down, you can try disconnecting all the sensors and then see if the CE light comes back with the key on engine not running.

Reply to
Neil Nelson

The DRB from that era would be the obvious choice since its use would allow that the factory troubleshooting procedures be followed exactly. Their isn't anything about this system that would lead me to believe that the Snap-On MT-2500 or an OTC 4000 couldn't also be used, but... I don't think a scan tool is going to get you very far other than the realization that the scan tool can't communicate with the data stream because the system isn't waking up as it should.

Reply to
Neil Nelson

I will check that today, it makes sense that the sbec is not getting power because of the CE light not working. By chance is there a fuseable link or fuse that protects the module from shorting out?

Reply to
Bill Messick

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.