1997 Dodge Caravan Rodent chews Injector wiring '97 Dodge V

Tiny
SEPHBARNARD
  • MEMBER
  • 1997 DODGE CARAVAN
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
Recently a rodent chewed through 2 of my injector electrical lines.. (Injector 1 and 2) ah the Joys of Spring! I replaced and re-soldered the chewed portions with similar. However one of the lines is not working. Having tried to reset all I still get error message 27 "Injector #1 output driver does not respond properly to the control signal"

I then switched injector 1 cable and put it on 2 to see if it works - the injector in one works with cable two - while injector 2 does not work with cable one. - That leads one to think cable 1 is the culprit - however I looked at the cables again - they were not reversed soldered - I then checked with a multimeter and the circuits seem fine?


I'm now totally puzzled - can the chewing have resulted in the ECU shorting out? It seems that they would have some sort of fail safe?

I trust this is a suitable mystery for an eletrical expert! I've spent days seraching the web, but don't see anyone experienceing a similar problem?

Thank you for your expert opinion in advance!

Seph
Tuesday, April 7th, 2009 AT 7:33 AM

2 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Best bet would be to get a noid light to see if the injector is flashing when running. One side of the injector plug should be 12 volts, the other is ground that fluctuates (PCM signal) It could have shorted out the PCM driver for that cylinder, they dont figure in rodents when designing the system, they barely figure in the guys that have to try to fix them. Lol
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Tuesday, April 7th, 2009 AT 8:02 AM
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
The computers do have a lot of protection built in. First, try disconnecting the engine computer connector for a minute to erase the fault codes. The circuit should have reset after turning the ignition switch off and back on, but try this anyway. I would strongly discourage disconnecting the battery because of the frustration involved in recalibrating the HVAC controller.

When you have the connector off, measure the injector circuits for continuity.

Caradiodoc
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Tuesday, April 7th, 2009 AT 8:38 AM

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