This thread is a continuation of a "no crank no start" problem originating under pulse module.
2005 crossfire
Automatic
quick summery;
- car was having intermittent fuel pump relay issues but car was due for winter storage so problem resolution differed to spring
- Re connected a fully charged 1yr old battery after storing the car for the winter.
- was having a problem with battery drain, so disconnected siren
- I have never experienced the 3 start skreem fault sequence
- ordered new relays (needs wings) and replaced fuel pump relay
- all fuses checked, OK, No rad fan run up symptom, manually closed start relay on pulse mod and starter fired.
- wired a momentary switch from inside the driver door to pulse mod to provide gnd and starter circuit turned over engine. This is how I start the car with the key in the start position
- wired a gnd to fuel pump relay primary side to supply fuel and car will start and run.
- used car as daily driver with no problems other that my 2 modifications and a check engine light
- check engine light on with a 2/2 O2 sensor heater fault. Ordered new O2 sensor and installed, did not resolve the problem
- output from both downstream sensors similar, when at operating temps
Had knee replacement surgery, sold my home, put everything in storage and no time to troubleshoot.
Trailered my Crossfire to Florida and have resumed troubleshooting.
- ordered a new RCM (Amazon) and installed
- new batteries installed in both keys, all wires removed for my mods and original wires reconnected(car put back in factory condition) and still no crank
- swapped bank one and bank two O2 sensors but fault did not move
- voltage check on ECU side of heater circuit for downstream bank 2 indicates no gnd or low pulsing voltage similar to the readings I measured on downstream bank 1 ECU side of heater circuit
- readings taken at plug C211, with nothing between the ECU and this plug.
Cannot understand how this circuit became faulty as I can't see any wiring damage due to mice or other rodents chewing on them. Vehicle was wintered indoors.
I am still driving the car and have tried using most functions (automatic spoiler deploy, cruise control, anti theft, garage door opener, door lock; unlock) and all work
At this point, I would like to swap in an ECU from another crossfire just to see if this circuit works. I read through the thread on ECU repair and the chip replacement approach looks doable if it gets to that point.
Alternatively just drive it as it is and not through any more $$$ at it. (not preferred)
Any suggestions