Originally Posted by
pizzaguy
I have only the 2005 SRT and 2007 Limited service manuals. GOt them both from this very site, in PDF form. My documents are not better, it's just that I've been leafing thru them, helping others, working on my three roadsters since 2009.
OK, you have the "myster no start" but in your case, the Engine Control relay pulls in. You know the starter and pulse module are OK. But do you KNOW the engine control relay is actually closing well enough to pass 12 volts for the ECU to start up? Here is a test:
Turn key to start, if it does not engage the starter, release to "ON".
Wait 45 seconds.
If the engine fan warps to high speed, your problem is no power from the RCM to ECU. You can find the problem with a voltmeter, either the RCM you have has a bad engine control relay (contacts bad) or the solder joint at the connector is fractured, the fuse on the RCM is blown or there is trouble in the harness.
If the engine fan does NOT run really fast, you have:
... a bad clutch interlock switch (manuals only)
... a bad shift lever assembly (autos only)
... a bad traction control relay on the RCM (or, again, fractured solder where the connector mates with the circuit board on the RCM).
... a defective ECU (never happens)
... a serious problem with the CAN BUS such that the Shift Lever Assembly (SLA) can't talk to the transmission control module (TCM) or between the TCM and ECU.
Make sure the fuses on the RCM are all good.
- Auto transmission
- no cooling fan rotation
- all fuses on RCM verified good
- Traction control output RCM plug C 4 &5 verified
- illumination mod fuse 4 (power for shift and trans mod) verified
am now determining what options I have for verifying CAN bus operation.
The start sequence, as I recall, when Key is in "on" the fuel pump will run for 2 seconds, but should only happen in park or neutral.( not happening on mine) Do any of the lights on the dash extinguish as the different mod come on line and report to the ECU.
On mine the TPMS lamp goes out,(discreet connection) and seatbelt lamp goes out. Can't remember if anything else changes or does the dash stay like that until engine start. Just trying to determine if the car is providing any clues on CAN bus health.
When shifter is moved from park to drive ,reverse it displayed up on the instrument cluster so believe that mod is good.
Think I will pull trans mod and verify power to board.
Currently looking at what options I have to check CAN bus
Thanks for the pointers