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Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Dodge
Satisfied Customers: 12828
Experience:  30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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town and country: 2003 town and country wont start

Customer Question

2003 town and country wont start
Submitted: 11 months ago.
Category: Dodge
Expert:  Tim Mohr replied 11 months ago.
Hi,my name is XXXXX XXXXX there a red security light illuminated on the dahs when you try to start it?
Customer: replied 11 months ago.

No there is not. I have an LX model and I do not believe it includes any type of security feature.

Expert:  Tim Mohr replied 11 months ago.
this does have the immobilizer for the key, if it does not see the proper signal from the key, it will start for a few seconds and die, it will do this 5 times, then on the 6 try, if the signal is not present, it will shut off the starter for 1 hour, is this waht its doing?
Customer: replied 11 months ago.

No. I have not noticed any kind of pattern like that. Plus my keys are just "dumb" keys.

Expert:  Tim Mohr replied 11 months ago.
so right now, the starter does not even turn over?
Customer: replied 11 months ago.

correct

Expert:  Tim Mohr replied 11 months ago.
ok, do you have a volt meter or test light? we need to see if you have 12 volts to the small wire at the starter when cranking?
Customer: replied 11 months ago.

I have checked that. The starter relay is not firing due to lack of ground on the coil (terminal 85). I can get the starter to engage if I jump a ground to that terminal of the relay, and turn the key. However it will not start. From what I have read, the PCM is responsible for the ground reference. I also tested that terminal 76 on the PCM is switching to ground when the transmission is in park or neutral, and that terminal 20 is getting 12vdc when ignition is switched to on.

Expert:  Tim Mohr replied 11 months ago.
ok, this ground comes fromthe computer, the computer has to see the trans in park or nuetral to give this termional ground, have you tried putting the trans in nuetral and starting it?
Customer: replied 11 months ago.

I have. I have tried moving the shifter up and down while engaging the key to start. That has had no effect. Terminal 76 on the PCM harness shorts to ground consistently only when the trans is in park or neutral.

Expert:  Tim Mohr replied 11 months ago.
then the transmission range sensor is good, and most likely a bad computer, have you had this on a scanner yet to see what the sensor reading is?
Customer: replied 11 months ago.

I have an OBD II scanner here, but getting no codes.

Expert:  Tim Mohr replied 11 months ago.
on the datstream, is it showing the correct position of the shifter?
Customer: replied 11 months ago.

If the scanner has the capability to tell me that, I cant find it.

Expert:  Tim Mohr replied 11 months ago.
do you have a scanner or just a code reader?
Customer: replied 11 months ago.

It claims to be a scanner, but I can't find anything in the manual that has the capability to show shifter position. Is is an actron CP9175

Expert:  Tim Mohr replied 11 months ago.
this does not have a live datastream on it, just basic codes and freeze frame info, from what you said, the trans sensor is working if the wire is grounded when in nuetral and park, this just leaves a bad computer not grounding the relay for the starter, the only other thing that could cause this is the antitheft is enabled, but you would need a scanner with datastream to verify this also,Tim
Tim Mohr, ASE MASTER TECH
Category: Dodge
Satisfied Customers: 12828
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
Tim Mohr and 4 other Dodge Specialists are ready to help you
Customer: replied 11 months ago.

When you say bad computer, do you mean the PCM?


 

Expert:  Tim Mohr replied 11 months ago.
Yes

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