No crank situation

PHATE1606

MEMBER
1999 PLYMOUTH BREEZE
140,000 MILES

Ok.I have a 99 breeze with a 2.4ltr engine. I just replaced the motor and on the 4th day I drove it. Ran into the store to get something. And then it wouldn't start! I figured a bad starter so I checked voltage and got 12.56 at battery, 12.5 at starter, and 12.45 at alternator. I checked to see it the engine was seized, and it turns freely and still has its compression. I bench tested the starter, and it works. I went back to the vehicle and checked relays, fuses, ign. Switch, park/neutral safety switch, and wires. Nothing out of the ordinary. I checked camshaft and crankshaft sensor, I got 8.6V steady. But when I checked ignition coil and fuel injectors, I only got 2.3mv, for a split second when you turn the key to the run position you get a crazy 357.7V reading. The ASD (auto shut down) relay makes a constant buzz noise when the key is in the start position, and sometimes the starter relay will kick, but engine still does not crank. If you jump the starter relay. The starter just clicks. I'm completely lost, I got even the dealer technicians stumped as they gave me wiring diagrams. Any clues for this car? Did I over look something? Any response about this would be greatly appreciated! Thank you for reading this.

2 Replies

JACOBANDNICKOLAS

MECHANIC
108,133 POSTS

NOTE: My email through yahoo hasn't worked all day. Thus, I won't get any replies from you until they fix it.

Did you try switching the starter relay with one that has the same part number? Have a friend turn the key to the start position while you check for power to the smaller wire on the starter. If no power, check the wiring to back to the relay, and ignition switch. Where did you get 357.7 volts? Finally, have you tried to bypass the ASD to see if that is the problem? NOTE: Only bypass it to check. It needs to be functional.

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Friday, September 23rd, 2011 AT 4:03 AM

PHATE1606

MEMBER
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Yes.4 fuses have the same part number: starter relay, ASD, rad HI, and rad LO. I swapped both the starter relay and ASD with the rad HI and LO relays. I have power to all the relays(spade labeled 30). And the ASD has 2 powers which I found odd (spade labeled 30 and spade labeled 86). I have power to ignition switch and when jumped, it does NOT start the car. So the switch is good (so I was taught). There is 2 wires on the starter, one is constant from the battery with NO fuseable link, and the other is activated only when you turn the key to the start position. Both have voltage. But the starter does not click or engage. When I have it out the car and bench test it. Its fine. 357.7V came from the ignition coil on top the motor and only happens for 1 sec. I heard it is supposed to be 12V for 1 sec (dealer told me). How do you bypass the ASD? It controls the pcm, ign coil/distributor, and generator, (according to the schematic), and supposed to deliver the constant 8V to the camshaft and 12V to fuel injectors and Ign coil (as the dealer told me). I have checked grounds. From the neg terminal on battery to the driver side strut tower, from neg terminal on the driver side strut tower to transmission, one on the rear of the motor next to the egr for engine harness, the ground straps on the top of the motor next to the p/s resevior to the passenger side strut tower. The ground from the PDC (power distribution center) to the driver side strut tower. The starter is grounded through the motor. I have absouletly no clue what is wrong! Would you agree it is the PCM not calculating correct voltage? Or do you think that the ign switch is bad and I am not testing correctly? Any insight would be great, thank you again! I'm just trying to catch you up to speed with what I did.

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Friday, September 23rd, 2011 AT 6:42 AM