No crank, no start?

MUSKY 2

MEMBER
2005 SATURN ION
2.2L
4 CYL
2WD
AUTOMATIC
164,000 MILES

Turn the key to start, dash lights come on, only sound is relays clicking. Security light comes on for 5 seconds and then goes off. It isn't flashing. I have installed a new ignition switch, fuel pump, Crankshaft Position Sensor. Checked all relays and fuses. I used a cheap scanner that said Crank Sensor needs Relearn code. The security light was flashing earlier, so I tried the 30-minute process of switch turn to crank release back to on position wait, Security light is supposed to blink ten minutes, then go off. Do two more times as the first and start up. When I turn the key to start the car and release back to on, it doesn't start. Now I try again but the light comes on for 5 seconds then goes off so I can't do the security relearn. If I turn the key to the on position, pour gas in throttle body and jump across starter hot terminal and purple solenoid wire; car cranks up and runs a few seconds. Injectors are getting fire to one side but no pulse to the other side. Help please?

Friday, November 18th, 2022 AT 6:28 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Hi,

If the starter isn't engaging with the key, there are a few things that need to be checked. First, will it start in neutral? If not, then I need you to check a few fuses.

If you look below, I attached the wiring schematic for the starter circuit so that you have a reference.

First, in the under-hood fuse box, check ignition fuse 11 and crank fuse 46. In addition to checking the fuse, confirm there is power to them. Both fuses will require the key either in the run position or start position.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If both fuses are good and have power to and from them, then we need to check the powertrain relay and the ECM Cont relay 31. If there are other relays with the same part number, switch them to see if it makes a difference. If there isn't, here is a link that explains how to test a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the relays are good, then go to the starter and check if the purple wire at the starter gets power when the key is in the start position. You will need a helper for this.

Let me know what you find. Also, the last pic shows the fuses and relays to check.

Take care,

Joe

See pics below.

Images (Click to make bigger)

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Friday, November 18th, 2022 AT 10:50 PM

MUSKY 2

MEMBER
1 POST

2005 Saturn Ion; Fuse 47 in under hood box, when I pulled it out, used a test light to see if prongs under fuse fire had; both sides have fire with fuse removed. Is that a short circuit? I'm still getting no crank over and no start but jump starter solenoid purple wire to big battery terminal on starter, it cranks over good but no start up. I replaced BCM under dash and computer under hood or ECM; I got security light flashing, did the 30 minutes relearn, still will not turn over by key. These were used but the ignition switch is new.

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Monday, November 21st, 2022 AT 11:06 AM

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Hi,

Something is shorted. You shouldn't have power on both sides where the fuse goes without the fuse.

Here is what I'm suggesting. Disconnect the battery negative and remove the fuse box. It sounds like something under the box in the connectors has failed and is causing this to happen.

Let me know what you find. Also, just out of curiosity, with that fuse removed, check to see if any of the interior fuse box I attached below have power. The power from fuse 47 feeds several things.

Also, remove fuse 39 from the under-hood fuse box and see if you only get power to one of the terminals on 47.

I'm looking at the schematic and they have fuses 47 and 39 connecting to the same circuit at the BCM which doesn't make sense to me. The problem may be at the connector on the BCM. See pic below.

Let me know.

Joe

See pics below.

Images (Click to make bigger)