No Spark?

Tiny
TPMPRODUCTIONS
  • MEMBER
Nope, the security light does not flash when I try to crank it. However, I posted a picture of the last time I did a scan on it. It said security system, fuel disabled. Hold up I'll attach it. This is after changing the PCM. The same issue. Apparently, it isn't the PCM. I did the key relearn properly and the security light doesn't come on when I cycle the key. But it still doesn't power the fuel pump, this picture kind of explains it.
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Friday, July 10th, 2020 AT 2:44 AM
Tiny
KEN
  • ADMIN
If you jump the power terminals at the relay does the pump run?

This guide should help:

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

Please run down this guide and report back.
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Friday, July 10th, 2020 AT 11:36 AM
Tiny
TPMPRODUCTIONS
  • MEMBER
Haven't tried jumping the terminals however, if the security isn't powering the fuel system then that's the issue right? I've changed the relay, fuse (fuel pump) and the actual fuel pump itself. Still no power, but I'll try that. Will it make a difference though?
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Saturday, July 11th, 2020 AT 12:17 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

If you have power at the relay, by jumping them, the pump should run. You are bypassing the relay in this case and simply sending power direct to the pump.

Joe
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Saturday, July 11th, 2020 AT 7:32 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
Okay, to further update, I've spoken to GM about the issue. The lady was very nice by the way. She spoke to a tech about my issue and they believe it is the transponder chip in my key that is causing this. After reading up on the PK3 and the keys, I believe this is the issue. It says that the key sends the password to the bcm. The BCM then sends the clearance to the PCM and the PCM gives the signal to the fuel pump relay. If there is an issue with the key the bcm will tell the PCM to not start the fuel system. I saw something about fuel enable, I forget at times (it's the ADHD). It could also be the bcm as well. I'll start with the keys first just to make sure that's the issue. I wonder if I can open my key just to make sure it didn't get dirty or some sort of liquid in it. So yeah I'm ordering new keys and will have them cut. Then I might go to the dealer to get them programmed if I can't do it myself.
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Friday, July 17th, 2020 AT 11:59 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

If it is the security system, then if you leave the key in the on position for about 10 minutes, the security light should turn off and the car should start.

As far as the key, there really isn't anything in it that should cause the vehicle not to recognize it. Also, if you do get a new key, as long as you have the original key, you can program it at home. Here are the directions:

_____________________________________

2006 Buick Truck Rendezvous FWD V6-3.5L VIN L
Adding Keys (Domestic)

IMPORTANT:
- You may add up to 10 additional master keys or valet keys using this procedure when a learned master key is available.
- This procedure adds keys only. The procedure does not erase previously learned keys.
- The keys to be learned must duplicate the mechanical cut of the current key.
- If more than one valet key is to be learned, immediately precede each valet key with a learned master key.

1. With a previously learned master key, turn ON the ignition, with the engine OFF.
2. Turn OFF the ignition and remove the key.
3. Within 10 seconds insert the key to be learned. Turn ON the ignition with the engine OFF. The vehicle has now learned the new key.

_____________________

Let me know if that helps.

Joe
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Friday, July 17th, 2020 AT 2:55 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
Thanks. I did read that sometimes the key can stop working and that's when it needs to be replaced. That's where I got all of that info from. I have been consumed with this. I love learning and dislike not knowing something.
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Friday, July 17th, 2020 AT 4:18 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
It's worth a try. Let me know if it takes care of the issue.

Take care,
Joe
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Friday, July 17th, 2020 AT 6:37 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
Okay, so look, the security system is the issue, but the light doesn't come on when I turn the key. The only time it came on was when I changed the PCM. Once the key was learned it went off. Still it went back into fuel disabled. I am thinking the part 10319888 has something to do with this. I got no info on it online though. That's the theft locking module. I did mess with it trying to get it to work so maybe that could be causing the issue? I unplugged it and checked the wires. It doesn't work correctly though as I stated before. The key-less entry doesn't work, and I have a code for it.
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Saturday, July 25th, 2020 AT 12:57 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
I know the receiver and transmitter need to be programmed when new, but I don't think unplugging it would require it. I don't even know if that would cause a no start. The receiver is specific to the key-less entry.
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Saturday, July 25th, 2020 AT 9:48 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
Oh, okay. I was curious about that because the name of this unit is specifically called the "Theft Locking Module" it's very hard to find online unless you look up that exact name or the part number. It's not the key-less entry module like on other cars. Just raised my suspicion. However, I'm still looking for an answer as to why my key isn't sending the right signal to the BCM. I'm looking for it and I'm waiting on the dealership to contact me. Haven't heard from them yet.
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Saturday, July 25th, 2020 AT 11:56 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
Also, did I mention that I had a code for B3103? Key-less Entry Data link circuit high. It's plugged in but it's only 4 wires coming to it. The replacement connectors I see online have like 6 wires. Plus only three wires are connected. Haven't checked them to see if they have power. The security light is also missing from the dashboard. There is no light or connector, only wires.
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Sunday, July 26th, 2020 AT 12:02 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The codes indicates a short to power. Take a look through this information and diagnostic procedure and let me know if it helps. The attached pic is the diagnostics.

_________________________________

2006 Buick Truck Rendezvous FWD V6-3.5L VIN L
B3103
Vehicle ALL Diagnostic Trouble Codes ( DTC ) Testing and Inspection B Code Charts B3103
B3103
DTC B3103

CIRCUIT DESCRIPTION
The remote control door lock receiver (RCDLR) communicates with the body control module (BCM) through the key-less entry serial data circuit. When any button on the key-less entry transmitter is pressed, the transmitter sends a signal to the RCDLR. The RCDLR sends a lock, unlock, rear release, or panic alarm request to the BCM, depending on which button is pressed on the transmitter. The BCM receives the message and performs the appropriate function. The BCM also uses the key-less entry serial data circuit in order to communicate with the RCDLR when programming transmitters.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3103 Key-less Entry Data Link Circuit High

CONDITIONS FOR RUNNING THE DTC
- The system voltage is at least 9.0 volts and no more than 16.0 volts.
- The BCM must be receiving a message from the RCDLR while in the program mode.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to voltage in the key-less entry serial data circuit.

ACTION TAKEN WHEN THE DTC SETS
The key-less entry system will not operate.

CONDITIONS FOR CLEARING THE DTC
- A current DTC will clear when the fault is no longer present and the ignition switch is cycled.
- A history DTC will clear after 100 consecutive ignition cycles without a fault present.
- A scan tool may be used to clear history and current DTCs.

DIAGNOSTIC AIDS
- Always begin diagnosis with the first DTC listed on the scan tool.
- Perform a visual inspection for loose or poor connections at all related components.
- If the DTC B3103 is a history DTC, the fault may be intermittent.

TEST DESCRIPTION

Step 1 - Step 9

See pic 1

The numbers below refers to the step numbers on the diagnostic table.
3. B+ voltage should be present on the serial data terminal when tested with a DMM, but should not illuminate the test lamp. An illuminated test lamp indicates a short to voltage in the serial data circuit.
4. This step checks for a short to voltage in the key-less entry serial data circuit.
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Sunday, July 26th, 2020 AT 1:54 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
Yes I'm familiar with the procedure, I'm just wondering if that short would cause damage to the BCM.
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Sunday, July 26th, 2020 AT 9:12 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
In all honesty, I'm not sure. Anything is possible. Other than testing, it becomes a guessing game and I don't want to see you spend more to fix the issue than needed.

Hope you understand.

Joe
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Sunday, July 26th, 2020 AT 9:20 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
Okay, sorry I kept you all waiting but here goes nothing.
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Tuesday, August 11th, 2020 AT 5:10 PM
Tiny
TPMPRODUCTIONS
  • MEMBER
So, I just got my car back from the dealership like three days ago. Dealer said the issue was the crank. Allegedly, the crank sensor wires were touching the transmission and it grounded out. So my crank signal wasn't going through. He also said oil leaked into the crank sensor wiring harness so that's what did it. He said he tied the wires up and now it's running. Rough. It's running really rough. Like I have a large evap leak. I have a code P0171 which is sounding like a oxygen sensor possibly. However it wasn't running like that before. I'm curious as to what happened. I did notice that the guy who towed my truck had a real bad attitude. He charged me $275.00 to tow my truck. However, looking at my records, I only got charged $75.00. I wonder if he did something to my car. Purely speculating.
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Tuesday, August 11th, 2020 AT 5:25 PM
Tiny
KEN
  • ADMIN
Hard to say but we are glad you got it running for the rough running problem please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
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Wednesday, August 12th, 2020 AT 12:37 PM
Tiny
TBACER
  • MEMBER
  • BUICK RENDEZVOUS
I have a 1992 buick la sabre with a 3800 engine and about 130k miles It was parked in the cold (around 0) and had troubles starting. One day my son couldn't get it to even crank over. It sat for about 3 weeks I replaced the battery and it would crank but would not start. I am getting fuel but I can't get a spark. I don't know what to replace. The coil pack is new because thats the only thing I could get on a suday afternoon. I am not sure how to check if the cam sensor to see if it is good or the module and I guess there are two different kinds ac delco and magnovox and ideas
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Wednesday, August 12th, 2020 AT 12:55 PM (Merged)
Tiny
CHEII
  • MEMBER
Hi.
Did you replace one coil or all? This really could be alot, we can try and narrow it down a bit

jim
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Wednesday, August 12th, 2020 AT 12:55 PM (Merged)

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