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Intermittent hard start, stalling and crank no start, with multiple codes?

Tiny
AL514
  • MECHANIC
  • 4,675 POSTS
First checking the Radio, test 1-
pin 5 (D55) meter lead 1 and the other to a Ground, Key On
CAN B BUS + should be 2.5 volts to 3.0 volts So you will typically read the average of the those two voltages=2.8volts.

Pin 6 (D54) CAN B BUS - should be 2.4 volts to 2.0 volts-again the average will be 2.2volts. Start with that. If you read 0 volts or 12 volts or something else odd, then we know there is an issue. But all the bad wires you're finding under the dash, it sounds like you'll be going through a lot of checks.

Then the Sentry Key Module is on the Steering Column, in the diagram see where the Data Link Connector is, the module looks to be located just behind that. Look for the connector according to the wire colors, it's a 6-wire connector, I've marked the powers and ground as well as the 2 CAN B wires, again look for the 2 twisted wires, the canbus wires are always a twisted pair.
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Sunday, August 6th, 2023 AT 2:43 PM
Tiny
AL514
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I'm not sure why that posted twice. Have you cleared all those codes yet?
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Sunday, August 6th, 2023 AT 2:47 PM
Tiny
DAVID DAVO ESSIEN
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Okay. I'll check that.
Yes, I did clear the codes, but they came back on. I also cleared normal p codes separately however the codes returned back. For eg, P0403,0406,0340,0052, and 0058 were for confirmed while P0700,0403,0340,0052,0058, and 0888 came up for pending initially however when I cleared the codes, I got 0403,0406, C0300, and P2288 (1st time I think appeared. It came back twice after clearing the codes) confirmed codes. Pending remained the same except for additional P0406.
I went to the engine compartment and saw the EGR connector disconnected. EGR pins look bent, tried connecting back it's connector and reading again it still showed an EGR code.
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Sunday, August 6th, 2023 AT 3:20 PM
Tiny
AL514
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Well, I think the EGR valve is the least of the problems with this vehicle. There's no telling how many codes will come back once the vehicle is running.
I did contact a company that refurbishes and reprograms modules and they said they can program a module with the security system bypassed, and just programmed to the vin number, but that would cost $400 for that. But with all the communication codes, it's not going to help. Some shops have been at this vehicle, and if you're finding bent pins for the EGR connector I can only imagine what else they did to it.
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Sunday, August 6th, 2023 AT 3:30 PM
Tiny
DAVID DAVO ESSIEN
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Please in addition, what about at the radio connector, do I also need to check for short to ground or power? If yes, how can I test this using my multimeter or test light? What about at the transponder wiring diagram you earlier sent, do I still need to test anything there? If yes, what should I test for and what values should I anticipate for my test?
I'll first check the radio connector as you've guided me to.
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Sunday, August 6th, 2023 AT 3:36 PM
Tiny
DAVID DAVO ESSIEN
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Okay. Thank you so much for reaching out to them on my behalf. Let me check the basics -starting from CAN B then maybe later probably bypassing the security system.
I'll give you feedback on what I see. Thank you for your assistance.
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Sunday, August 6th, 2023 AT 3:47 PM
Tiny
AL514
  • MECHANIC
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We just first need to know if the CAN B circuits are active or not, some of the codes you are getting now are different than before, so if this vehicle is from another shop, they set those codes trying to figure out what is wrong here. This P0888 code is a TCM Relay code for less than 3 volts going to the PCM.
The TCM and PCM are one unit here. PCM C4 pins 18, 19, 28, 38 all should have power key on.
Does the vehicle run at all right now? And what's the oil level? This other code P2288 is reading as Oil Pressure Too High or Faulty Oil Injector.
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Sunday, August 6th, 2023 AT 4:06 PM
Tiny
AL514
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Alright, let's get back to this tomorrow, I'm not sure if you still have the old PCM, but these old codes you originally posted look like they tried messing with a new PCM and it didn't work. Here's some testing you can do tomorrow if you want, it's just checking powers to the PCM connectors C2-C4.

I forgot to add C4 pins 12, 13, 14 are all Grounds.
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Sunday, August 6th, 2023 AT 5:19 PM
Tiny
DAVID DAVO ESSIEN
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Okay. I asked the client if they've ever been a time that he has a gear issue? He admitted "yes they've been." Then a particular relay from the engine compartment was replaced. The day I asked him that, twice when I was trying to crank the engine it was a no crank no start. The engineer whose garage the car is parked told me that it has occurred before. To fix that, I swapped the starter relay with another relay from the power distribution at engine compartment. The problem was fixed.
I also gauged the oil level and saw that it was very low, it was a little closer to minimum. It was not up to the recommended maximum mark.
Yes, the old PCM is still available.
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Sunday, August 6th, 2023 AT 11:13 PM
Tiny
DAVID DAVO ESSIEN
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When checking the 22 pins radio connector, with my multimeter black lead connected to ground then the other red lead connected to pin 1 when ignition was switched to On position, I got 12.45v. When the red lead was moved from pin 1 to pin 5, I got a 0.00v. Next, to pin 6 I got 0.92v. Finally on pin 12, I got 12.45v.
Additionally, moving my multimeter range to continuity setting, with the black lead connected to ground and the red lead to pin 5, 11, and 22, there was a continuity. When the black lead of the multimeter was still connected to battery negative and the red lead to pin 5, I think they should be no continuity from the wiring diagram you sent.
On the other hand, when the multimeter black lead was moved from Battery negative to positive, and the red lead to pin 1, 6, 12 they were a continuity. When the black lead of the multimeter was still connected to battery positive and the red lead to pin 6, I think they should be no continuity from the wiring diagram you sent. If I'm wrong please correct me.
Furthermore, with ignition On, multimeter black lead connected to CAN B- and the red lead connected to CAN B+, I got 0.29v. Next, multimeter black lead connected to pin 1 and red lead connected to pin 5, I got 12.35v. While the black lead still connected to pin 1 and the red lead connected to pin 6, I got 12.02v.
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Tuesday, August 8th, 2023 AT 8:41 AM
Tiny
DAVID DAVO ESSIEN
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What should I do next, please?
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Tuesday, August 8th, 2023 AT 9:45 AM
Tiny
DAVID DAVO ESSIEN
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The voltage there, please are they okay?
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Wednesday, August 9th, 2023 AT 1:59 AM
Tiny
DAVID DAVO ESSIEN
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I have just seen the FCM front control module, you once sent that I said I can't locate it.

https://drive.google.com/file/d/1nZQtpE8DuGGQoeA4Lc9Iob-BBbRfzs0H/view?usp=drivesdk

That's the link above for the codes I got. Please should I proceed with the replacement of the TIPM? Should I tell the client to replace TIPM, that is, the FCM and IPM to fix the whole issues with the car permanently?
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Monday, August 14th, 2023 AT 8:18 AM

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