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No Bus code 1698

Tiny
TGAROU47
  • MEMBER
  • 2000 DODGE DURANGO
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 214,000 MILES
Fuel pump stopped, replaced it started up first try warmed to operating temperature shut off wouldn't start. Replaced cam sensor, crank sensor, complete timing assembly, PCM, TCM. Please can you help? I cannot afford new truck at this time. I'm stumped.
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Saturday, May 8th, 2021 AT 4:53 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

This code can be set if the TCM is disconnected, but that usually isn't the problem. Either you have a bad connection or a bad PCM.

If I understand, you have replaced both the PCM and the TCM. Is that correct? If you have replaced with new parts and properly installed, the problem has to be in the wiring or a connector. Visually inspect the related wiring harness and connectors. Make sure none of the pins in the connectors are pushed in, corroded, or damaged.

Read more: https://www.autocodes.com/p1698_dodge.html

Do me a favor. Take a look through the attachments below. They are the diagnostics for a P1698. Let me know if this is something that you are comfortable doing.

You know, I'm sitting and thinking about this. If the starter is engaging, the engine should start even with this code unless the PCM has other issues. Also, low battery voltage can set this as well.

Let me know.

Joe

See pics below.
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Saturday, May 8th, 2021 AT 10:44 PM
Tiny
TGAROU47
  • MEMBER
  • 5 POSTS
Tried starting we wants to start reader said speed circuit input a not functioning.
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Sunday, May 9th, 2021 AT 12:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

I think I understand what you are saying. Have you disconnected the TCM at any point? If so that can cause the error.

Let me know.

Joe
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Sunday, May 9th, 2021 AT 8:01 PM
Tiny
TGAROU47
  • MEMBER
  • 5 POSTS
Yes.
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Monday, May 10th, 2021 AT 1:51 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Okay. That is the likely cause. Are you able to continue with the diagnostic tests above?
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Monday, May 10th, 2021 AT 8:12 PM

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