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Threw fan belt,replaced,cranks but won't start, get p0688…

Customer Question
Threw fan belt,replaced,cranks but...

Threw fan belt,replaced,cranks but won't start, get p0688 code.Art

Mechanic's Assistant: What shape is the fan belt in? Is it cracked, shiny, or frayed? And have you ever replaced one?

It's now a new one

Mechanic's Assistant: What is the model/year of your Jeep?

07 commander sport,4.7 quadratic II

Mechanic's Assistant: Are you fixing your Commander yourself? What have you tried so far?

Checked pulleys for binds/lockups, replaced belt, checked battery,12.6 v.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

What P0688

Submitted: 11 months ago.Category: Jeep
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Answered in 6 hours by:
8/2/2017
Jeep Mechanic: sprinkles08, ASE Certified Technician replied 11 months ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 24,060
Experience: Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
Verified

Hello and welcome to JustAnswer!

P0688 is for the ASD relay circuit and will be related to your no start condition. The ASD relay is what powers the injectors and coils.

This could be the relay itself, a blown fuse, internal failure in the integrated power module, a wiring problem, or possibly the powertrain control module (unlikely). Some electrical testing will be required to determine what is going on.

Can you double check fuse 6 in the power distribution center, a 50a fuse?

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sprinkles08
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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