VATS issue - need help
Melting Slicks
Joined: Sep 2008
Posts: 3,138
Likes: 802
From: Espanola New Mexico
Never heard about a VATS bypass module? Most people simply soulder some resistors at the BCM connector after cutting the two wires from the Ignition switch. Simply measure your car keys resistor pellet and purchase two resistors to match the resistance value of the key pellet.
Melting Slicks
Joined: Sep 2008
Posts: 3,138
Likes: 802
From: Espanola New Mexico
The module is the easy way of bypassing VATS, can you hear the TDR click on when you turn the key to the start position of the Ignition switch? The TDR is located under the
passenger footwell area behind the toe board and above the BCM, it is the relay that sends power to energize the starter.
passenger footwell area behind the toe board and above the BCM, it is the relay that sends power to energize the starter.
Melting Slicks
Joined: Sep 2008
Posts: 3,138
Likes: 802
From: Espanola New Mexico
Sounds about right, so it seems that the TDR is being energized, the TDR has four wires, a red, violet, two yellow wires one of which a black strip. The red should have 12v all the time regardless of Ignition switch position even if the key is not inserted. The violet wire should have 12v when the switch is held in the start position, and it is the wire that connects to the starter solenoid. A simple test is to use a simple wire jumper and insert it between the red and violet wires at the TDR socket, make absolutely certain that the car is in neutral, this test will determine if the starter is the cause of the no crank problem. Examine the cables at the starter solenoid insuring they are clean and tight.
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Heel & Toe
Joined: Mar 2025
Posts: 22
Likes: 4
Update
Had my son turn the key while I was using the jumper cable and the car started, this is great news. Now I will find a store that sells the relay and hopefully reply next time with mission accomplished. Really appreciate the help Martinez.
Had my son turn the key while I was using the jumper cable and the car started, this is great news. Now I will find a store that sells the relay and hopefully reply next time with mission accomplished. Really appreciate the help Martinez.
Advanced
Joined: Jan 2023
Posts: 75
Likes: 36
From: near San Antonio TX
Old relay was Omron brand # 12177235 which may or may not be bad? causing an intermittent NO CRANK issue. I took it apart and cleaned up some of its contacts and will keep it for a spare.
Heel & Toe
Joined: Mar 2025
Posts: 22
Likes: 4
I installed a new Standard brand starter relay # RY282 in passenger side footwell.
Old relay was Omron brand # 12177235 which may or may not be bad? causing an intermittent NO CRANK issue. I took it apart and cleaned up some of its contacts and will keep it for a spare.
Old relay was Omron brand # 12177235 which may or may not be bad? causing an intermittent NO CRANK issue. I took it apart and cleaned up some of its contacts and will keep it for a spare.
Heel & Toe
Joined: Mar 2025
Posts: 22
Likes: 4
I tested my ignition switch when I was trying to figure out the problem and it tested good. I installed a bypass module for the VATS, hopefully this new TDR relay will be the end of the intermittent no start problem.