[Reseburg]

Hello,

We recently purchased a 2014 with 110k on it. Once in a great while it goes into the reduced engine power mode. The last time it did it, I noticed that the volt gauge will start going down beforehand. Even as low as 11-12 volts. The only legit code I have is a P1682. The others I'm pretty sure are from driving in the reduced engine power mode. I have tested the power train and crank relays which from what I can tell control those circuits. I can monitor both voltage circuits going to the PCM on my scantool. The problem is this issue happens so rarely that I have yet been able to troubleshoot it while its happening. It may only happen once a month. If I could duplicate the issue, I would be able to troubleshoot it no problem. I'm not about to take it to the dealership and let their parts changers just throw my money it. I can do that at home. Does anyone have experience with P1682 specifically on the Traverse platform? I know that the reduced engine power mode can be caused by a million things. I'm looking for feedback on P1682 Ignition 1 Switch circuit 2 code mostly. If your car had this issue and it was resolved permanently, please share. I'm curious if there is common problems that cause this. So I have an area to start looking for voltage drops, corroded connections, etc. Thanks in advance!

 

[whipster]

Here's some info for you I found on that code. I see two techs had done something to or replaced the underhood fuse box. You may be able to test this with a DVOM and wiring diagram. I hope some of this helps.


Vehicle Application: 2014 Traverse 3.6



Customer Concern: Very intermittent stall or reduced power. Codes P0689, P1682. P1682 only came back. May not be able to replicate problem. Average Reported Mileage: 58162 Tests/Procedures: 1. Inspect wiring for damage from the underhood fuse block to the Electronic Control Module (ECM).

2. Swap the Engine Controls Ignition Relay with another relay.

3. Clean ground G110. This is the ECM ground.

4. Disconnect, inspect and reconnect all connectors on the circuit. Tech Tips: G110, right rear of engine mounted to the rear cylinder head.

Code P1682 - The ECM detects that there is more than 3 V difference between the ignition main relay signal and the engine controls ignition relay signal circuits for less than 1 sec.

 

[Reseburg]

Here's some info for you I found on that code. I see two techs had done something to or replaced the underhood fuse box. You may be able to test this with a DVOM and wiring diagram. I hope some of this helps.


Vehicle Application: 2014 Traverse 3.6



Customer Concern: Very intermittent stall or reduced power. Codes P0689, P1682. P1682 only came back. May not be able to replicate problem. Average Reported Mileage: 58162 Tests/Procedures: 1. Inspect wiring for damage from the underhood fuse block to the Electronic Control Module (ECM).

2. Swap the Engine Controls Ignition Relay with another relay.

3. Clean ground G110. This is the ECM ground.

4. Disconnect, inspect and reconnect all connectors on the circuit. Tech Tips: G110, right rear of engine mounted to the rear cylinder head.

Code P1682 - The ECM detects that there is more than 3 V difference between the ignition main relay signal and the engine controls ignition relay signal circuits for less than 1 sec.

Thanks! Out of curiosity, where did you find this information?

You know.... when I was checking the control circuits for the relays at the fuse block? I think it was terminal 87 for the crank relay, at one point I had 3 volts on that terminal. That struck me as very weird. I pulled the fuse block out to check the connections on the bottom. Everything was clean and dry. I wonder if there is some corrosion that is causing shorting inside that thing. I'm temped to replace the fuse block so i can dissect the old one.

I did a visual inspection of the wiring between the fuse block and the ECM. That all looked good. Again just a visual inspection.

I will check the ground connection for sure.

 

[whipster]

Thanks! Out of curiosity, where did you find this information?

You know.... when I was checking the control circuits for the relays at the fuse block? I think it was terminal 87 for the crank relay, at one point I had 3 volts on that terminal. That struck me as very weird. I pulled the fuse block out to check the connections on the bottom. Everything was clean and dry. I wonder if there is some corrosion that is causing shorting inside that thing. I'm temped to replace the fuse block so i can dissect the old one.

I did a visual inspection of the wiring between the fuse block and the ECM. That all looked good. Again just a visual inspection.

I will check the ground connection for sure.

In the shop we subscribe to Identifix which techs from all over subscribe to and report fixes. It's much better than Mitchels/pro demand. I can just punch in a code and see what others are doing to fix them. It's great to help with direction which we need all we can get now a days.

 

[Reseburg]

Nice! Thank you for the information! Based on the weird voltage readings I saw in the fuse block I think I'm going to start there. I found a new GM one on ebay for $100. Once I get it changed out and know everything works, I will bust the old one open and have a look inside. I will let you know what I find.

 

[greentraverse]

Make sure you get the right fuse block.

Prior to 2012, there were two versions. One had the V92 towing fuses and relays wired in and one did not. If you bought the factory tow package, you got the wired one. If you didn't buy the factory tow package, you got the unwired one.

2012 and later, all fuse blocks have the V92 fuses and relays wired in (but won't have the towing fuses/relays installed unless you bought the factory tow package).

 

[David O'Quin]

I have the same issue with a 2013 Traverse. About 96xxx miles. Did you ever fix the problem?

Thanks

 

[cgostola]

I have the same issues replacing relays and cleaning ground didn't work for me

 

[cgostola]

I replaced the fuse block a month ago and haven't had any more P1682 issues so far.

 

[jonrandolph014]

Does anyone have part # for Fuse Box under hood 2014 model w/0 towing package ! Girl friend drives a tractor-trailer and purchase it in January so she is broken heart up in New York . I would love to have it on the road when she gets in ! Thanks from Jon in Tennessee

 

[greentraverse]

I don't believe you can buy a new one w/o tow package anymore. But that's OK. The tow package version will just come with the extra tow fuses and relays. You can take them out or leave them in; doesn't matter.

2013-2014 Chevrolet Traverse Accessory Wiring Junction Block 22933347 | GMPartsDirect.com

2013-2014 Chevrolet Traverse part # 22933347 - Accessory Wiring Junction Block

www.gmpartsdirect.com

 

[roosavonta]

Hello, We recently purchased a 2014 with 110k on it. Once in a great while it goes into the reduced engine power mode. The last time it did it, I noticed that the volt gauge will start going down beforehand. Even as low as 11-12 volts. The only legit code I have is a P1682. The others I'm pretty sure are from driving in the reduced engine power mode. I have tested the power train and crank relays which from what I can tell control those circuits. I can monitor both voltage circuits going to the PCM on my scantool. The problem is this issue happens so rarely that I have yet been able to troubleshoot it while its happening. It may only happen once a month. If I could duplicate the issue, I would be able to troubleshoot it no problem. I'm not about to take it to the dealership and let their parts changers just throw my money it. I can do that at home. Does anyone have experience with P1682 specifically on the Traverse platform? I know that the reduced engine power mode can be caused by a million things. I'm looking for feedback on P1682 Ignition 1 Switch circuit 2 code mostly. If your car had this issue and it was resolved permanently, please share. I'm curious if there is common problems that cause this. So I have an area to start looking for voltage drops, corroded connections, etc. Thanks in advance!

Had the same problem took it to a shop and fuse box under the hood was not long enough to have it fit snug. At first thought the screws were bad but the just weren’t long enough. The mechanic put longer screws in the box and let the battery charge over night and ran it with no problems. When I crank the car up it sounded kind of weak so I went to auto zone and tested the battery and it was down to 65 percent even after charging all night. Didn’t want to buy another battery because the test said the battery was good at 65 percent but I did any way. The new battery worked wonders car sound nice and strong. Now I believe the box screws and a low battery might have been the problem. Drove it over 80miles since no problem yet.