Transmission "Do Not Shift" Light and Code 22 (Speed Sensor)
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09-17-2007, 15:54
Post: #11
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Transmission "Do Not Shift" Light and Code 22 (Speed Sensor)
Leroy, I do not have any drawings of the TCM wiring or functions. I
focused on the speed sensor based on the transmission code being flashed (22). Apparently the transmission is designed to "shut down" and prevent shifting if it is not getting a signal from the speed sensor. I first unplugged the sensor altogether and noted that there was no change in symptoms. I then called an Allison shop to inquire how to check the sensor. When I determined that it was showing a satisfactory ohm reading, I then started rechecking the nearest connections first and cleaning them regardless of how I though they looked. My plan was to trace the wiring all the way back to the TCM/ECM and check any conection I found along the way. Lucked out that it was the first one even though it "looked" okay. I keep my coach stored indoors, connected to shorepower at all times and use it frequently. Even so, I guess time is not on our side in terms of the age of some of the electrical connections. Hope this helps. David Hanvy 89WB Crosby, TX --- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert" > > Thanks for the report. Happy it was something simple. > One question. What prompted you to zero in on the speed sensor? Do you have a drawing of the TCM wiring and functions? If the bus is not moving how does the speed sensor affect the shifter pad, if you know? Just for future reference. I would like to know more since I do not have a manual or drawing on my TCM. Thanks > Leroy Eckert > 1990 WB-40"Smoke N Mirrors > Niceville, FL > Royale Conversion > ----- Original Message ----- > From: David Hanvy > To: WanderlodgeForum@yahoogroups.com > Sent: Friday, September 14, 2007 1:09 PM > Subject: [WanderlodgeForum] Re: Transmission "Do Not Shift" Light and Code 22 (Speed Sensor) > > > Leroy/Kevin, > Thanks for your replies. I started the engine from the rear remote > and the transmission warning light/do not shift remains on. No change > when I switched back to the front either. Additionally, I > disconnected from shore power and disconnected the ground cable on > the battery bank in an effort to reset the tranny. No luck on that > either. (do not shift equals WILL not shift) I plan to to locate and > read up on the Speed Sensor as a next step. > All input is appreciated. David Hanvy 89WB PT40 Crosby, TX > > --- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert" > > > > > Although I don't think your bus would start if the remote rear > start switch was acting up, mine will give me a do not shift light in > the rear start position and in the front position if it is not > engaged properly. Not all coaches are wired to give a do not shift > light on the remote rear start position but mine does. I have never > checked my codes so can't help there. I would cycle that switch to > rear, off, and back to front, restart and see what happens.. It is a > long shot but easy to do. > > Let us know what you find for future reference. > > Leroy Eckert > > 1990 WB-40"Smoke N Mirrors" > > Niceville, FL > > Royale Conversion > > ----- Original Message ----- > > From: David Hanvy > > To: WanderlodgeForum@yahoogroups.com > > Sent: Thursday, September 13, 2007 8:48 PM > > Subject: [WanderlodgeForum] Transmission "Do Not Shift" Light and > Code 22 (Speed Sensor) > > > > > > Greetings All; I started my coach today which has been sitting in > > covered storage with shore power for about two weeks. The > > transmission "Do Not Shift" light and check transmission light > are > > staying on. It flashes a Code 22 which indicates a Speed Sensor > issue. > > Does anyone have any experience with this issue? I did not note > any > > transmission problems on my last trip which was about two weeks > ago. I > > cleaned the ground strap connections on the transmission and > frame and > > checked the transmission cannon plug but the warning lights > remain on. > > Thanks. David Hanvy 89WB PT40 Crosby, TX > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > [Non-text portions of this message have been removed] > |
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09-18-2007, 00:58
Post: #12
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Transmission "Do Not Shift" Light and Code 22 (Speed Sensor)
I now remember that code 22 in the original post. Apparently it is a loop that
allows everything to communicate. I was wondering if cleaning those plugs might be a possible PM item to prevent such occurrences?? Time is not on our side when it comes to electrical connections. On the other hand, if isn't broken, I wonder about messing with it. Mess up and cause more problems. Thanks for the information. Leroy Eckert 1990 WB-40"Smoke N Mirrors" Niceville, FL Royale Conversion ----- Original Message ----- From: David Hanvy To: WanderlodgeForum@yahoogroups.com Sent: Monday, September 17, 2007 10:54 PM Subject: [WanderlodgeForum] Re: Transmission "Do Not Shift" Light and Code 22 (Speed Sensor) Leroy, I do not have any drawings of the TCM wiring or functions. I focused on the speed sensor based on the transmission code being flashed (22). Apparently the transmission is designed to "shut down" and prevent shifting if it is not getting a signal from the speed sensor. I first unplugged the sensor altogether and noted that there was no change in symptoms. I then called an Allison shop to inquire how to check the sensor. When I determined that it was showing a satisfactory ohm reading, I then started rechecking the nearest connections first and cleaning them regardless of how I though they looked. My plan was to trace the wiring all the way back to the TCM/ECM and check any conection I found along the way. Lucked out that it was the first one even though it "looked" okay. I keep my coach stored indoors, connected to shorepower at all times and use it frequently. Even so, I guess time is not on our side in terms of the age of some of the electrical connections. Hope this helps. David Hanvy 89WB Crosby, TX --- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert" > > Thanks for the report. Happy it was something simple. > One question. What prompted you to zero in on the speed sensor? Do you have a drawing of the TCM wiring and functions? If the bus is not moving how does the speed sensor affect the shifter pad, if you know? Just for future reference. I would like to know more since I do not have a manual or drawing on my TCM. Thanks > Leroy Eckert > 1990 WB-40"Smoke N Mirrors > Niceville, FL > Royale Conversion > ----- Original Message ----- > From: David Hanvy > To: WanderlodgeForum@yahoogroups.com > Sent: Friday, September 14, 2007 1:09 PM > Subject: [WanderlodgeForum] Re: Transmission "Do Not Shift" Light and Code 22 (Speed Sensor) > > > Leroy/Kevin, > Thanks for your replies. I started the engine from the rear remote > and the transmission warning light/do not shift remains on. No change > when I switched back to the front either. Additionally, I > disconnected from shore power and disconnected the ground cable on > the battery bank in an effort to reset the tranny. No luck on that > either. (do not shift equals WILL not shift) I plan to to locate and > read up on the Speed Sensor as a next step. > All input is appreciated. David Hanvy 89WB PT40 Crosby, TX > > --- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert" > > > > > Although I don't think your bus would start if the remote rear > start switch was acting up, mine will give me a do not shift light in > the rear start position and in the front position if it is not > engaged properly. Not all coaches are wired to give a do not shift > light on the remote rear start position but mine does. I have never > checked my codes so can't help there. I would cycle that switch to > rear, off, and back to front, restart and see what happens.. It is a > long shot but easy to do. > > Let us know what you find for future reference. > > Leroy Eckert > > 1990 WB-40"Smoke N Mirrors" > > Niceville, FL > > Royale Conversion > > ----- Original Message ----- > > From: David Hanvy > > To: WanderlodgeForum@yahoogroups.com > > Sent: Thursday, September 13, 2007 8:48 PM > > Subject: [WanderlodgeForum] Transmission "Do Not Shift" Light and > Code 22 (Speed Sensor) > > > > > > Greetings All; I started my coach today which has been sitting in > > covered storage with shore power for about two weeks. The > > transmission "Do Not Shift" light and check transmission light > are > > staying on. It flashes a Code 22 which indicates a Speed Sensor > issue. > > Does anyone have any experience with this issue? I did not note > any > > transmission problems on my last trip which was about two weeks > ago. I > > cleaned the ground strap connections on the transmission and > frame and > > checked the transmission cannon plug but the warning lights > remain on. > > Thanks. David Hanvy 89WB PT40 Crosby, TX > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > [Non-text portions of this message have been removed] > [Non-text portions of this message have been removed] |
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