I recently acquired a 2000 LC with 167k miles. Runs well and in good shape. Seller is a member here and a crook (stevenp). That is a story for another day. But when I purchased the truck and drove it, all was well. When I got it home (100 miles) I discovered issues.
I first noticed that the truck was not going into overdrive. Button and light worked, but no overdrive. First thought was transmission. But when I investigated further, I noticed that the crook removed the dash lights for Trac, Trac off, and ABS. I pulled the codes and found several Trac and ABS codes. I cleared them, did a few system resets, replaced all the dash bulbs (just the fact that some were missing caused error codes).
I am left with a code 68 which is the signal for the L4 selection. I went through the tests described on the FSM and it passed those tests. I decided to go back to basics and did a test of the battery and alternator. Battery is fine, relatively new. Regulator failed, alternator was fine. I replaced the alternator with a reman Denso unit purchased on Amazon. Install went smoothly. Have not had it re-tested. My theory was that a bad regulator could have been triggering the 68 error.
Once cleared the 68 error will come on randomly. Sometimes I can drive 20+ miles before it comes on, other times it comes on immediately. The dash warning lights always reset themselves when shut down and restarted.
As to the OD problem. In the process of reseting all of the ABS and TRAC codes, that problem was fixed. The transmission shifted normally. However, when the ABS/Trac lights were on, the shift points were later.
Current Issue:
I decided to depart for my 3,000 mile trip from TX to Colorado with a lot of off-roading. Idiot lights were the only problem that I was experiencing and the OD was working normally. 28 miles from home and from resetting all of the codes, the ABS/Trac lights came on - no surprise. Then a couple of miles later, the OD stopped working. Hmm, there is a connection here. I turned around and parked it. Took another car to Colorado.
Here is what I think is happening: There is an issue with the Trac/abs computer, L4 switch, and/or wires to and from those units. It causes the transmission to think it is in L4 causing the later shifts, and the inoperability of the OD. If I am not mistaken, OD is not available if you are in L4.
While on vacation, I am trying to determine my next steps. Any recommendations? Seen this before? Sympathy? I will update this thread as time goes by. But I won't be home with the truck for a couple of weeks.
I first noticed that the truck was not going into overdrive. Button and light worked, but no overdrive. First thought was transmission. But when I investigated further, I noticed that the crook removed the dash lights for Trac, Trac off, and ABS. I pulled the codes and found several Trac and ABS codes. I cleared them, did a few system resets, replaced all the dash bulbs (just the fact that some were missing caused error codes).
I am left with a code 68 which is the signal for the L4 selection. I went through the tests described on the FSM and it passed those tests. I decided to go back to basics and did a test of the battery and alternator. Battery is fine, relatively new. Regulator failed, alternator was fine. I replaced the alternator with a reman Denso unit purchased on Amazon. Install went smoothly. Have not had it re-tested. My theory was that a bad regulator could have been triggering the 68 error.
Once cleared the 68 error will come on randomly. Sometimes I can drive 20+ miles before it comes on, other times it comes on immediately. The dash warning lights always reset themselves when shut down and restarted.
As to the OD problem. In the process of reseting all of the ABS and TRAC codes, that problem was fixed. The transmission shifted normally. However, when the ABS/Trac lights were on, the shift points were later.
Current Issue:
I decided to depart for my 3,000 mile trip from TX to Colorado with a lot of off-roading. Idiot lights were the only problem that I was experiencing and the OD was working normally. 28 miles from home and from resetting all of the codes, the ABS/Trac lights came on - no surprise. Then a couple of miles later, the OD stopped working. Hmm, there is a connection here. I turned around and parked it. Took another car to Colorado.
Here is what I think is happening: There is an issue with the Trac/abs computer, L4 switch, and/or wires to and from those units. It causes the transmission to think it is in L4 causing the later shifts, and the inoperability of the OD. If I am not mistaken, OD is not available if you are in L4.
While on vacation, I am trying to determine my next steps. Any recommendations? Seen this before? Sympathy? I will update this thread as time goes by. But I won't be home with the truck for a couple of weeks.
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