Auto Transmission Shift Lock Not Unlocking
03 Auto GXE 58,500 Miles (yes this post is a long one, sorry)
The problem:
Start car and press the brake in then attempt to shift the auto transmission into gear. The shifter doesn’t move!
Has anybody had this problem before? I have searched and didn’t find anything on this topic. So that is mainly why I am posting this.
I know how to manually unlock it so I can still get around. (For those who don’t know how to do it look in the Owners Manuel) The break lights work so I know the break switch is good. So I pulled out the fsm and start looking around for the A/T shift lock system. I found it and start going threw the troubleshooting steeps. (page AT-251)
Step 1
Check key interlock cable for damage.
-ok not damage
Step 2
Check selector lever position for damage
- ok not damage
Step 3
Check power source at stop light switch
- ok the break lights light up so I am not going to craw under the dash
Step 4
Check input signal @ the “A/T Device” (shifter)
- should be 12vdc when the brake pedal is pressed. wait…. I am getting no power…. But the stop light switch is working………d@m another sentra with wiring problems.
(Going threw the procedures in this step it says you should get 0vdc when you have the pedal depressed and 12 vdc when released BUT looking at the schematics in the fsm you should get 12vdc when you depress the pedal and 0 vdc when released) But in both cases I am not getting any volts dc. I have not checked the resistance on the cable yet because I believe I have to remove the break lights to get a good reading.
That is as far as I am going to go. Why? Because I have extended warranty (not threw Nissan) so it will cover the electrical system and I want to get what I paid for. I have an appointment on Friday @ Nissan to look at this problem and want to see how long it takes them to find it out. It took me about 15 minutes from pulling the book out and reading it to inserting the last trim piece back into place. For me this was an easy problem to find because I am an electrician in the navy. So if I was going to fix it I would run a new wire from the stop switch to the terminal 7 on the “A/T device” If someone down the road has this problem I hope this helps. I’ll post back when the car gets fixed.
03 Auto GXE 58,500 Miles (yes this post is a long one, sorry)
The problem:
Start car and press the brake in then attempt to shift the auto transmission into gear. The shifter doesn’t move!
Has anybody had this problem before? I have searched and didn’t find anything on this topic. So that is mainly why I am posting this.
I know how to manually unlock it so I can still get around. (For those who don’t know how to do it look in the Owners Manuel) The break lights work so I know the break switch is good. So I pulled out the fsm and start looking around for the A/T shift lock system. I found it and start going threw the troubleshooting steeps. (page AT-251)
Step 1
Check key interlock cable for damage.
-ok not damage
Step 2
Check selector lever position for damage
- ok not damage
Step 3
Check power source at stop light switch
- ok the break lights light up so I am not going to craw under the dash
Step 4
Check input signal @ the “A/T Device” (shifter)
- should be 12vdc when the brake pedal is pressed. wait…. I am getting no power…. But the stop light switch is working………d@m another sentra with wiring problems.
(Going threw the procedures in this step it says you should get 0vdc when you have the pedal depressed and 12 vdc when released BUT looking at the schematics in the fsm you should get 12vdc when you depress the pedal and 0 vdc when released) But in both cases I am not getting any volts dc. I have not checked the resistance on the cable yet because I believe I have to remove the break lights to get a good reading.
That is as far as I am going to go. Why? Because I have extended warranty (not threw Nissan) so it will cover the electrical system and I want to get what I paid for. I have an appointment on Friday @ Nissan to look at this problem and want to see how long it takes them to find it out. It took me about 15 minutes from pulling the book out and reading it to inserting the last trim piece back into place. For me this was an easy problem to find because I am an electrician in the navy. So if I was going to fix it I would run a new wire from the stop switch to the terminal 7 on the “A/T device” If someone down the road has this problem I hope this helps. I’ll post back when the car gets fixed.