2002 w/transmission error code
#1
11-30-2008, 09:00 PM
2002 w/transmission error code
Our Mazda Protege is going into fail safe mode, OD off light blinking and tranny in 3rd gear, 100 seconds after shifting into drive. It produces a P0705 error code. The range sensor was changed out twice, the PCM was replaced and the entire harness has been tested for continuity. We have been to two mechanics and a Mazda dealership with no success. The 2nd mechanic went thru the transmission checking every sensor and solenoid. Everyone thinks this is something simple but no one can trace the problem to its source. One additional clue is there is a sharp jolt when shifting into reverse. The mechanic said that was due to drive and reverse signals coming from the range sensor going to the PCM at the same time. He could not find the cause. Although this is a great car otherwise, we are at our wits end and are ready to junk the vehicle. Any ideas would be appreciated.
#2
11-30-2008, 09:11 PM
RE: 2002 w/transmission error code
from what I googled and gathered it is...
P0705 Transmission Range Sensor Circuit malfunction (PRNDL Input)
This has something to do with your clutch? This is causing the problems with shifting.
Also, may or may not be related but my car was doing a similar thing a while back and it was my fuel injectors. They were misfiring and had to be replaced.
It seems like something is misfiring in your car.
Hope that helped a little bit.
P0705 Transmission Range Sensor Circuit malfunction (PRNDL Input)
This has something to do with your clutch? This is causing the problems with shifting.
Also, may or may not be related but my car was doing a similar thing a while back and it was my fuel injectors. They were misfiring and had to be replaced.
It seems like something is misfiring in your car.
Hope that helped a little bit.
#3
10-21-2012, 08:51 AM
Struggling with P0705 code!
I have a 2002 Mazda Protege 5 that is throwing P0705 code. It is a nice car but the mechanics are struggling with this one. They have already replaced the TR range switch and it still throws the code.
I would like to get it fixed but I cannot afford to keep throwing money at mechanics to keep guessing. I have seen several threads with this issue but they seem to end without a resolution.
I would like to get it fixed but I cannot afford to keep throwing money at mechanics to keep guessing. I have seen several threads with this issue but they seem to end without a resolution.
#4
10-21-2012, 09:41 AM
FOUND THIS:
but I had the same code on my '00 protege. turned out to be a unplugged connector, going to the (manual) transmission. the connector was just visible from above on the transmission side, pretty far down in there. plugged it back in, and two trips later the light went out.
other possibility it's a bad clutch switch. the ECU flags the code if it doesn't see the clutch engage/disengage when it thinks it should.
funny thing is the previous owner had taken this car to a dealer, to a "foreign car specialist", and an independent shop, none of which figured out the problem. I got a significant discount on the car because he was convinced it needed a new ECU at about $500. FROM: 1999 Mazda Protege LX - P0705 : OBD-Codes.com
Another little Pet Peeve of mine is poor grounding. I believe with every car you should run some extra grounds. Run an extra ground wire from the Negative Terminal of the Battery to the following places: Transmission, engine block, and another one to the body.
When they were checking continuity they may have been checking by grounding to the transmission, but who's to say it goes back to rest of car like ECU.
but I had the same code on my '00 protege. turned out to be a unplugged connector, going to the (manual) transmission. the connector was just visible from above on the transmission side, pretty far down in there. plugged it back in, and two trips later the light went out.
other possibility it's a bad clutch switch. the ECU flags the code if it doesn't see the clutch engage/disengage when it thinks it should.
funny thing is the previous owner had taken this car to a dealer, to a "foreign car specialist", and an independent shop, none of which figured out the problem. I got a significant discount on the car because he was convinced it needed a new ECU at about $500. FROM: 1999 Mazda Protege LX - P0705 : OBD-Codes.com
Another little Pet Peeve of mine is poor grounding. I believe with every car you should run some extra grounds. Run an extra ground wire from the Negative Terminal of the Battery to the following places: Transmission, engine block, and another one to the body.
When they were checking continuity they may have been checking by grounding to the transmission, but who's to say it goes back to rest of car like ECU.
#6
10-22-2012, 03:15 PM
Well if you have two broken mounts get those fixed! You probably only have one mount left and its not going to work very well at all since its the only one holding anything now.
#7
10-22-2012, 05:27 PM
2002Betty:
Get the engine mounts replaced. MazdaTirol is right. If the 3rd one brakes -and it will- you have to call the wrecker.
So the TR sensor has been replaced, but maybe the wiring between it and the computer may be faulty. I would disconnect and reconnect, test for continuity and also make sure that the ground connections of the engine and transmission to the body are A-O.K.
Wiggling the harness while testing it could reveal and bad wire or solder spot.
Electrical faults are hard to track down. So you need to be patient and find an understanding mechanic or car electrician.
Get the engine mounts replaced. MazdaTirol is right. If the 3rd one brakes -and it will- you have to call the wrecker.
So the TR sensor has been replaced, but maybe the wiring between it and the computer may be faulty. I would disconnect and reconnect, test for continuity and also make sure that the ground connections of the engine and transmission to the body are A-O.K.
Wiggling the harness while testing it could reveal and bad wire or solder spot.
Electrical faults are hard to track down. So you need to be patient and find an understanding mechanic or car electrician.
#8
11-18-2012, 08:08 AM
Update November 18, 2012
The TR range switch was replaced again by the mechanic (under warranty). He also replaced the 2 broken engine mounts. The car also started throwing a P0302 code (cylinder 2 misfire) caused by a bad ignition coil (also replaced). The car ran better but still threw the P0705 code again on the way home from the shop.
The shop did check the ground wire and said it check out good.
It seems that the only thing left is that wiring harness several folks have mentioned. I looked at it and it leads into another set and then another set of wires. Changing that seems like a HUGE job. Is there another harness that needs to be replaced?
(FYI - I also broke the Mass Airflow Sensor when I took it out to clean it. Turns out even a gentle brush with a Q-tip will break the center sensor! Ouch. That is not a cheap part to replace!)
The TR range switch was replaced again by the mechanic (under warranty). He also replaced the 2 broken engine mounts. The car also started throwing a P0302 code (cylinder 2 misfire) caused by a bad ignition coil (also replaced). The car ran better but still threw the P0705 code again on the way home from the shop.
The shop did check the ground wire and said it check out good.
It seems that the only thing left is that wiring harness several folks have mentioned. I looked at it and it leads into another set and then another set of wires. Changing that seems like a HUGE job. Is there another harness that needs to be replaced?
(FYI - I also broke the Mass Airflow Sensor when I took it out to clean it. Turns out even a gentle brush with a Q-tip will break the center sensor! Ouch. That is not a cheap part to replace!)
#9
11-19-2012, 11:17 AM
Update November 18, 2012
It seems that the only thing left is that wiring harness several folks have mentioned. I looked at it and it leads into another set and then another set of wires. Changing that seems like a HUGE job. Is there another harness that needs to be replaced?
It certainly is a big job. This harness transmitts the signals from the sensors to the ECM. You could first check for continuity of the individual wires from the sensor to the ECM. If continuity checks out than the ECM itself may carry the fault.
Alternately, you could replace the ECM with a known good one. If the code comes up again the fault must be in the harness.
(FYI - I also broke the Mass Airflow Sensor when I took it out to clean it. Turns out even a gentle brush with a Q-tip will break the center sensor! Ouch. That is not a cheap part to replace!)
It seems that the only thing left is that wiring harness several folks have mentioned. I looked at it and it leads into another set and then another set of wires. Changing that seems like a HUGE job. Is there another harness that needs to be replaced?
It certainly is a big job. This harness transmitts the signals from the sensors to the ECM. You could first check for continuity of the individual wires from the sensor to the ECM. If continuity checks out than the ECM itself may carry the fault.
Alternately, you could replace the ECM with a known good one. If the code comes up again the fault must be in the harness.
(FYI - I also broke the Mass Airflow Sensor when I took it out to clean it. Turns out even a gentle brush with a Q-tip will break the center sensor! Ouch. That is not a cheap part to replace!)
Last edited by tanprotege; 11-19-2012 at 11:28 AM.
#10
11-01-2013, 10:52 PM
My 2000 Protégé has the same P0705 error. UseYourNoggin, where was your unconnected unplugged connector located - mine is manual (5 speed) too? Then where did it need to be connected to?
I replaced the neutral switch. Cannot even find the Transmission Range (TR) Sensor & there is little to nothing in the repair guide for anything but an automatic.
Driving me nuts!!! Any information anyone can provide would be appreciated with regard to this error & the TR sensor on a manual (5 speed) transmission.
I replaced the neutral switch. Cannot even find the Transmission Range (TR) Sensor & there is little to nothing in the repair guide for anything but an automatic.
Driving me nuts!!! Any information anyone can provide would be appreciated with regard to this error & the TR sensor on a manual (5 speed) transmission.