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Hello, im having issues qith my honda accord 2002 v6 auto, simpthoms, when car first turn on 2nd gear wont engage if d2 is selected or if it tries to change into 2nd while in D3 or D4, no slipping, just feels like nothing is there, harsh shifting/ angagement from d2 to d1, d2 to D3 or D4, after a while it will go in safe mode, D4 starts flashing, and to drive it i have to select d2/d1 to advance and to gain speed i select D3/D4, can can go up to 120km/h, i downloaded the troubleshooting manual for the honda 6th gen v6 automatic (http://www.gvrdeu.org/Honda%20FSM/Accord/1998-2002%20Accord%20FSM/1998-2001%20Honda%20Accord%20V-6%20SM%20Supp.pdf), using that i tested the range switch signals and all came good, so i checked the signlas going to the shift solenoids, and i found that the shift solenoid A is not getting the correct signals. I attached an excell sheet with the values i got from the PCM. The shift solenoid A is not geting the signals when they supposed to, the solenoid itself is good, is the signals that are not correct, and with that on page 360 of the document, it shows the simpthoms of my accord, the car moves in D4, D3, R, 1 but not in 2. and their explanation says shift solenoid A may be bad, well yea if the signal getting to the solenoid are not correct then it wont shift correctly, so how can i fix this? can i just take it to the dealership to get my PCM reprogramed? and more info, on the dealership they helped me checked it and scaned it and got some data from the car while moving and found that secong gear pressure switch only send signal for a moment if the car went WOT. any help is apreciated, i really dont want to sell the car, if it gets fixed i want to add a transmission cooler and an external filter, i do not use it for racing what so ever i only use it to travel to school with the round trip is 74km per day. Thank you for anyone who can help me.
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If the signal is not there Then I would check wiring back the source of the signal point.
If signal is found correct wiring. If no signal found pcm/tcm problem.the signa is there, i opened the pcm and traced the transistor to check if it was the cause of the problem but the signal it gets its incorrect, example, in the neutral position, solenoid A must remain off, but in my pcm the processor sends an, on signal for 5-6 seconds then off, its also sending delayed signals to solenoid C. now can i just get the pcm to be reprogramed? or do i need it to replace it? because with what i found it doesnt seem to be a hardwaere issue, but a software issue. about 3 months ago i got it scanned at bosch, and when put on neutral it showed reverse if im not mistaken, on the scanner. as far as i know there isnt much in that can cause this to happen, if a sensor was bad then it would have been detected at the dealership or7
when all the sensors and actuators of the transmission were changed tested.[quote=”luis77″ post=155602]the signa is there, i opened the pcm and traced the transistor to check if it was the cause of the problem but the signal it gets its incorrect, example, in the neutral position, solenoid A must remain off, but in my pcm the processor sends an, on signal for 5-6 seconds then off, its also sending delayed signals to solenoid C. now can i just get the pcm to be reprogramed? or do i need it to replace it? because with what i found it doesnt seem to be a hardwaere issue, but a software issue. about 3 months ago i got it scanned at bosch, and when put on neutral it showed reverse if im not mistaken, on the scanner. as far as i know there isnt much in that can cause this to happen, if a sensor was bad then it would have been detected at the dealership or7
when all the sensors and actuators of the transmission were changed tested.[/quote]If the pcm is sending the wrong signal to the wrong device it sounds like something
is wired wrong or backwards. Are the sensors in the right spots? Did this happen after
these sensor and actuators were tested and or replaced?after the transmission was rebuilt the transmission shop kept the car for more time as they were test changing solenoids, and in the dealership i was told that the 2nd gear pressure switch wasnt activating, , i got the thransmission shop to swap places of the 2nd and 3rd gear pressure switch as they are the same part, after that i did a continuity test of all electronics that are on the transmission with eception of the range switch, then i compared the location and wire color to the manual i found and all is correct, i tested the transmission range switch and all is where it supposed to be with its corresponding voltages
what else could make the pcm send wrong signasl? there sint much on the transmission, there are 2 pressure switches but for them to activate the solenoids need to work apropietly first, then there is the countershaft and mainshaft speed sensor, but the car was static during all testing, and doesnt matter if its static or moving, it does the same thing, the reange switch is sending correct signals to the correct wires, so as far as i know everythong thats on the transmission is wired correctly and has good continuity and sends correct signals to the PCM, but is the PCM thats not sending signals apropietly.
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