V8Man
Member
I am having an absolutely unsolvable problem with my 2004 Supercharged V8 Sport. It started when a borrowed a trailer from work. After pulling it 45 miles I put my truck into reverse and everything started happening! Lights, buzzers, just chaos. I unplugged the trailer everything seemed fine except the zero point calibration skid control lights were on (VSC & ABS). I plugged in my code reader and it showed no codes. Apparently the back-up lights shorted from my plug to the trailer, no fuses blown.
Since I was on the sloped driveway, I opted to drive back in the morning with the trailer unplugged without doing the zero point calibration. After the uneventful trip back, I dropped off the trailer and parked. At noon I left for lunch and truck started fine. When I returned from lunch the truck wouldn’t start. With the key on, everything seemed fine. In the start position, nothing clicked, nothing happened. I called a coworker who brought a jump box, the truck started. I drove to the fleet shop, to check the battery or charge it. Turned it off, then tried to start and nothing happened just like before. Put the jumper on it, nothing.
I plugged in the code reader. No codes. No check engine light. The only thing showing were the skid control lights on the dash. Even though the code reader showed no codes, I cleared the codes and the truck started! I repeated the stop/start sequence a few times and everything was working except the battery charge light was now illuminated. I returned the next day with my extra relays and fuses. Checked everything, no bad anything. The alternator showed it was working by putting out 13.9 volts. I drove home and used the truck the next couple of weekends and everything was working, except the battery light was on.
I have an extra alternator. I removed the original one and took them both to have them tested. The original tested bad, the extra one tested good. Battery tests good too. Installed the extra one, the battery light stayed on! Re-tested the original and it tested good, damn O’Reilly’s. I tried to do the zero point calibration and it wouldn’t reset. I’ve had trouble with this before so I left it for another day.
So while I was scratching my head on the charging light, I continued driving it around until this weekend with the alternator still putting out 13.9 volts. Three times the truck would not start. Turn the key nothing. All three times the code reader shows no codes, but after clearing codes it starts first time.
What I have deduced for the charge light, that either the diode in the charging light circuit in the instrument panel is out or the body B4 ECU is faulty.
The no start no code can only be from the engine ECM. I have researched this and found that other Toyotas have had similar problems resulted while backing a trailer. But no one has a solution. Remember. I replaced all the affected relays. Checked or replaced every fuse that deals with gauges, trailers, brakes.
Any Ideas?
Since I was on the sloped driveway, I opted to drive back in the morning with the trailer unplugged without doing the zero point calibration. After the uneventful trip back, I dropped off the trailer and parked. At noon I left for lunch and truck started fine. When I returned from lunch the truck wouldn’t start. With the key on, everything seemed fine. In the start position, nothing clicked, nothing happened. I called a coworker who brought a jump box, the truck started. I drove to the fleet shop, to check the battery or charge it. Turned it off, then tried to start and nothing happened just like before. Put the jumper on it, nothing.
I plugged in the code reader. No codes. No check engine light. The only thing showing were the skid control lights on the dash. Even though the code reader showed no codes, I cleared the codes and the truck started! I repeated the stop/start sequence a few times and everything was working except the battery charge light was now illuminated. I returned the next day with my extra relays and fuses. Checked everything, no bad anything. The alternator showed it was working by putting out 13.9 volts. I drove home and used the truck the next couple of weekends and everything was working, except the battery light was on.
I have an extra alternator. I removed the original one and took them both to have them tested. The original tested bad, the extra one tested good. Battery tests good too. Installed the extra one, the battery light stayed on! Re-tested the original and it tested good, damn O’Reilly’s. I tried to do the zero point calibration and it wouldn’t reset. I’ve had trouble with this before so I left it for another day.
So while I was scratching my head on the charging light, I continued driving it around until this weekend with the alternator still putting out 13.9 volts. Three times the truck would not start. Turn the key nothing. All three times the code reader shows no codes, but after clearing codes it starts first time.
What I have deduced for the charge light, that either the diode in the charging light circuit in the instrument panel is out or the body B4 ECU is faulty.
The no start no code can only be from the engine ECM. I have researched this and found that other Toyotas have had similar problems resulted while backing a trailer. But no one has a solution. Remember. I replaced all the affected relays. Checked or replaced every fuse that deals with gauges, trailers, brakes.
Any Ideas?
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