Hello all,
I have never posted before, so any help would be greatly appreciated. I'll post the TLDR in the first paragraph, and the subsequent paragraphs will be the full detail if anyone wants to know the entire story.
I have a 2001 LC, all brake warning lights came on one day. The dealer gave me a print out of all the trouble codes, and they were kind enough to give me the part numbers of which parts they were going to replace. I ordered a new Master Cylinder assembly (part # 47050-60042). I have installed that unit according to the instruction manuals from techinfo.toyota.com, including bleeding the master cylinder and all four calipers, and now I still have two error codes (since the event I got my hands on Toyota Techstream):
C0226: Open or short circuit in hydraulic brake booster solenoid circuit
C1223: ABS Control system malfunciton
The vehicle drives completely normally now, except for the warning lights on the dash (ABS, VSC, and BRAKE warning lights), which makes me very hesitant to drive. I'm worried at any point the accumulator will lose pressure and I will lose braking power.
I am genuinely confused. The C0226 code was not one of the codes present before the new assembly, the C1223 code was present before. My first thought was that I hooked back up the ABS ECU incorrectly, but upon inspection, all of the cable connections have grooves that only allow for one permutation of connection.
There was one symptom that was immediately present during installation. The toyota tech documents instruct to depress the pedal 40 times, then turn the car on and see how long the pump for the accumulator ran for (spec is 30-40 seconds). My pump for the accumulator would run for 3 seconds and shut off, then run again for 3 seconds, and this would continue indefinitely. After extensive bleeding of the master cylinder, now the pump runs for 5 seconds, shuts off, runs again for 25 seconds, and then is done. This always takes exactly 32 seconds, so technically I am within spec, but nobody else I have read mentions their pump cutting off intermittently. Also, the pump will turn back on if I depress the brake pedal twice. I am under the impression that the accumulator should hold pressure for more than two pumps of the pedal?
I have tried using techstream to test the SFR circuit, but every test I run fails before execution as if it cannot communicate correctly with the ABS ECU.
I know that it is not their responsibility, but I gave it a shot and called McGeorge Toyota Parts (I purchased the assembly from them) and asked if they knew of any extra procedures, and all they offered was that I had to bleed the system first.
The odds that a brand new assembly is faulty seems very low to me. So either I installed something incorrectly or there are more problems such as the ABS sensors at the wheel. The installation is pretty straight forward though: four bolts inside the firewall, pin on the brake pedal, reattach brake lines, reconnect pins to ABS ECU, bleed system. Am I missing anything?
Apologies for the long message, many thanks to anybody who gave a read and are willing to give advice.
I have never posted before, so any help would be greatly appreciated. I'll post the TLDR in the first paragraph, and the subsequent paragraphs will be the full detail if anyone wants to know the entire story.
I have a 2001 LC, all brake warning lights came on one day. The dealer gave me a print out of all the trouble codes, and they were kind enough to give me the part numbers of which parts they were going to replace. I ordered a new Master Cylinder assembly (part # 47050-60042). I have installed that unit according to the instruction manuals from techinfo.toyota.com, including bleeding the master cylinder and all four calipers, and now I still have two error codes (since the event I got my hands on Toyota Techstream):
C0226: Open or short circuit in hydraulic brake booster solenoid circuit
C1223: ABS Control system malfunciton
The vehicle drives completely normally now, except for the warning lights on the dash (ABS, VSC, and BRAKE warning lights), which makes me very hesitant to drive. I'm worried at any point the accumulator will lose pressure and I will lose braking power.
I am genuinely confused. The C0226 code was not one of the codes present before the new assembly, the C1223 code was present before. My first thought was that I hooked back up the ABS ECU incorrectly, but upon inspection, all of the cable connections have grooves that only allow for one permutation of connection.
There was one symptom that was immediately present during installation. The toyota tech documents instruct to depress the pedal 40 times, then turn the car on and see how long the pump for the accumulator ran for (spec is 30-40 seconds). My pump for the accumulator would run for 3 seconds and shut off, then run again for 3 seconds, and this would continue indefinitely. After extensive bleeding of the master cylinder, now the pump runs for 5 seconds, shuts off, runs again for 25 seconds, and then is done. This always takes exactly 32 seconds, so technically I am within spec, but nobody else I have read mentions their pump cutting off intermittently. Also, the pump will turn back on if I depress the brake pedal twice. I am under the impression that the accumulator should hold pressure for more than two pumps of the pedal?
I have tried using techstream to test the SFR circuit, but every test I run fails before execution as if it cannot communicate correctly with the ABS ECU.
I know that it is not their responsibility, but I gave it a shot and called McGeorge Toyota Parts (I purchased the assembly from them) and asked if they knew of any extra procedures, and all they offered was that I had to bleed the system first.
The odds that a brand new assembly is faulty seems very low to me. So either I installed something incorrectly or there are more problems such as the ABS sensors at the wheel. The installation is pretty straight forward though: four bolts inside the firewall, pin on the brake pedal, reattach brake lines, reconnect pins to ABS ECU, bleed system. Am I missing anything?
Apologies for the long message, many thanks to anybody who gave a read and are willing to give advice.