I started getting this warning (1103: ABS Error) over the weekend, along with a red FAULT indicator and a flashing BRAKE indicator.
Would welcome any suggestions how to troubleshoot. I've done a fair bit of brake work on my older cars (fabricated lines, rebuilt a booster, installed pad wear sensors, etc.), but have no experience with ABS :-(
Where do I start troubleshooting? TYIA!
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Longer context / chain of events:
I started replacing the radio head unit over the weekend (will write up my experiences when it's done). Things went smoothly thanks to all the guidance on here (and $35 spent on Tesla service access for circuit and connector diagrams).
However, at some point I started getting Warning 525: ABS short circuit
I checked out all the wires in the areas I had touched (the circuit diagrams on the Tesla service page help identify them) and did not notice any obvious issues.
After a bit of googling I figured I should check the wheel speed sensors for voltage and resistance. I pulled the front left sensor wire, and found that I had 12V at the plug, but that the sensor itself had near infinite resistance (~3 M Ohm).
This error started occurring shortly after I plugged it back in. I removed, cleaned, and replugged several times, to no avail.
Separately I kept thinking about what may have gotten disturbed while I replaced the radio and got concerned about the thick wire loom at the switchpack (I could trigger an SRS warning by wiggling on the wires). On a hunch I unplugged, blew out, and replugged the 5 connectors on the switchpack (after inhibiting the APS) - and warning 525 (short circuit) and the SRS warning disappeared.
However, the 1103 ABS Error stayed :-(
Would welcome any suggestions how to troubleshoot. I've done a fair bit of brake work on my older cars (fabricated lines, rebuilt a booster, installed pad wear sensors, etc.), but have no experience with ABS :-(
Where do I start troubleshooting? TYIA!
---------
Longer context / chain of events:
I started replacing the radio head unit over the weekend (will write up my experiences when it's done). Things went smoothly thanks to all the guidance on here (and $35 spent on Tesla service access for circuit and connector diagrams).
However, at some point I started getting Warning 525: ABS short circuit
I checked out all the wires in the areas I had touched (the circuit diagrams on the Tesla service page help identify them) and did not notice any obvious issues.
After a bit of googling I figured I should check the wheel speed sensors for voltage and resistance. I pulled the front left sensor wire, and found that I had 12V at the plug, but that the sensor itself had near infinite resistance (~3 M Ohm).
This error started occurring shortly after I plugged it back in. I removed, cleaned, and replugged several times, to no avail.
Separately I kept thinking about what may have gotten disturbed while I replaced the radio and got concerned about the thick wire loom at the switchpack (I could trigger an SRS warning by wiggling on the wires). On a hunch I unplugged, blew out, and replugged the 5 connectors on the switchpack (after inhibiting the APS) - and warning 525 (short circuit) and the SRS warning disappeared.
However, the 1103 ABS Error stayed :-(