ABS and "!" lights are ON again!

[limochong]

Hi Guys~
I have 2007 Sedan model also...the other day both parking brake and ABS lights came on then both went off inself after driving it about 30mins. A few days later those two lights came on again then went off itself...after reading up on these posts i went to check under the car (both rear speed sensor wires and connectors). After observing i did not see any chafed or broken wires and damage to connectors. After cleaning the connectors and sensor areas with contact cleaners and re-connected them back.
I was fortunate to see no damage to wires or connectors. So far i don't see any problems with parking brake and ABS light. I think it's fixed for now~

P.S. I did check with OBD II but like the others peoples there was no fault code shown.(at least my case)
I do not know why it did not record any fault code in computer??

[CTScott]

Originally Posted by limochong

Hi Guys~
I have 2007 Sedan model also...the other day both parking brake and ABS lights came on then both went off inself after driving it about 30mins. A few days later those two lights came on again then went off itself...after reading up on these posts i went to check under the car (both rear speed sensor wires and connectors). After observing i did not see any chafed or broken wires and damage to connectors. After cleaning the connectors and sensor areas with contact cleaners and re-connected them back.
I was fortunate to see no damage to wires or connectors. So far i don't see any problems with parking brake and ABS light. I think it's fixed for now~

P.S. I did check with OBD II but like the others peoples there was no fault code shown.(at least my case)
I do not know why it did not record any fault code in computer??

A standard OBDII reader can't read fault codes from the ABS ECU. You need a Toyota TechStream Tool or an enhanced diagnostic tool to read fault codes from any ECU other than the ECM.

[limochong]

Oh I C~~ thanks for the info CTScott.

FYI guys mine had 73,000Km right now

[CTScott]

By the way, you can actually read the DTCs using just a jumper wire:

With the ignition off, jump the CG and TC pins on the OBD connector:



Turn the ignition on and watch the ABS light. If there are stored DTCs, It will flash in a pattern to indicate the code (71 for example will be shown as 7 quick flashes, a short pause, and then one quick flash).


C1271/71 Low output signal of front speed sensor RH
• Front speed sensor RH
• Front speed sensor RH circuit
• Sensor installation
• Foreign matter on sensor tip or sensor rotor
C1272/72 Low output signal of front speed sensor LH
• Front speed sensor LH
• Front speed sensor LH circuit
• Sensor installation
• Foreign matter on sensor tip or sensor rotor
C1273/73 Low output signal of rear speed sensor RH
• Skid control sensor RH
• Skid control sensor RH circuit
• Sensor installation
C1274/74 Low output signal of rear speed sensor LH
• Skid control sensor LH
• Skid control sensor LH circuit
• Sensor installation
C1275/75 Abnormal change in output signal of front speed
sensor RH
• Front speed sensor RH
• Front speed sensor RH circuit
• Foreign matter on sensor tip or sensor rotor
C1276/76 Abnormal change in output signal of front speed
sensor LH
• Front speed sensor LH
• Front speed sensor LH circuit
• Foreign matter on sensor tip or sensor rotor
C1277/77 Abnormal change in output signal of rear speed
sensor RH
• Skid control sensor RH
• Skid control sensor RH circuit
C1278/78 Abnormal change in output signal of rear speed
sensor LH
• Skid control sensor LH
• Skid control sensor LH circuit

[limochong]

Originally Posted by CTScott

By the way, you can actually read the DTCs using just a jumper wire:

With the ignition off, jump the CG and TC pins on the OBD connector:

Attachment 39321

Turn the ignition on and watch the ABS light. If there are stored DTCs, It will flash in a pattern to indicate the code (71 for example will be shown as 7 quick flashes, a short pause, and then one quick flash).


C1271/71 Low output signal of front speed sensor RH
• Front speed sensor RH
• Front speed sensor RH circuit
• Sensor installation
• Foreign matter on sensor tip or sensor rotor
C1272/72 Low output signal of front speed sensor LH
• Front speed sensor LH
• Front speed sensor LH circuit
• Sensor installation
• Foreign matter on sensor tip or sensor rotor
C1273/73 Low output signal of rear speed sensor RH
• Skid control sensor RH
• Skid control sensor RH circuit
• Sensor installation
C1274/74 Low output signal of rear speed sensor LH
• Skid control sensor LH
• Skid control sensor LH circuit
• Sensor installation
C1275/75 Abnormal change in output signal of front speed
sensor RH
• Front speed sensor RH
• Front speed sensor RH circuit
• Foreign matter on sensor tip or sensor rotor
C1276/76 Abnormal change in output signal of front speed
sensor LH
• Front speed sensor LH
• Front speed sensor LH circuit
• Foreign matter on sensor tip or sensor rotor
C1277/77 Abnormal change in output signal of rear speed
sensor RH
• Skid control sensor RH
• Skid control sensor RH circuit
C1278/78 Abnormal change in output signal of rear speed
sensor LH
• Skid control sensor LH
• Skid control sensor LH circuit

Thanks to CTScott, checked my OBD connector and jumped those two pins
confirmed that i have 73.

But there was also other lights were also blinked like transmission, airbag, P/S. etc
what are these CTScott??

[CTScott]

Originally Posted by limochong

Thanks to CTScott, checked my OBD connector and jumped those two pins
confirmed that i have 73.

But there was also other lights were also blinked like transmission, airbag, P/S. etc
what are these CTScott??

Jumping TC to CG does the same for those systems as well.