Error codes

[Batesy]

My 2015 RX has thrown a few codes and was seeing if anyone could point me in the right direction to sort them.

P0504. BRAKE SWITCH SIGNAL CONSISTENCY.

P1525. CONSISTENT MULTIPLEX SIGNALS FOR CC/SL

P0564. SL LMTR/CC FNC.

A bit of back ground, the cruise control stopped working a few years back. It would switch on but would not set the speed. I had a mate look at it but couldn’t sort it so I just forgot about it.
A while later the engine light came on but I couldn’t find any issues and was still driving fine so haven’t worried about it until now but it’s time to sort it out I think. Any help would be appreciated.

 

[tweak'e]

P0564
SL LMTR/CC FNC
(Cruise Control Multi-Function Input “A” Circuit)
• 1.DEF
• 2.DEF
• CO.1
• An ASCD steering switch signal voltage is out of the specified
range.
• ASCD steering switch signal circuit is open.
• ASCD steering switch signal circuit is short to battery.
• ECM cannot detect the ASCD steering switch signal.

P0504
BRAKE SWITCH SIGNAL CONSISTENCY
(Brake switch “A”/“B” correlation)
• 1.DEF
• 2.DEF
• 5.DEF
ECM detects ON signals sent from the stop lamp switch and the
brake pedal position switch at the same time.

P1525
CONSISTENT MULTIPLEX SIGNALS FOR
CC/SL
(Consistent multiplex signals for CC/SL)
• 1.DEF
Other DTC that illuminates MIL is detected while ASCD is operating.

check the brake switches are working. odds are one has failed.

check cruise control switch, possible clock spring problem. maybe plug loose if its been looked at before.

 

[Batesy]

P0564
SL LMTR/CC FNC
(Cruise Control Multi-Function Input “A” Circuit)
• 1.DEF
• 2.DEF
• CO.1
• An ASCD steering switch signal voltage is out of the specified
range.
• ASCD steering switch signal circuit is open.
• ASCD steering switch signal circuit is short to battery.
• ECM cannot detect the ASCD steering switch signal.

P0504
BRAKE SWITCH SIGNAL CONSISTENCY
(Brake switch “A”/“B” correlation)
• 1.DEF
• 2.DEF
• 5.DEF
ECM detects ON signals sent from the stop lamp switch and the
brake pedal position switch at the same time.

P1525
CONSISTENT MULTIPLEX SIGNALS FOR
CC/SL
(Consistent multiplex signals for CC/SL)
• 1.DEF
Other DTC that illuminates MIL is detected while ASCD is operating.

check the brake switches are working. odds are one has failed.

check cruise control switch, possible clock spring problem. maybe plug loose if its been looked at before.

Thanks so much mate, i appreciate it heaps