DTC B1559: Touch Pad Sensor Malfunction [08/2019 - ]: Procedure

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. Recheck for DTCs and check that no DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   HINT: 

   • If DTC B155B is output, perform troubleshooting for DTC B155B first.

     Refer to DTC B155B: Touch Pad Memory Module Malfunction [08/2019 - ] 

   • Remote touch screen touch detection is performed using the electrostatic sensor and G sensor. However, there is no effect on the basic functions of the remote touch screen when the G sensor is not operating. Therefore, a counter is used to prevent DTCs from being output immediately (in order to reduce excessive DTC output). Therefore, when DTCs are not output, it is necessary to turn the power switch from on (ACC) to off and check for DTCs again.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - 07/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

Result: 

NG 

See step  2

1. Enter self-diagnostic mode.

   Refer to OPERATION CHECK [08/2019 - ]

2. Operate the remote touch screen diagonally from the upper left to the lower right and check that the brightness of the switch illumination changes.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Switch Illumination
   *b	Remote Touch Screen

   NOTE:

   Since the remote touch screen may recognize a pinch in/out operation if operated with 2 fingers, always use 1 finger to operate the remote touch screen in self-diagnostic mode.

   OK

   Brightness changes according to remote touch screen operation.

   Result

   Result	Proceed to
   Brightness of the switch illumination changes according to remote touch screen operation.	A
   Brightness of the switch illumination does not change according to remote touch screen operation.	B
   Switch illumination continues to blink.

Result: 

B 

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY). Refer to  REMOVAL [08/2019 - ] 

Result: 

A 

See step  3

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. Turn the power switch off.
3. Turn the power switch on (ACC) and wait for 40 seconds.
4. Recheck for DTCs and check that no DTCs are output.

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   HINT: 

   Remote touch screen touch detection is performed using the electrostatic sensor and G sensor. However, there is no effect on the basic functions of the remote touch screen when the G sensor is not operating. Therefore, a counter is used to prevent DTCs from being output immediately (in order to reduce excessive DTC output). Therefore, when DTCs are not output, it is necessary to turn the power switch from on (ACC) to off and check for DTCs again.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - 07/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - ] 

Result: 

NG 

REPLACE REMOTE TOUCH (REMOTE OPERATION CONTROLLER ASSEMBLY). Refer to  REMOVAL [08/2019 - ]