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Home >> Lexus >> 2017 >> RX 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Navigation System - Diagnostic Codes >> Navigation System >> DTC B1321: Lost Communication with EMV; DTC B1322: Lost Communication with Display; DTC B1323: Lost Communication with Haptic Device; DTC B1324: Lost Communication with Meter; DTC B1325: Lost Communication with HUD; DTC B1326: Lost Communication with Clock Device (Local-CAN); DTC B1542: Clock Device Disconnected (Local-CAN); DTC B1563: Haptic Device Disconnected [09/2015 - 08/2019] >> Description
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DTC B1321: Lost Communication with EMV; DTC B1322: Lost Communication with Display; DTC B1323: Lost Communication with Haptic Device; DTC B1324: Lost Communication with Meter; DTC B1325: Lost Communication with HUD; DTC B1326: Lost Communication with Clock Device (Local-CAN); DTC B1542: Clock Device Disconnected (Local-CAN); DTC B1563: Haptic Device Disconnected [09/2015 - 08/2019]: Description

These DTCs are stored when communication between the radio receiver assembly and remote touch (remote operation board), accessory meter assembly, combination meter assembly, headup display (meter mirror sub-assembly) or clock assembly is not possible.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1321 Lost Communication with EMV The components connected via local bus communication do not receive the registration information signal from the radio receiver assembly for 30 seconds or more
  • Local bus communication line
  • Remote touch (remote operation board)
  • Accessory meter assembly
  • Combination meter assembly
  • Headup display (meter mirror sub-assembly)*
  • Clock assembly
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
B1322 Lost Communication with Display The radio receiver assembly does not receive the registration information signal from the accessory meter assembly for 30 seconds or more
  • Local bus communication line
  • Accessory meter assembly power source circuit
  • Accessory meter assembly
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
B1323 Lost Communication with Haptic Device The radio receiver assembly does not receive the registration information signal from the remote touch (remote operation board) for 30 seconds or more
  • Local bus communication line
  • Remote touch (remote operation board) power source circuit
  • Remote touch (remote operation board)
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
B1324 Lost Communication with Meter After the radio receiver assembly receives a registration information signal, which is sent by the combination meter assembly when the engine switch is turned on (IG), 1 or more times, the radio receiver assembly does not receive the signal for 30 seconds or more
  • Local bus communication line
  • Combination meter assembly power source circuit
  • Combination meter assembly
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
B1325 Lost Communication with HUD After the radio receiver assembly receives a registration information signal, which is sent by the headup display (meter mirror sub-assembly) when the engine switch is turned on (IG), 1 or more times, the radio receiver assembly does not receive the signal for 30 seconds or more*
  • Local bus communication line
  • Headup display (meter mirror sub-assembly) power source circuit
  • Headup display (meter mirror sub-assembly)
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
B1326 Lost Communication with Clock Device (Local-CAN) After the radio receiver assembly receives a registration information signal, which is sent by the clock assembly when the engine switch is turned on (IG), 1 or more times, the radio receiver assembly does not receive the signal for 30 seconds or more
  • Local bus communication line
  • Clock assembly power source circuit
  • Clock assembly
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
B1542 Clock Device Disconnected (Local-CAN) After the engine switch turned on (ACC), the registration information signal from the clock assembly does not match with the registration history information
  • Local bus communication line
  • Clock assembly power source circuit
  • Clock assembly
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
B1563 Haptic Device Disconnected The remote touch (remote operation board) is/was not connected while the engine switch is/was on (ACC) or on (IG)
  • Local bus communication line
  • Remote touch (remote operation board) power source circuit
  • Remote touch (remote operation board)
  • Radio receiver assembly
  • No. 2 CAN junction connector
  • Harness or connector
  1. *: w/ Headup Display (Meter Mirror Sub-assembly)

HINT: 

The radio receiver assembly is the master unit.