DTC B150A: Lost Communication with HMI-LAN [10/2016 - 09/2020]: Procedure

1. w/ Navigation System
   1. Check if navigation system DTCs are output.

      Refer to DTC CHECK / CLEAR [06/2014 - 09/2018] , or refer to DTC CHECK / CLEAR [09/2018 - 09/2020]

      Body Electrical > Navigation System > Trouble Codes 

      OK

      Navigation system DTCs are not output.

2. w/ Audio and Visual System
   1. Check if audio and visual system DTCs are output.

      Refer to DTC CHECK / CLEAR [10/2016 - 09/2020]

      Body Electrical > Navigation System > Trouble Codes 

      OK

      Audio and visual system DTCs are not output.

   Result

   Result	Proceed to
   Navigation system DTCs are not output	A
   Audio and visual system DTCs are not output
   Navigation system DTCs are output	B
   Audio and visual system DTCs are output	C

Result: 

B 

GO TO NAVIGATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 09/2020] 

Result: 

C 

GO TO AUDIO AND VISUAL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 09/2020] 

Result: 

A 

See step  2

1. Disconnect the K58*1 or K135*2 radio receiver assembly connector.
2. Disconnect the K4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K58-4 (CNL1) - K4-9 (MSCL)*1	Always	Below 1 Ω
   K58-3 (CNH1) - K4-10 (MSCH)*1	Always	Below 1 Ω
   K135-4 (CNL1) - K4-9 (MSCL)*2	Always	Below 1 Ω
   K135-3 (CNH1) - K4-10 (MSCH)*2	Always	Below 1 Ω
   K58-4 (CNL1) or K4-9 (MSCL) - Body ground*1	Always	10 kΩ or higher
   K58-3 (CNH1) or K4-10 (MSCH) - Body ground*1	Always	10 kΩ or higher
   K135-4 (CNL1) or K4-9 (MSCL) - Body ground*2	Always	10 kΩ or higher
   K135-3 (CNH1) or K4-10 (MSCH) - Body ground*2	Always	10 kΩ or higher

   1. *1: w/ Navigation System
   2. *2: w/ Audio and Visual System

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Replace the combination meter assembly with a new or known good one.

   Refer to REMOVAL [10/2016 - 09/2020]

2. Turn the engine switch on (IG) and wait 30 seconds.
   NOTE:

   A maximum of 30 seconds is required to send/receive the registration information between the combination meter assembly and radio receiver assembly.

3. Operate the steering pad switch assembly and check that the audio tab illuminates.
   NOTE:

   For F SPORT models, operate the steering pad switch assembly after moving the movable meter ring.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Multi-information Display
   *b	Audio Tab

4. Check for DTCs.

   Refer to DTC CHECK / CLEAR [04/2013 - ]

   Body Electrical > Combination Meter > Trouble Codes 

   Result

   Result	Proceed to
   The audio tab illuminates and DTC B150A is not output	A
   The audio tab does not illuminate and DTC B150A is output (w/ Navigation System)	B
   The audio tab does not illuminate and DTC B150A is output (w/ Audio and Visual System)	C

Result: 

A 

END 

Result: 

B 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2013 - 09/2020] 

Result: 

C 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [04/2013 - 09/2020]