DTC B150A: Lost Communication with HMI-LAN [10/2014 - 09/2017]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   except 8 Speakers	A
   for 8 Speakers	B

Result: 

B 

See step  6

Result: 

A 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2014 - 09/2017]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO NAVIGATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2014 - 09/2017] 

Result: 

OK 

See step  3

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2014 - 09/2017]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO AUDIO AND VISUAL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017] 

Result: 

OK 

See step  4

1. Disconnect the I11 combination meter assembly connector.
2. Disconnect the I38 radio receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I11-10 (MSCH) - I38-20 (CNH2)	Always	Below 1 Ω
   I11-9 (MSCL) - I38-21 (CNL2)	Always	Below 1 Ω
   I11-10 (MSCH) or I38-20 (CNH2) - Body ground	Always	10 kΩ or higher
   I11-9 (MSCL) or I38-21 (CNL2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Replace the combination meter assembly.

   Refer to REMOVAL [10/2014 - 09/2017]

2. Turn the power 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.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Multi-information Display
   *b	Audio Tab

4. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2014 - ]

   Body Electrical > Combination Meter > Trouble Codes 

   OK

   The audio tab illuminates and DTC B150A is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (COMBINATION METER ASSEMBLY IS DEFECTIVE) 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2014 - 09/2017] 

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2014 - 09/2017]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO AUDIO AND VISUAL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017] 

Result: 

OK 

See step  7

1. Disconnect the I11 combination meter assembly connector.
2. Disconnect the I122 radio receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I11-10 (MSCH) - I122-3 (CNH1)	Always	Below 1 Ω
   I11-9 (MSCL) - I122-4 (CNL1)	Always	Below 1 Ω
   I11-10 (MSCH) or I122-3 (CNH1) - Body ground	Always	10 kΩ or higher
   I11-9 (MSCL) or I122-4 (CNL1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

See step  5

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR