DTC B1579: Voice Recognition Microphone Disconnected [08/2013 - 08/2016]: Procedure

1. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Navigation Receiver Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E67-19 (MIN-) - Body ground	Always	Below 1 Ω

   Result

   Result	Proceed to
   OK (w/ Sliding Roof)	A
   OK (w/o Sliding Roof)	B
   NG	C

Result: 

B 

See step  5

Result: 

C 

REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2013 - 08/2016] 

Result: 

A 

See step  2

1. Disconnect the E67 navigation receiver assembly connector.
2. Disconnect the O7 map light assembly (telephone microphone assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E67-6 (SNS2) - O7-12 (SNS2)	Always	Below 1 Ω
   E67-19 (MIN-) - O7-9 (MIC-)	Always	Below 1 Ω
   E67-6 (SNS2) - Body ground	Always	10 kΩ or higher
   E67-19 (MIN-) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the map light assembly (telephone microphone assembly).

   Refer to REMOVAL [08/2013 - 08/2016]

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   12 (SNS2) - 9 (MIC-)	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Map Light Assembly (Telephone Microphone Assembly))

Result: 

OK 

REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2013 - 08/2016] 

Result: 

NG 

See step  4

1. Replace the telephone microphone assembly.

   Refer to REMOVAL [08/2013 - 08/2016]

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [08/2013 - 08/2016]

   Body Electrical > Navigation System > Clear DTCs 

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

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

Result: 

OK 

END 

Result: 

NG 

REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL [08/2013 - 08/2016] 

1. Disconnect the E67 navigation receiver assembly connector.
2. Disconnect the O4 telephone microphone assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E67-6 (SNS2) - O4-3 (SNS2)	Always	Below 1 Ω
   E67-19 (MIN-) - O4-4 (MIC-)	Always	Below 1 Ω
   E67-6 (SNS2) - Body ground	Always	10 kΩ or higher
   E67-19 (MIN-) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Remove the telephone microphone assembly.

   Refer to REMOVAL [08/2013 - 08/2016]

2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Telephone Microphone Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 (SNS2) - 4 (MIC-)	Always	Below 1 Ω

Result: 

OK 

REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2013 - 08/2016] 

Result: 

NG 

REPLACE TELEPHONE MICROPHONE ASSEMBLY. Refer to  REMOVAL [08/2013 - 08/2016]