DTC B1579: Voice Recognition Microphone Disconnected [08/2015 - ]: Procedure

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I67-19 (MIN-) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Radio and Display Receiver Assembly)

NG → See step   5 

OK: Go to next step 

1. Disconnect the I67 radio and display receiver assembly connector.
2. Disconnect the S12 roof console box 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
   I67-6 (SNS2) - S12-15 (SNS2)	Always	Below 1 Ω
   I67-19 (MIN-) - S12-12 (MCO-)	Always	Below 1 Ω
   I67-6 (SNS2) - Body ground	Always	10 kΩ or higher
   I67-19 (MIN-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the roof console box assembly (telephone microphone assembly). Refer to REMOVAL [08/2015 - ] .
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   15 (SNS2) - 12 (MCO-)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Roof Console Box Assembly (Telephone Microphone Assembly))

NG → See step   4 

OK → See step   5