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
   I8-19 (MIN-) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Navigation Receiver Assembly)

NG → See step   10 

OK: Go to next step 

1. Choose the model to be inspected.

   Result

   Model	Proceed to
   w/ Manual (SOS) Switch	A
   w/o Manual (SOS) Switch	B

B → See step   7 

A: Go to next step 

1. Disconnect the I135 DCM (telematics transceiver) 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
   I135-35 (MCI-) - S12-12 (MCO-)	Always	Below 1 Ω
   I135-35 (MCI-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the I8 navigation receiver assembly connector.
2. Disconnect the I135 DCM (telematics transceiver) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I8-19 (MIN-) - I135-19 (MCO-)	Always	Below 1 Ω
   I8-19 (MIN-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the I8 navigation 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
   I8-6 (SNS2) - S12-15 (SNS2)	Always	Below 1 Ω
   I8-6 (SNS2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

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
   I135-35 (MCI-) - Body ground	Always	Below 1 Ω

2. Proceed to the next step based on the inspection result.

   Result

   Result	Proceed to
   NG	A
   OK	B

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (DCM (Telematics Transceiver))

B → See step   8 

A → See step   11 

1. Disconnect the I8 navigation 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
   I8-6 (SNS2) - S12-15 (SNS2)	Always	Below 1 Ω
   I8-19 (MIN-) - S12-12 (MCO-)	Always	Below 1 Ω
   I8-6 (SNS2) - Body ground	Always	10 kΩ or higher
   I8-19 (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   9 

OK → See step   10