DTC B1579: Voice Recognition Microphone Disconnected: Procedure

1. Measure the resistance according to the value(s) in the table below.
   Fig 1: Measuring Resistance Of Radio & Display Receiver Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E5-19 (MIN-) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   14 

OK: Go to next step 

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Manual (SOS) Switch	A
   w/o Manual (SOS) Switch (w/o Sliding Roof System)	B
   w/o Manual (SOS) Switch (w/ Sliding Roof System)	C

B → See step   8 

C → See step   11 

A: Go to next step 

1. Disconnect the E11 DCM (telematics transceiver) connector.
2. Disconnect the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E11-35 (MCI-) - N2-12 (MIC-)	Always	Below 1 Ω
   E11-35 (MCI-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E5 radio and display receiver assembly connector.
2. Disconnect the E11 DCM (telematics transceiver) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E5-19 (MIN-) - E11-19 (MCO-)	Always	Below 1 Ω
   E5-19 (MIN-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E5 radio and display receiver assembly connector.
2. Disconnect the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E5-6 (SNS2) - N2-10 (SGND)	Always	Below 1 Ω
   E5-6 (SNS2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the E11 DCM (telematics transceiver) connector.
2. Reconnect the E5 radio and display receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.
   Fig 2: Measuring Resistance Of DCM (Telematics Transceiver) Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E11-35 (MCI-) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   15 

OK: Go to next step 

1. Remove the inner rear view mirror assembly (amplifier microphone assembly).
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Measuring Resistance Of Inner Rear View Mirror Assembly (Amplifier Microphone Assembly) Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   10 (SGND) - 12 (MIC-)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly)

NG → See step   16 

OK → See step   14 

1. Disconnect the E5 radio and display receiver assembly connector.
2. Disconnect the N6 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
   E5-6 (SNS2) - N6-15 (SNS2)	Always	Below 1 Ω
   E5-19 (MIN-) - N6-12 (MCO-)	Always	Below 1 Ω
   E5-6 (SNS2) - Body ground	Always	10 kΩ or higher
   E5-19 (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).
2. Measure the resistance according to the value(s) in the table below.
   Fig 4: Measuring Resistance Of Roof Console Box Assembly (Telephone Microphone Assembly) Connector

   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   10 

OK → See step   14 

1. Replace the telephone microphone assembly. Refer to REMOVAL .
2. Clear the DTCs. Refer to DTC CHECK / CLEAR .
3. Recheck for DTCs and check that no DTCs are output.

   OK

   No DTCs are output.

NG → See step   13 

OK → END 

1. Disconnect the E5 radio and display receiver assembly connector.
2. Disconnect the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E5-6 (SNS2) - N2-10 (SGND)	Always	Below 1 Ω
   E5-19 (MIN-) - N2-12 (MIC-)	Always	Below 1 Ω
   E5-6 (SNS2) - Body ground	Always	10 kΩ or higher
   E5-19 (MIN-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the inner rear view mirror assembly (amplifier microphone assembly).
2. Measure the resistance according to the value(s) in the table below.
   Fig 5: Measuring Resistance Of Inner Rear View Mirror Assembly (Amplifier Microphone Assembly) Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   10 (SGND) - 12 (MIC-)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly)

NG → See step   16 

OK → See step   14