NAVIGATION SYSTEM, Diagnostic DTC:B1579

DESCRIPTION

The radio and display receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

This DTC is stored when a microphone connection detection signal line is disconnected.

• *: w/ Manual (SOS) Switch

WIRING DIAGRAM

1. w/o Manual (SOS) Switch

   

   *a	Map Light Assembly (Telephone Microphone Assembly)
   *b	Radio and Display Receiver Assembly

2. w/ Manual (SOS) Switch

   

   *a	Map Light Assembly (Telephone Microphone Assembly)
   *b	Telematics Transceiver
   *c	Radio and Display Receiver Assembly

PROCEDURE

1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

   
   
   1. 

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition F125-19 (MIN-) - Body ground Always Below 1 Ω

      Result
      Result Proceed to OK (w/o Manual (SOS) Switch) A OK (w/ Manual (SOS) Switch) B NG C

   
   

   B

   CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) Click here

   C

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   A

2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

   
   

   1. Disconnect the F125 radio and display receiver assembly connector.

   2. Disconnect the R2 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 F125-6 (SNS2) - R2-1 (SNS2) Always Below 1 Ω F125-19 (MIN-) - R2-7 (MCO-) Always Below 1 Ω F125-6 (SNS2) - Body ground Always 10 kΩ or higher F125-19 (MIN-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

   
   

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

   2. 

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 (SNS2) - 7 (MCO-) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   NG

   REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

4. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

   
   

   1. Disconnect the F51 telematics transceiver connector.

   2. Disconnect the R2 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 F51-35 (MCI-) - R2-7 (MCO-) Always Below 1 Ω F51-35 (MCI-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)

   
   

   1. Disconnect the F125 radio and display receiver assembly connector.

   2. Disconnect the F51 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F125-19 (MIN-) - F51-19 (MCO-) Always Below 1 Ω F125-19 (MIN-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))

   
   

   1. Disconnect the F125 radio and display receiver assembly connector.

   2. Disconnect the R2 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 F125-6 (SNS2) - R2-1 (SNS2) Always Below 1 Ω F125-6 (SNS2) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. INSPECT TELEMATICS TRANSCEIVER

   
   

   1. Reconnect the telematics transceiver connector.

   2. 

      *a	Component with harness connected (Telematics Transceiver)

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

      Standard Resistance
      Tester Connection Condition Specified Condition F51-35 (MCI-) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)

   
   

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

      Click here

   2. 

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 (SNS2) - 7 (MCO-) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR