NAVIGATION SYSTEM(except Sedan) Reverse Signal Circuit

DESCRIPTION

for K311:

• The radio and display receiver assembly receives a reverse signal from the park/neutral position switch assembly.

for EA66, EC60, EC61, EC65A, EC69:

• The radio and display receiver assembly receives a reverse signal from the back-up light switch assembly.

WIRING DIAGRAM

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)

   
   

   1. Disconnect the E60 radio and display receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition E60-2 (REV) - Body ground Ignition switch ON Shift lever in R 11 to 14 V E60-2 (REV) - Body ground Ignition switch ON Shift lever in any position other than R Below 1 V

      Result
      Result Proceed to OK A NG (for K311) B NG (for EA66, EC60, EC61, EC69) C NG (for EC65A) D

   
   

   A

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   C

   CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY) Click here

   D

   CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY) Click here

   B

2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

   
   

   1. Disconnect the E60 radio and display receiver assembly connector.

   2. Disconnect the B110 park/neutral position switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E60-2 (REV) - B110-2 (RL) Always Below 1 Ω E60-2 (REV) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - BATTERY)

   
   

   1. Disconnect the B110 park/neutral position switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition B110-1 (RB) - Body ground Ignition switch ON 11 to 14 V

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

4. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY)

   
   

   1. Disconnect the E60 radio and display receiver assembly connector.

   2. Disconnect the B38 back-up light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E60-2 (REV) - B38-1 Always Below 1 Ω E60-2 (REV) - 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 (BACK-UP LIGHT SWITCH ASSEMBLY - BATTERY)

   
   

   1. Disconnect the B38 back-up light switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition B38-2 - Body ground Ignition switch ON 11 to 14 V

      Result
      Result Proceed to NG A OK (for EA66) B OK (for EC60) C OK (for EC61) D OK (for EC69) E

   
   

   A

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   B

   REPLACE BACK-UP LIGHT SWITCH ASSEMBLY (for EA66) Click here

   C

   REPLACE BACK-UP LIGHT SWITCH ASSEMBLY (for EC60) Click here

   D

   REPLACE BACK-UP LIGHT SWITCH ASSEMBLY (for EC61) Click here

   E

   REPLACE BACK-UP LIGHT SWITCH ASSEMBLY (for EC69) Click here

6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY)

   
   

   1. Disconnect the E60 radio and display receiver assembly connector.

   2. Disconnect the A102 back-up light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E60-2 (REV) - A102-1 (RL) Always Below 1 Ω E60-2 (REV) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY - BATTERY)

   
   

   1. Disconnect the A102 back-up light switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition A102-2 (RB) - Body ground Ignition switch ON 11 to 14 V

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE BACK-UP LIGHT SWITCH ASSEMBLY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR