Display Signal Circuit between Television Camera ECU and Television Camera Assembly

DESCRIPTION

This is the display signal circuit of the television camera assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK NAVIGATION DISPLAY

1. Check whether the navigation display appears properly or not.

   OK:

   The navigation display properly appears.
   

   HINT:

   1. When the navigation display has trouble, inspect the circuit between the television camera ECU and multi-display (Click here).
      
   2. When the navigation display is normal, inspect the circuit between the television camera ECU and television camera assembly by following the steps below.
      

NG	GO TO NAVIGATION SYSTEM

OK

2. CHECK HARNESS AND CONNECTOR (TELEVISION CAMERA ECU - TELEVISION CAMERA ASSEMBLY)

1. Disconnect the J92 connector from the television camera ECU.

2. Disconnect the Q43 connector from the television camera assembly.
   

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

   Standard resistance:

   Tester connection (Terminal No.)	Condition	Specified condition
   CB+ (J92-40) - CB+ (Q43-4)	Always	Below 1 Ω
   CGND (J92-39) - CGND (Q43-3)	Always	Below 1 Ω
   CV+ (J92-20) - CV+ (Q43-2)	Always	Below 1 Ω
   CV- (J92-19) - CV- (Q43-1)	Always	Below 1 Ω
   CB+ (J92-40) - Body ground	Always	10 kΩ or higher
   CGND (J92-39) - Body ground	Always	10 kΩ or higher
   CV+ (J92-20) - Body ground	Always	10 kΩ or higher
   CV- (J92-19) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. INSPECT TELEVISION CAMERA ECU

1. Reconnect the J92 connector to the television camera ECU.
   

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

   Standard voltage:

   Tester connection (Terminal No.)	Condition	Specified condition
   CB+ (Q43-4) - CGND (Q43-3)	Engine SW on (IG), shift lever reverse position	Approx. 6 V

NG	REPLACE TELEVISION CAMERA ECU

OK

4. INSPECT TELEVISION CAMERA ASSEMBLY

1. Reconnect the Q43 connector to the television camera assembly.
   

2. Check the waveform of the television camera assembly using an oscilloscope.

   1. Measurement terminal: CV+ - CV-Measurement setting: 0.2 V/DIV, 0.2 μs/DIV.Condition : Engine SW on (IG), shift lever in R position

      OK:

      Pulses as shown in the illustration.
      

NG	REPLACE TELEVISION CAMERA ASSEMBLY

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE