Display Signal Circuit between Navigation Receiver Assembly and Television Camera Assembly: Procedure

1. Disconnect the E4 navigation receiver assembly.
2. Disconnect the T16 television camera assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   T16-2 (CV+) - E4-22 (V+)	Always	Below 1 Ω
   T16-4 (CB+) - E4-24 (CA+)	Always	Below 1 Ω
   T16-3 (CGND) - E4-21 (CGND)	Always	Below 1 Ω
   T16-1 (CV-) - E4-23 (V-)	Always	Below 1 Ω
   T16-2 (CV+) - Body ground	Always	10 kΩ or higher
   T16-4 (CB+) - Body ground	Always	10 kΩ or higher
   T16-3 (CGND) - Body ground	Always	10 kΩ or higher
   T16-1 (CV-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the E4 navigation receiver assembly.
   Fig 1: Identifying E4 Navigation Receiver Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Navigation Receiver Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E4-24 (CA+) - E4-21 (CGND)	Ignition switch ON Shift lever in R	5.5 to 7.05 V

NG → See step   5 

OK: Go to next step 

1. Reconnect the T16 television camera assembly.
2. Check that the E2 and E4 connectors are connected to the navigation receiver assembly.
   Fig 2: Identifying E2 And E4 Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Navigation Receiver Assembly)

3. Check the waveform of the television camera assembly using an oscilloscope.
   Fig 3: Identifying Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

   A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the navigation receiver assembly with the connector connected.

   OK

   Waveform is similar to that shown in the illustration.

   Item	Content
   Terminal No. (Symbol)	E4-22 (V+) - E2-20 (GND)
   Tool Setting	200 mV/DIV., 50 μsec./DIV.
   Condition	Ignition switch ON, shift lever in R

   HINT: 

   The video waveform changes according to the image sent by the television camera assembly.

   TEXT IN ILLUSTRATION
   
   

   *a	Waveform 1 (camera lens not covered, displaying an image)
   *b	Waveform 2 (camera lens covered, blacking out the screen)
   *c	Synchronization Signal
   *d	Video Waveform

NG → See step   6 

OK → See step   4