DTC C1622: Back Camera Disconnected [03/2017 - 05/2023]: Procedure

1. Disconnect the d1 television camera assembly connector.
2. Disconnect the P42 multi-display connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   d1-8 (CB+) - P42-10 (CA+)	Always	Below 1 Ω
   d1-4 (CV+) - P42-8 (V+)	Always	Below 1 Ω
   d1-3 (CV-) - P42-9 (V-)	Always	Below 1 Ω
   d1-7 (CGND) - P42-21 (CGND)	Always	Below 1 Ω
   d1-8 (CB+) or P42-10 (CA+) - Body ground	Always	10 kΩ or higher
   d1-4 (CV+) or P42-8 (V+) - Body ground	Always	10 kΩ or higher
   d1-3 (CV-) or P42-9 (V-) - Body ground	Always	10 kΩ or higher
   d1-7 (CGND) or P42-21 (CGND) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Remove the multi-display with the connector still connected.

   Refer to REMOVAL [03/2017 - 05/2023]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Multi-display)

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   P42-10 (CA+) - P42-21 (CGND)	Engine switch on (ACC)	5.5 to 7.05 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P42-21 (CGND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE MULTI-DISPLAY. Refer to  REMOVAL [03/2017 - 05/2023] 

Result: 

OK 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the multi-display with the connector still connected.

   Refer to REMOVAL [03/2017 - 05/2023]

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

   Item	Content
   Measurement terminal	P42-8 (V+) - P42-9 (V-)
   Measurement setting	200 mV/DIV., 50 μsec./DIV.
   Condition	Waveform 1: Engine running, shift position in R, camera lens is not covered, displaying an image. Waveform 2: Engine running, shift position in R, camera lens is covered, blacking out the screen.

   HINT: 

   • The video waveform changes according to the image sent by the television camera assembly.
   • The video waveform is constantly output when the engine switch is on (ACC).

   OK

   Waveform is as shown in the illustration.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE TELEVISION CAMERA ASSEMBLY. Refer to  REMOVAL [03/2017 - 05/2023] 

Result: 

OK 

See step  4

1. Replace the multi-display with a new or known good one.

   Refer to REMOVAL [03/2017 - 05/2023]

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [03/2017 - 06/2019] , or refer to DTC CHECK / CLEAR [06/2019 - 04/2020] , or refer to DTC CHECK / CLEAR [04/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - 05/2023]

   Body Electrical > Navigation System > Clear DTCs 

3. Check for DTCs and check that no DTCs are output.

   Refer to DTC CHECK / CLEAR [03/2017 - 06/2019] , or refer to DTC CHECK / CLEAR [06/2019 - 04/2020] , or refer to DTC CHECK / CLEAR [04/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - 05/2023]

   Body Electrical > Navigation System > Trouble Codes 

   Result

   Result	Proceed to
   DTC C1622 is not output	A
   DTC C1622 is output	B

Result: 

A 

END 

Result: 

B 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [03/2017 - 05/2023]