WIDE VIEW FRONT MONITOR SYSTEM, Diagnostic DTC:C1681, C1682

DESCRIPTION

DTC C1681 is stored if the parking assist ECU judges as a result of its self check that a synchronization problem is occurring in the image signal sent from the front television camera assembly to the parking assist ECU.

DTC C1682 is stored if the parking assist ECU judges as a result of its self check that there is a problem with the current supplied from the front television camera assembly connected to the parking assist ECU.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK FOR DTC

   
   

   1. Clear the DTCs (Click here).

   2. Check for DTCs (Click here).

      Table 1. Result

      Result	Proceed to
      DTC C1681 and C1682 are not output	A
      DTC C1681 and/or C1682 is output	B

   
   
   • AClick here
   • BClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY AND BODY GROUND)

   
   

   1. Disconnect the I6 and I7 parking assist ECU connectors.

   2. Disconnect the A52 front television camera assembly connector.

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

      Standard Resistance

      Tester Connection Condition Specified Condition I7-36 (BCV-) - A52-4 (BCV-) Always Below 1 Ω I7-12 (BCV+) - A52-2 (BCV+) Always Below 1 Ω I7-35 (BGND) - A52-3 (BGND) Always Below 1 Ω I7-11 (BCB+) - A52-1 (BCB+) Always Below 1 Ω I7-36 (BCV-) - Body ground Always 10 kΩ or higher I7-12 (BCV+) - Body ground Always 10 kΩ or higher I7-35 (BGND) - Body ground Always 10 kΩ or higher I7-11 (BCB+) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK PARKING ASSIST ECU (BCB+, BGND)

   
   
   1. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition I7-35 (BGND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition I7-11 (BCB+) - I7-35 (BGND) Engine switch on (IG), wide view front and side monitor switch on 5.5 to 7.05 V

      Table 2. Text in Illustration

      *a	Component with harness connected (Parking Assist ECU)

      Table 3. Result

      Proceed to	Result
      OK	A
      NG (for LHD)	B
      NG (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
4. Click here

   CHECK FRONT TELEVISION CAMERA ASSEMBLY (BCV+, BGND)

   
   
   1. 

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

      Table 4. Text in Illustration

      *a	Component with harness connected (Parking Assist ECU)	*b	Waveform A
      *c	Waveform B	*d	Synchronized Signal
      *e	Video Waveform	-	-

      Tip:
      

      • A waterproof connector is used for the front television camera assembly. Therefore, inspect the waveform at the parking assist ECU with the connector connected.

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

      OK
      Waveform is as shown in the illustration.

      Item	Content
      Terminal No. (Symbol)	I7-12 (BCV+) - I7-35 (BGND)
      Tool Setting	200 mV/DIV., 50 μsec./DIV.
      Condition	Waveform A: Engine switch on (IG), wide view front and side monitor switch on and camera lens is not covered, displaying an image Waveform B: Engine switch on (IG), wide view front and side monitor switch on and camera lens is covered, blacking out the screen

      Table 5. Result

      Proceed to	Result
      OK (for LHD)	A
      OK (for RHD)	B
      NG	C

   
   
   • AClick here
   • BClick here
   • CClick here
5. Click here

   REPLACE PARKING ASSIST ECUClick here

6. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

7. Click here

   REPLACE FRONT TELEVISION CAMERA ASSEMBLYClick here

8. Click here

   USE SIMULATION METHOD TO CHECKClick here

9. Click here

   REPLACE PARKING ASSIST ECUClick here