Toyota Parking Assist-Sensor System (W/O Multi-Display) Back-Up Light Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT BACK-UP LIGHT SWITCH ASSEMBLY

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

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BACK-UP LIGHT SWITCH)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1. Disconnect the C41 back-up light switch assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Pushed	Below 1 Ω
   1 - 2	Released	10 kΩ or higher

   Result

   Result	Proceed to
   OK	A
   NG (for RA61F)	B
   NG (for R150F)	C
   NG (for G52F)	D

1. Disconnect the C41 back-up light switch assembly connector.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   C41-2 - Body ground	Ignition switch ON	11 to 14 V
   C41-2 - Body ground	Ignition switch off	Below 1 V

   Text in Illustration

   *a	Front view of wire harness connector (to Back-up Light Switch Assembly)

1. Disconnect the I1 clearance warning ECU connector.
   

2. Disconnect the C41 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
   I1-13 (RL) - C41-1 (RL)	Always	Below 1 Ω
   I1-13 (RL) - Body ground	Always	10 kΩ or higher