Toyota Parking Assist-Sensor System Speed Signal Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK COMBINATION METER ASSEMBLY

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - COMBINATION METER ASSEMBLY)

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - NO. 3 JUNCTION BLOCK)

DESCRIPTION

HINT:

1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
   
2. If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the diagram below will not operate normally.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Inspect the circuits that send vehicle speed signals to the combination meter system (CAMRY_ACV40 RM000002UD700ZX.html).
   

2. During the inspection, if there is an instruction that indicates to go back to inspections for each system, proceed to the next step.
   

1. Disconnect the F2 connector from the combination meter assembly and the S17 connector from the clearance warning ECU.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   S17-10 (SPD) - F2-12 (+S)	Always	Below 1 Ω

1. Disconnect the S17 connector from the clearance warning ECU.
   

   
   
   
   

2. Disconnect the No. 3 junction block connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   S17-10 (SPD) - 3B-10	Always	Below 1 Ω