Toyota Parking Assist-Sensor System Reverse Signal Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (GAUGE NO. 1)

CHECK CLEARANCE WARNING ECU (REVERSE SIGNAL INPUT)

CONFIRM MODEL

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - PARK/NEUTRAL POSITION SWITCH)

INSPECT PARK/NEUTRAL POSITION SWITCH

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - PARK/NEUTRAL POSITION SWITCH)

INSPECT PARK/NEUTRAL POSITION SWITCH

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

INSPECT BACK-UP LIGHT SWITCH

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Remove the GAUGE NO. 1 fuse from the main body ECU (instrument panel junction block ).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   GAUGE NO. 1 fuse	Always	Below 1 Ω

1. Disconnect the O28 connector from the clearance warning ECU.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   O28-8 (RL) - Body ground	Ignition switch ON, shift lever in R	7 V or higher

1. Choose the model to be inspected.
   

   Result:

   Model	Proceed to
   for A/T (U250E)	A
   for A/T (U660E)	B
   for M/T	C

1. Disconnect the O28 connector from the clearance warning ECU.
   

2. Disconnect the C1 connector from the park/neutral position switch.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   O28-8 (RL) - C1-1 (RL)	Always	Below 1 Ω
   O28-8 (RL) - Body ground	Always	10 kΩ or higher

1. Remove the park/neutral position switch (CAMRY_ACV40 RM000000YWR014X.html).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   1 (RL) - 2 (RB)	Shift lever in R	Below 1 Ω
   1 (RL) - 2 (RB)	Shift lever in any position except R	10 kΩ or higher

1. Disconnect the O28 connector from the clearance warning ECU.
   

2. Disconnect the C1 connector from the park/neutral position switch.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   O28-8 (RL) - C1-2 (RL)	Always	Below 1 Ω
   O28-8 (RL) - Body ground	Always	10 kΩ or higher

1. Remove the park/neutral position switch (CAMRY_ACV40 RM0000016E102IX.html).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   2 (RL) - 1 (RB)	Shift lever in R	Below 1 Ω
   2 (RL) - 1 (RB)	Shift lever in any position except R	10 kΩ or higher

1. Disconnect the O28 connector from the clearance warning ECU.
   

2. Disconnect the C28 connector from the back-up light switch.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   O28-8 (RL) - C28-1	Always	Below 1 Ω
   O28-8 (RL) - Body ground	Always	10 kΩ or higher

1. Remove the back-up light switch.
   

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