DTC C13AD/23: Open in +B Circuit: Procedure

1. Remove the E-PKB fuse from the luggage room junction block.
2. Measure the resistance of the fuse.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E-PKB fuse	Always	Below 1 Ω

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   3 

A: Go to next step 

1. Disconnect the S46 ECU connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying S46 ECU Connector Terminals +B

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S46-8 (+B) - Body ground	Always	10 kΩ or higher

NG → CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

OK → REPLACE FUSE 

1. Disconnect the S46 ECU connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying S46 ECU Connector Terminals +B

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   S46-8 (+B) - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG) and the Techstream on.
4. Enter the following menus: Chassis / Electric Parking Brake / Data List.
5. Check the values by referring to the table below.
   ELECTRIC PARKING BRAKE
   
   

   Tester Display	Measurement Item/Range	Switch Condition	Normal Condition
   ECU Voltage Monitor	+B power source information display/ min.: 0.00 V max.: 20.00 V	-	11 to 14 V

   OK

   Values are as shown in normal condition.

NG → See step   5 

OK → See step   6