Electric Parking Brake does not Operate: Procedure

1. Start the engine and move the shift lever to D. Then depress the brake pedal and push the electric parking brake switch to the lock side for 1 second. Check the parking brake indicator light (RED) condition.
2. Release the brake pedal and check that the vehicle does not move.
3. Depress the brake pedal and pull the electric parking brake switch to the release side for 1 second. Check the parking brake indicator light (RED) condition.
4. Release the brake pedal and check that the vehicle moves.

   Result

   Result	Proceed to
   Lock and release control is normal; parking brake indicator light (RED) is off or is blinking	A
   Lock and release control is malfunctioning; parking brake indicator light (RED) is illuminated or off depending on switch operation	B
   Lock and release control is malfunctioning; parking brake indicator light (RED) is off or is blinking	C

B → See step   7 

C → See step   4 

A: 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 / Active Test.
5. Check the condition of the parking brake indicator light (RED) by operating the tester.
   ELECTRIC PARKING BRAKE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   PKB Light	Parking brake indicator light (RED)	ON or OFF	Vehicle speed is 0 km/h (0 mph)

   OK

   Indicator light turns on when operating the tester.

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   8 

A: Go to next step 

Fig 1: Identifying Harness And Connector (ECU - Meter)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S46 ECU connector.
2. Disconnect the L10 meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S46-7 (TX) - L10-24 (EPB)*	Always	Below 1 Ω
   S46-7 (TX) - Body ground	Always	10 kΩ or higher

   HINT: 

   *: Stands for electric parking brake

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   9 

1. Remove the ECU-B2 fuse from engine room No. 2 relay block.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   ECU-B2 fuse	Always	Below 1 Ω

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   6 

A: Go to next step 

1. Disconnect the S48 ECU connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying S48 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S48-2 (BECU) - Body ground	Always	10 kΩ or higher

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

OK → REPLACE FUSE 

1. Disconnect the S48 ECU connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 3: Identifying S48 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Condition	Specified Condition
   S48-2 (BECU) - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8