Brake Warning Light Remains ON: Procedure

1. Check if a CAN communication system DTC is output. Refer to DIAGNOSIS SYSTEM .

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → See step   14 

A: Go to next step 

1. Check if a multiplex communication system DTC is output. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → See step   18 

A: Go to next step 

1. Check if the skid control ECU connector is securely connected.

   OK

   The connector is securely connected.

NG → CONNECT CONNECTOR TO ECU CORRECTLY 

OK: Go to next step 

1. Check the battery voltage.

   Standard Voltage

   11 to 14 V

   Result

   Result	Proceed to
   OK	A
   NG (for 2GR-FSE)	B
   NG (for 4GR-FSE)	C

B → See step   15 

C → See step   19 

A: Go to next step 

1. Disconnect the skid control ECU connector.
   Fig 1: Identifying Skid Control ECU Connector Terminals (IG1 Terminal)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A58-34 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 

OK: Go to next step 

1. Turn the engine switch off.
   Fig 2: Identifying Skid Control ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A58-1 (GND1) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT) 

OK: Go to next step 

1. Reconnect the skid control ECU connector.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Select the Data List on the Techstream. Refer to DATA LIST / ACTIVE TEST .
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Parking Brake SW	Parking brake switch / ON or OFF	ON: Parking brake applied OFF: Parking brake released	-

5. Using the Techstream, check the switch condition on the Techstream changes according to parking brake operation.

   OK

   The Techstream displays ON or OFF according to parking brake pedal operation.

NG → See step   11 

OK: Go to next step 

1. Turn the engine switch off.
   Fig 3: Inspecting Brake Fluid Level Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the reservoir filler cap and strainer.
3. Disconnect the brake fluid level warning switch connector.
4. Measure the resistance according to the value(s) in the table below.

   HINT: 

   A float is located inside the reservoir. Its position can be changed by increasing or decreasing the level of brake fluid.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 (+) - 2 (E)	Brake fluid level warning switch OFF (Float up)	1.9 to 2.1 kΩ
   1 (+) - 2 (E)	Brake fluid level warning switch ON (Float down)	Below 1 Ω

   HINT: 

   If there is no problem after finishing the above check, adjust the brake fluid level to the MAX level.

NG → REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY (BRAKE FLUID LEVEL WARNING SWITCH) 

OK: Go to next step 

1. Disconnect the combination meter connector.
   Fig 4: Identifying Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J35-15 (SW) - A16-1 (+)	Always	Below 1 Ω
   J35-15 (SW) - Body ground	Always	10 kΩ or higher
   A16-2 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Perform the Active Test of the combination meter (meter CPU) using the Techstream. Refer to DATA LIST / ACTIVE TEST .
2. Check the combination meter.

   HINT: 

   Reinstall the connectors and restore the vehicle to its prior condition before checking the combination meter.

   OK

   The brake warning light turns on or off in accordance with the Techstream operation.

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to PROBLEM SYMPTOMS TABLE .

NG → See step   17 

OK → See step   13 

1. Turn the engine switch off.
   Fig 5: Inspecting Parking Brake Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the parking brake switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - Body ground	Parking brake switch ON (Switch pin free)	Below 1 Ω
   1 - Body ground	Parking brake switch OFF (Switch pin pushed in)	10 kΩ or higher

   Result

   Result	Proceed to
   OK	A
   NG (for manual transmission)	B
   NG (for automatic transmission)	C

B → See step   16 

C → See step   20 

A: Go to next step 

1. Disconnect the skid control ECU connector.
   Fig 6: Identifying Skid Control ECU And Parking Brake Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   for Manual Transmission 

   for Automatic Transmission 

   Tester Connection	Condition	Specified Condition
   A58-29 (PKB) - J88-1	Always	Below 1 Ω
   A58-29 (PKB) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   A58-29 (PKB) - A25-1	Always	Below 1 Ω
   A58-29 (PKB) - Body ground	Always	10 kΩ or higher

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to PROBLEM SYMPTOMS TABLE .

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   13