Inspection Procedure

1. Check that all of the following conditions for not illuminating the brake warning light are satisfied.
   1. The ABS warning light is off.
   2. The amount of the brake fluid is between the min. line and max. line of the brake master cylinder reservoir.
   3. The parking brake pedal is fully released.

NEXT: GO TO NEXT STEP. 

1. Check if the DTCs are recorded. (See PRE-CHECK  )

NO: Go to step 3. 

YES: REPAIR CIRCUIT INDICATED BY OUTPUT CODE 

WHEN USING HAND-HELD TESTER: 

1. Connect the hand-held tester to the DLC3.
2. Start the engine.
3. Select the item "BRAKE WARN LIGHT" in the ACTIVE TEST and operate the BRAKE warning light on the hand-held tester.
4. Check that "ON" and "OFF" of the BRAKE warning light can be shown on the combination meter with the hand-held tester.

WHEN NOT USING HAND-HELD TESTER: 

1. Turn the ignition switch off and disconnect the connector S1 from the skid control ECU.
2. Ground the terminal BRL of the skid control ECU.
Fig 1: Identifying Skid Control ECU Connector Terminals (BRK)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Turn the ignition switch to the ON position.
4. Check that the brake warning light goes off.

NG: Go to step   6 . 

OK: Go to next step. 

1. Remove the parking brake switch.
Fig 2: Inspecting Parking Brake Switch Assy
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in PARKING BRAKE SWITCH ASSY RESISTANCE  .

   Standard: 

   PARKING BRAKE SWITCH ASSY RESISTANCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   P6-1 - Ground part	Released	Below 1 Ω
   P6-1 - Ground part	Pushed in	10 kΩ or higher

NG: REPAIR PARKING BRAKE SWITCH ASSY 

OK: Go to next step. 

1. Disconnect the skid control ECU connector S1 and the parking brake switch connector P6.
Fig 3: Checking Harness Or Connector (Skid Control ECU - Parking Brake Switch)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in SKID CONTROL ECU - PARKING BRAKE SWITCH RESISTANCE  .

   Standard: 

   SKID CONTROL ECU - PARKING BRAKE SWITCH RESISTANCE
   
   

   Tester Connection	Specified Condition
   S1-28 (PKB) - P6-1 (PKB)	Below 1 Ω

3. Measure the resistance according to the value(s) in SKID CONTROL ECU - PARKING BRAKE SWITCH - BODY GROUND RESISTANCE  .

   Standard: 

   SKID CONTROL ECU - PARKING BRAKE SWITCH - BODY GROUND RESISTANCE
   
   

   Tester Connection	Specified Condition
   S1-28 (PKB) - Body ground	10 kΩ or higher

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: REPLACE ABS & TRACTION ACTUATOR ASSY (See  REPLACEMENT  ) 

1. Remove the parking brake switch.
Fig 4: Inspecting Parking Brake Switch Assy Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in PARKING BRAKE SWITCH ASSY RESISTANCE  .

   Standard: 

   PARKING BRAKE SWITCH ASSY RESISTANCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   P6-1 - Ground part	Released	Below 1 Ω
   	Pushed in	10 kΩ or higher

NG: REPAIR PARKING BRAKE SWITCH ASSY 

OK: Go to next step. 

1. Disconnect the skid control ECU connector S1 and the parking brake switch connector P6.
Fig 5: Checking Harness Or Connector (Skid Control ECU - Parking Brake Switch)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in SKID CONTROL ECU - PARKING BRAKE SWITCH RESISTANCE  .

   Standard: 

   SKID CONTROL ECU - PARKING BRAKE SWITCH RESISTANCE
   
   

   Tester Connection	Specified Condition
   S1-28 (PKB) - P6-1 (PKB)	Below 1 Ω

3. Measure the resistance according to the value(s) in SKID CONTROL ECU - PARKING BRAKE SWITCH - BODY GROUND RESISTANCE  .

   Standard: 

   SKID CONTROL ECU - PARKING BRAKE SWITCH - BODY GROUND RESISTANCE
   
   

   Tester Connection	Specified Condition
   S1-28 (PKB) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Remove the reservoir tank cap and strainer.
2. Disconnect the brake fluid level warning switch connector B1.
Fig 6: Inspecting Brake Fluid Level Warning Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in BRAKE FLUID LEVEL WARNING SWITCH RESISTANCE  .

   Standard: 

   BRAKE FLUID LEVEL WARNING SWITCH RESISTANCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   (B1-1) - (B1-2)	Float UP	More than 10 kΩ
   	Float DOWN	Less than 1 Ω

NG: REPLACE BRAKE FLUID LEVEL WARNING SWITCH 

OK: Go to next step. 

1. Disconnect the combination meter connector C8 and the brake fluid level warning switch connector B1.
Fig 7: Checking Harness Or Connector (Brake Fluid Level Warning Switch-Combination Meter)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in BRAKE FLUID LEVEL WARNING SWITCH-COMBINATION METER RESISTANCE  .

   Standard: 

   BRAKE FLUID LEVEL WARNING SWITCH-COMBINATION METER RESISTANCE
   
   

   Tester Connection	Specified Condition
   (C8-8) - (B1-1)	Less than 1 Ω

3. Measure the resistance according to the value(s) in BRAKE FLUID LEVEL WARNING SWITCH-COMBINATION METER - BODY GROUND RESISTANCE  .

   Standard: 

   BRAKE FLUID LEVEL WARNING SWITCH-COMBINATION METER - BODY GROUND RESISTANCE
   
   

   Tester Connection	Specified Condition
   (C8-8) - Body ground	More than 10 kΩ

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPAIR OR REPLACE COMBINATION METER ASSY (See  COMBINATION METER ASSY  )