Inspection Procedure

1. Check for DTCs (See DTC CHECK/CLEAR  ).

   Result 

   RESULT REFERENCE
   
   

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

B: REPAIR CIRCUIT INDICATED BY OUTPUT DTC  (See DIAGNOSTIC TROUBLE CODE CHART  )

A: Go to Next Step 

1. Check the skid control ECU connector connection.

   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 

NG: GO TO CHARGING SYSTEM (ON-VEHICLE INSPECTION)  (See ON-VEHICLE INSPECTION )

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. Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.

   OK: "CAN Bus Check" indicates no malfunctions in CAN communication. 

NG: GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

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. Check for DTCs (See HOW TO PROCEED WITH TROUBLESHOOTING ).

   Result 

   RESULT REFERENCE
   
   

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

B: GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)  (See DIAGNOSTIC TROUBLE CODE CHART )

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: Body Electrical / Combination Meter / Active Test.
5. Check the condition of the brake warning light by operating the Techstream.

   Combination Meter 

   ACTIVE TEST - COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicat. Lamp Brake	Brake Warning Light	Warning light ON/OFF	-

   OK: The warning light turns on when operating the Techstream. 

NG: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

OK: Go to Next Step 

1. Disconnect the A24 skid control ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   A24-46 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 1: Identifying Skid Control ECU (IG1 Terminal)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the A24 and A25 skid control ECU connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A24-1 (GND1) - Body ground	Always	Below 1 Ω
   A24-32 (GND2) - Body ground	Always	Below 1 Ω
   A25-4 (GND3) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying Skid Control ECU (GND Terminal)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the E53 parking brake switch connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   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

NG: REPLACE PARKING BRAKE SWITCH ASSEMBLY  (See REMOVAL )

Fig 3: Inspecting Parking Brake Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

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

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A24-28 (PKB) - E53-1	Always	Below 1 Ω
   A24-28 (PKB) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 4: Identifying A24 Skid Control ECU And E53 Parking Brake Switch Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )