Inspection Procedure

HINT:

When C1249/49 is output together with C1380/64, inspect and repair the trouble areas indicated by C1249/49 first.

1. INSPECT STOP FUSE 
   1. Remove the STOP fuse from the main body ECU.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      STOP (10 A) fuse	Always	Below 1 Ω

   Fig 1: Identifying STOP Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE STOP FUSE 

   OK: Go to Next Step 

2. CHECK STOP LIGHT OPERATION 
   1. Install the STOP fuse.
   2. Check that the stop light comes on when the brake pedal is depressed, and goes off when the brake pedal is released.

      OK 

      RESULT CHART
      
      

      Condition	Illumination Condition
      Brake pedal depressed	ON
      Brake pedal released	OFF

   NG: INSPECT STOP LIGHT CIRCUIT 

   OK: Go to Next Step 

3. INSPECT SKID CONTROL ECU (STP1 TERMINAL) 
   1. Disconnect the skid control ECU connector.
   2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      A36-27 (STP1) - Body ground	Stop light switch ON (Brake pedal depressed)	8 to 14 V
      A36-27 (STP1) - Body ground	Stop light switch OFF (Brake pedal released)	Below 1.5 V

   Fig 2: Identifying STP1 Terminal Of Skid Control ECU Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STP1 CIRCUIT) 

   OK: Go to Next Step 

4. INSPECT SKID CONTROL ECU (STP2 TERMINAL) 
   1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      A36-27 (STP1) - A36-21 (STP2)	Always	Below 1 Ω

   Fig 3: Identifying STP1 And STP2 Terminal Of Skid Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STP2 CIRCUIT) 

   OK: Go to Next Step 

5. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (STOP LIGHT CONTROL RELAY) 
   1. Reconnect the skid control ECU connector.
   2. Connect the intelligent tester to the DLC3.
   3. Start the engine.
   4. Select the Active Test mode on the intelligent tester.

      ABS/VSC: 

      ABS/VSC ACTIVE TEST LIST
      
      

      Tester Display	Test Part	Control Range	Diagnostic Note
      STOP LAMP RELAY	Stop light control relay	Relay ON / OFF	Stop light comes on (Does not come on for 5 seconds or more)

   5. Check that the "ON" and "OFF" of the stop light can be shown on the rear combination light by the intelligent tester.

      OK: 

      The stop light turns on or off in accordance with the intelligent tester. 

   OK: Go to step  9

   NG: Go to Next Step 

6. INSPECT STOP LIGHT CONTROL RELAY 
   1. Turn the engine switch off.
   2. Remove the stop light control relay.
   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      3 - 4	Always	Below 1 Ω
      3 - 5	Always	10 kΩ or higher
      3 - 4	When battery positive voltage is applied to terminal 1 and battery negative voltage to terminal 2	10 kΩ or higher
      3 - 5	When battery positive voltage is applied to terminal 1 and battery negative voltage to terminal 2	Below 1 Ω

      Fig 4: Identifying Terminals Stop Light Control Relay

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE STOP LIGHT CONTROL RELAY 

   OK: Go to Next Step 

7. INSPECT ENGINE ROOM RELAY BLOCK (POWER SOURCE TERMINAL) 
   1. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      Stop light control relay terminal 5 - Body ground	Always	8 to 14 V
      Stop light control relay terminal 2 - Body ground	Engine switch on (IG)	8 to 14 V

   Fig 5: Identifying Stop Light Control Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

   OK: Go to Next Step 

8. INSPECT SKID CONTROL ECU (STPO TERMINAL) 
   1. Turn the engine switch off.
   2. Install the stop light control relay.
   3. Disconnect the skid control ECU connector.
   4. Turn the engine switch on (IG).
   5. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      A36-16 (STPO)-Body ground	Engine switch on (IG)	10 to 14 V

   Fig 6: Identifying STPO Terminal Of Skid Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STPO CIRCUIT) 

   OK: Go to Next Step 

9. RECONFIRM DTC 
   1. Turn the engine switch off.
   2. Reconnect the skid control ECU connector.
   3. Clear the DTC (See DTC CHECK / CLEAR  ).
   4. Perform a road test (See ROAD TEST ).
   5. Check if the same DTC is recorded (See DTC CHECK / CLEAR  ).

      Result 

      RESULT CHART
      
      

      Condition	Proceed to
      DTC (C1380/64) is not output	A
      DTC (C1380/64) is output	B

   B: REPLACE BRAKE ACTUATOR ASSEMBLY 

   A: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)