DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P0571

DESCRIPTION

Detection condition 1:

• When the brake pedal is depressed, the stop light switch assembly sends a signal to the ECM. When the ECM receives this signal, it cancels the dynamic radar cruise control. The fail-safe function operates to enable normal driving even if there is a malfunction in the stop light signal circuit. The cancellation condition occurs when voltage is applied to terminal STP. When the brake is applied, voltage is normally applied to terminal STP of the ECM through the STOP fuse and the stop light switch assembly, and the ECM turns the dynamic radar cruise control system off.

Detection condition 2:

• The ECM receives the brake demand signal from the driving support ECU assembly and transmits it to the skid control ECU. The skid control ECU receives a signal from the ECM and operates the skid control ECU. The skid control ECU operates the brake actuator assembly and at the same time illuminates the stop light by operating the stop light switch assembly.

*1: for Vacuum Brake Booster

*2: for Hydraulic Brake Booster

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK FOR DTCs (ENGINE CONTROL SYSTEM)

   Tech Tips

   Dynamic radar cruise control system DTC P0571 may be stored due to a malfunction in the engine control system. Therefore it is necessary to check for and troubleshoot engine control system DTCs first.

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Check for DTCs.

      for 1GR-FE: Click here

      for 1KD-FTV: Click here

      for 1GD-FTV: Click here

      for 1GD-FTV (w/ Urea SCR System): Click here

      for 2TR-FE: Click here

      Result
      Result Proceed to Engine control system DTCs are not output. A Engine control system DTCs are output. B

   
   

   B

   GO TO ENGINE CONTROL SYSTEM for 1GR-FE: Click here GO TO ENGINE CONTROL SYSTEM for 1KD-FTV: Click here GO TO ENGINE CONTROL SYSTEM for 1GD-FTV: Click here GO TO ENGINE CONTROL SYSTEM for 1GD-FTV (w/ Urea SCR System): Click here GO TO ENGINE CONTROL SYSTEM for 2TR-FE: Click here

   A

2. CHECK TERMINAL VOLTAGE (STP, STPO AND STP2 TERMINAL)

   
   

   1. for Vacuum brake booster

      
      

      1. Turn the ignition switch off.

      2. 

         *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

         Disconnect the skid control ECU (brake actuator assembly) connector.

      3. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A6-22 (STP2) - Body ground Brake pedal depressed 11 to 14 V Brake pedal released Below 1.5 V A6-31 (STPO) - Body ground Ignition switch ON 11 to 14 V A6-2 (STP) - Body ground Brake pedal depressed 11 to 14 V Brake pedal released Below 1.5 V

   2. for Hydraulic brake booster

      
      

      1. Turn the ignition switch off.

      2. 

         *a	Front view of wire harness connector (to Skid Control ECU (Master Cylinder Solenoid))

         Disconnect the skid control ECU (master cylinder solenoid) connector.

      3. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A7-45 (STP2) - Body ground Brake pedal depressed 11 to 14 V Brake pedal released Below 1.5 V A7-16 (STPO) - Body ground Ignition switch ON 11 to 14 V A7-7 (STP) - Body ground Brake pedal depressed 11 to 14 V Brake pedal released Below 1.5 V

      Result
      Result Proceed to All terminal voltage is normal A Only STP2 terminal voltage abnormal B Only STPO terminal voltage abnormal C Only STP terminal voltage abnormal D STPO terminal and STP terminal voltage abnormal E

   
   

   B

   INSPECT SKID CONTROL ECU Click here

   C

   CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Click here

   D

   CHECK TERMINAL VOLTAGE (STP TERMINAL) Click here

   E

   CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Click here

   A

3. PERFORM ACTIVE TEST USING GTS (STOP LIGHT RELAY)

   
   

   1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

   2. Perform "Active Test" according to the display on the GTS.

      Chassis > ABS/VSC/TRC > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Stop Light Relay	Stop light control relay (stop light switch assembly)	Relay ON/OFF	Stop lights come on Vehicle condition: Vehicle stopped

      OK
      Stop light turns ON/OFF in response to the GTS operation

      Result
      Proceed to OK NG

   
   

   NG

   INSPECT SKID CONTROL ECU Click here

   OK

4. CHECK FOR DTC

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Clear the DTCs.

      Click here

   4. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

   5. Perform "Active Test" according to the display on the GTS.

      Chassis > ABS/VSC/TRC > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Stop Light Relay	Stop light control relay (stop light switch assembly)	Relay ON/OFF	Stop lights come on Vehicle condition: Vehicle stopped

   6. Check for DTCs.

      Click here

      Result
      Result Proceed to DTC P0571 is output A DTC P0571 is not output B

   
   

   A

   REPLACE SKID CONTROL ECU for Vacuum Brake Booster: Click here REPLACE SKID CONTROL ECU for Hydraulic Brake Booster (for LHD): Click here REPLACE SKID CONTROL ECU for Hydraulic Brake Booster (for RHD): Click here

   B

   USE SIMULATION METHOD TO CHECK Click here

5. INSPECT SKID CONTROL ECU

   
   

   1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

   2. Perform "Active Test" according to the display on the GTS.

      Chassis > ABS/VSC/TRC > Active Test

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Stop Light Relay	Stop light control relay (stop light switch assembly)	Relay ON/OFF	Stop lights come on Vehicle condition: Vehicle stopped

   3. 

      *a	Component with harness connected (Stop Light Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition A99-4 (ACC) - Body ground Active test is ON Below 1.5 V

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

   NG

   REPLACE SKID CONTROL ECU for Vacuum Brake Booster: Click here REPLACE SKID CONTROL ECU for Hydraulic Brake Booster (for LHD): Click here REPLACE SKID CONTROL ECU for Hydraulic Brake Booster (for RHD): Click here

6. INSPECT SKID CONTROL ECU

   
   

   1. for Vacuum brake booster

      
      

      1. Turn the ignition switch off.

      2. 

         *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

         Disconnect the skid control ECU (brake actuator assembly) connector.

      3. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal released Below 1.5 V

   2. for Hydraulic brake booster

      
      

      1. Turn the ignition switch off.

      2. 

         *a	Front view of wire harness connector (to Skid Control ECU (Master Cylinder Solenoid))

         Disconnect the skid control ECU (master cylinder solenoid) connector.

      3. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal released Below 1.5 V

      Result
      Proceed to OK NG

   
   

   NG

   CHECK STOP LIGHT SWITCH ASSEMBLY Click here

   OK

7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM)

   
   

   1. for Vacuum Brake Booster

      
      

      1. Turn the ignition switch off.

      2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

      3. Disconnect the G180 ECM connector.

      4. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A6-22 (STP2) or G180-10 (STP) - Body ground Brake pedal depressed 11 to 14 V

   2. for Hydraulic Brake Booster

      
      

      1. Turn the ignition switch off.

      2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

      3. Disconnect the G56*1, G57*2 or G185*3 ECM connector.

         
         

         • *1: for 1GR-FE

         • *2: for 1KD-FTV

         • *3: for 1GD-FTV

      4. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A7-45 (STP2) or G56-35 (STP)*1 - Body ground Brake pedal depressed 11 to 14 V A7-45 (STP2) or G57-8 (STP)*2 - Body ground Brake pedal depressed 11 to 14 V A7-45 (STP2) or G185-13 (STP)*3 - Body ground Brake pedal depressed 11 to 14 V

         
         

         • *1: for 1GR-FE

         • *2: for 1KD-FTV

         • *3: for 1GD-FTV

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE ECM for 1GR-FE: Click here REPLACE ECM for 1KD-FTV: Click here REPLACE ECM for 1GD-FTV: Click here REPLACE ECM for 2TR-FE: Click here

   NG

8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SHIFT LOCK CONTROL UNIT)

   
   

   1. for Vacuum Brake Booster

      
      

      1. Turn the ignition switch off.

      2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

      3. Disconnect the G180 ECM connector.

      4. Disconnect the G45*1 or G150*2 shift lock control unit (transmission floor shift assembly) connector.

         
         

         • *1: w/ Entry and Start System

         • *2: w/o Entry and Start System

      5. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A6-22 (STP2) or G45-6 (STP)*1 - Body ground Brake pedal depressed 11 to 14 V A6-22 (STP2) or G150-4 (STP)*2 - Body ground Brake pedal depressed 11 to 14 V

         
         

         • *1: w/ Entry and Start System

         • *2: w/o Entry and Start System

   2. for Hydraulic Brake Booster

      
      

      1. Turn the ignition switch off.

      2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

      3. Disconnect the G56*1, G57*2 or G185*3 ECM connector.

         
         

         • *1: for 1GR-FE

         • *2: for 1KD-FTV

         • *3: for 1GD-FTV

      4. Disconnect the G45*1 or G150*2 shift lock control unit (transmission floor shift assembly) connector.

         
         

         • *1: w/ Entry and Start System

         • *2: w/o Entry and Start System

      5. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A7-45 (STP2) or G45-6 (STP)*1 - Body ground Brake pedal depressed 11 to 14 V A7-45 (STP2) or G150-4 (STP)*2 - Body ground Brake pedal depressed 11 to 14 V

         
         

         • *1: w/ Entry and Start System

         • *2: w/o Entry and Start System

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE REPLACE SHIFT LOCK CONTROL UNIT for A750F: Click here REPLACE REPLACE SHIFT LOCK CONTROL UNIT for AC60F: Click here

   NG

9. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

   
   

   1. for Vacuum Brake Booster

      
      

      1. Turn the ignition switch off.

      2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

      3. Disconnect the G180 ECM connector.

      4. Disconnect the G45*1 or G150*2 shift lock control unit (transmission floor shift assembly) connector.

         
         

         • *1: w/ Entry and Start System

         • *2: w/o Entry and Start System

      5. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

      6. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A6-22 (STP2) or G213-2 (STP1) - Body ground Brake pedal depressed 11 to 14 V

   2. for Hydraulic Brake Booster

      
      

      1. Turn the ignition switch off.

      2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

      3. Disconnect the G56*1, G57*2 or G185*3 ECM connector.

         
         

         • *1: for 1GR-FE

         • *2: for 1KD-FTV

         • *3: for 1GD-FTV

      4. Disconnect the G45*1 or G150*2 shift lock control unit (transmission floor shift assembly) connector.

         
         

         • *1: w/ Entry and Start System

         • *2: w/o Entry and Start System

      5. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

      6. Measure the voltage according to the value(s) in the table below.

         Standard Voltage
         Tester Connection Condition Specified Condition A7-45 (STP2) or G213-2 (STP1) - Body ground Brake pedal depressed 11 to 14 V

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   NG

10. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the G180 ECM connector.

       4. Disconnect the G45*1 or G150*2 shift lock control unit (transmission floor shift assembly) connector.

          
          

          • *1: w/ Entry and Start System

          • *2: w/o Entry and Start System

       5. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

       6. Disconnect the A99 stop light switch assembly connector.

       7. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-22 (STP2) or A99-3 (L) - Body ground Brake pedal depressed 11 to 14 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the G56*1, G57*2 or G185*3 ECM connector.

          
          

          • *1: for 1GR-FE

          • *2: for 1KD-FTV

          • *3: for 1GD-FTV

       4. Disconnect the G45*1 or G150*2 shift lock control unit (transmission floor shift assembly) connector.

          
          

          • *1: w/ Entry and Start System

          • *2: w/o Entry and Start System

       5. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

       6. Disconnect the A99 stop light switch assembly connector.

       7. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-45 (STP2) or A99-3 (L) - Body ground Brake pedal depressed 11 to 14 V

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

11. CHECK STOP LIGHT SWITCH ASSEMBLY

    
    

    1. Remove the stop light switch assembly.

       Click here

    2. Inspect the stop light switch assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

12. CHECK STOP LIGHT SWITCH ASSEMBLY

    
    

    1. Remove the stop light switch assembly.

       Click here

    2. Inspect the stop light switch assembly.

       Click here

       Result
       Proceed to OK NG

    
    

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

13. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the A99 stop light switch assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A6-31 (STPO) - A99-4 (ACC) Always Below 1 Ω

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the A99 stop light switch assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A7-16 (STPO) - A99-4 (ACC) Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

14. CHECK STOP LIGHT SWITCH ASSEMBLY

    
    

    1. Turn the ignition switch off.

    2. 

       *a	Front view of wire harness connector (to Stop Light Switch Assembly)

       Disconnect the stop light switch assembly connector.

    3. Measure the voltage according to the value(s) in the table below.

       Standard Voltage
       Tester Connection Condition Specified Condition A99-6 (B) - Body ground Ignition switch ON 11 to 14 V A99-7 (B) - Body ground Always 11 to 14 V

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

       Standard Resistance
       Tester Connection Condition Specified Condition A99-2 (GND) -Body ground Always Below 1 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

15. CHECK TERMINAL VOLTAGE (STP TERMINAL)

    
    

    1. for Vacuum brake booster

       
       

       1. Turn the ignition switch off.

       2. 

          *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

          Disconnect the skid control ECU (brake actuator assembly) connector.

       3. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal released Below 1.5 V

    2. for Hydraulic brake booster

       
       

       1. Turn the ignition switch off.

       2. 

          *a	Front view of wire harness connector (to Skid Control ECU (Master Cylinder Solenoid))

          Disconnect the skid control ECU (master cylinder solenoid) connector.

       3. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal released Below 1.5 V

       Result
       Proceed to OK NG

    
    

    NG

    CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Click here

    OK

16. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR COMBINATION LIGHT ASSEMBLY LH)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal depressed 11 to 14 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal depressed 11 to 14 V

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH Click here

    NG

17. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR COMBINATION LIGHT ASSEMBLY RH)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       5. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal depressed 11 to 14 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       5. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal depressed 11 to 14 V

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH Click here

    NG

18. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - CENTER STOP LIGHT ASSEMBLY)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       5. Disconnect the Z1 center stop light assembly connector.

       6. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal depressed 11 to 14 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       5. Disconnect the Z1 center stop light assembly connector.

       6. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal depressed 11 to 14 V

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE CENTER STOP LIGHT ASSEMBLY Click here

    NG

19. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       5. Disconnect the Z1 center stop light assembly connector.

       6. Disconnect the A99 stop light switch assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A99-1 (OUT) - A6-2 (STP) Always Below 1 Ω A99-1 (OUT) or A6-2 (STP) - Body ground Always 10 kΩ or higher

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the R22 rear combination light assembly LH connector.

       4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       5. Disconnect the Z1 center stop light assembly connector.

       6. Disconnect the A99 stop light switch assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A99-1 (OUT) - A7-7 (STP) Always Below 1 Ω A99-1 (OUT) or A7-7 (STP) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

20. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal released Below 1.5 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal released Below 1.5 V

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

21. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR COMBINATION LIGHT ASSEMBLY LH)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Disconnect the R22 rear combination light assembly LH connector.

       5. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal released Below 1.5 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Disconnect the R22 rear combination light assembly LH connector.

       5. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal released Below 1.5 V

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH Click here

    NG

22. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR COMBINATION LIGHT ASSEMBLY RH)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Disconnect the R22 rear combination light assembly LH connector.

       5. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       6. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal released Below 1.5 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Disconnect the R22 rear combination light assembly LH connector.

       5. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       6. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal released Below 1.5 V

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH Click here

    NG

23. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - CENTER STOP LIGHT ASSEMBLY)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Disconnect the R22 rear combination light assembly LH connector.

       5. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       6. Disconnect the Z1 center stop light assembly connector.

       7. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A6-2 (STP) - Body ground Brake pedal released Below 1.5 V

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the A99 stop light switch assembly connector.

       4. Disconnect the R22 rear combination light assembly LH connector.

       5. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.

          
          

          • *1: for 3 Door

          • *2: for 5 Door

       6. Disconnect the Z1 center stop light assembly connector.

       7. Measure the voltage according to the value(s) in the table below.

          Standard Voltage
          Tester Connection Condition Specified Condition A7-7 (STP) - Body ground Brake pedal released Below 1.5 V

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE CENTER STOP LIGHT ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

24. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY)

    
    

    1. for Vacuum Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

       3. Disconnect the A99 stop light switch assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A6-31 (STPO) or A99-4 (ACC) - Body ground Always 10 kΩ or higher

    2. for Hydraulic Brake Booster

       
       

       1. Turn the ignition switch off.

       2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

       3. Disconnect the A99 stop light switch assembly connector.

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

          Standard Resistance
          Tester Connection Condition Specified Condition A7-16 (STPO) or A99-4 (ACC) - Body ground Always 10 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR