ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1422

DESCRIPTION

Refer to DTCs C1421, C1423 and C1424 (Click here).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   READ VALUE USING GTS (STOP LIGHT SW)

   
   

   1. Turn the ignition switch off.

   2. Connect the GTS to the DLC3.

   3. Turn the ignition switch to ON.

   4. Turn the GTS on.

   5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

      Table 1. ABS/VSC/TRC

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Stop Light SW	Stop light switch / ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   6. Check that the stop light switch condition observed on the GTS changes according to brake pedal operation.

      OK
      The GTS displays ON and OFF according to brake pedal operation.

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK BRAKE PEDAL AND STOP LIGHT SWITCH INSTALLATION

   
   

   1. Turn the ignition switch off.

   2. Check the brake pedal height and stop light switch installation (for LHD:Click here, for RHD:Click here).

      OK
      The brake pedal height and stop light switch installation are normal.

   
   
   • OKClick here
   • NGClick here
3. Click here

   RECONFIRM DTC

   
   

   1. Clear the DTC (Click here).

   2. Turn the ignition switch off.

   3. Start the engine.

   4. Drive the vehicle at a speed of 40 km/h (25 mph) or more and perform a braking test (decelerate the vehicle by depressing the brake pedal).

   5. Check if the same DTC is output (Click here).

      Table 2. Result

      Result	Proceed to
      DTC is not output	A
      DTC is output (for LHD)	B
      DTC is output (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH POWER SOURCE TERMINAL)

   
   

   1. Make sure that there is no looseness in the locking part and connecting part of the connectors.

   2. 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 A30-2 - Body ground Always 11 to 14 V

      Table 3. Text in Illustration

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

   
   
   • OKClick here
   • NGClick here
5. Click here

   INSPECT STOP LIGHT SWITCH

   
   

   1. Remove the stop light switch assembly (Click here).

   2. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 - 2 Switch pin not pushed in Below 1 Ω Switch pin pushed in 10 kΩ or higher

      Table 4. Text in Illustration

      *a	Component without harness connected (Stop Light Switch Assembly)

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK HARNESS AND CONNECTOR (STP TERMINAL)

   
   

   1. Turn the ignition switch off.

   2. 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 Switch Condition Specified Condition A24-7 (STP) - Body ground Brake pedal depressed 8 to 14 V Brake pedal released Below 1.5 V

      Table 5. Text in Illustration

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

      Table 6. Result

      Result	Proceed to
      NG	A
      OK (for LHD)	B
      OK (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
7. Click here

   CHECK FOR INTERMITTENT PROBLEMSClick here

8. Click here

   REPLACE MASTER CYLINDER SOLENOIDClick here

9. Click here

   ADJUST BRAKE PEDAL OR STOP LIGHT SWITCH

10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

11. Click here

    REPLACE STOP LIGHT SWITCH ASSEMBLYClick here

12. Click here

    REPLACE MASTER CYLINDER SOLENOIDClick here