When DTC C1425 and/or C1426 is output together with DTC C1422, inspect and repair the trouble areas indicated by DTC
C1425 and/or C1426 first See: C1425, or See: C1426).
PROCEDURE
1. CHECK STOP LIGHT OPERATION
(a) Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released.
OK:
NG -- INSPECT STOP LIGHT CIRCUIT See: Lighting and Horns/Testing and Inspection/Symptom Related Diagnostic
Procedures/Exterior Lighting System
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Select the Data List on the Techstream See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Data List / Active Test.
ABS/VSC/TRAC
(d) Check that the stop light condition observed on the Techstream changes according to brake pedal operation.
OK:
The Techstream displays ON or OFF according to brake pedal operation.
NG -- INSPECT SKID CONTROL ECU (STP1 TERMINAL)
OK -- Continue to next step.
3. CHECK BRAKE PEDAL AND STOP LIGHT SWITCH INSTALLATION
(a) Turn the engine switch off.
(b) Check the brake pedal height and stop light switch installation See: Brakes and Traction Control/Brake Pedal Assy/Service and
Repair/Removal and Replacement/Installation.
OK:
The brake pedal height and stop light switch installation are normal.
NG -- ADJUST BRAKE PEDAL OR STOP LIGHT SWITCH See: Brakes and Traction Control/Brake Pedal Assy/Adjustments
OK -- Continue to next step.
4. RECONFIRM DTC
(a) Clear the DTCs See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Reading and
Clearing Diagnostic Trouble Codes.
(b) Start the engine.
(c) Drive the vehicle at a speed of 40 km/h (25 mph) or more and perform braking test (decelerate the vehicle by depressing the brake
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