Inspection Procedure
NOTE:
When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (See
INITIALIZATION ).
- CHECK STOP LIGHT SWITCH OPERATION
- Check that the stop light comes on when the brake pedal is depressed and turns off when the brake pedal is released.
OK
ILLUMINATION CONDITION CHARTCondition Illumination Condition Brake pedal depressed ON Brake pedal released OFF HINT:
Check the stop light bulb as it may have burnt out.
NG: REPAIR STOP LIGHT CIRCUIT
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND STOP LIGHT SWITCH)
- Disconnect the stop light switch connector and skid control ECU connector.
- Measure the resistance according to the value(s) in the table below.
Resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Specified Condition S39-14 (STP) - S13-1 Below 1 Ω NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
- INSPECT SKID CONTROL ECU (GND TERMINAL)
- Connect the skid control ECU connector.
- Measure the resistance according to the value(s) in the table below.
Resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Specified Condition S38-1 (GND1) - Body ground Below 1 Ω S39-2 (GND2) - Body ground Below 1 Ω S39-1 (GND3) - Body ground Below 1 Ω S40-2 (GND4) - Body ground Below 1 Ω S40-1 (GND5) - Body ground Below 1 Ω S41-4 (GND6) - Body ground Below 1 Ω Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- INSPECT STOP LIGHT SWITCH ASSEMBLY
- Disconnect the stop light switch assembly connector.
- Measure the resistance according to the value(s) in the table below.
Resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTSwitch Condition Tester Connection Specified Condition Switch pin free 1 - 2 Below 1 Ω Switch pin pushed in 1 - 2 10 kΩ or higher NG: REPLACE STOP LIGHT SWITCH ASSEMBLY
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
- RECONFIRM DTC
- Clear the DTC (See DTC CHECK / CLEAR ).
- Turn the ignition switch on.
- Depress the brake pedal several times to test the stop light circuit.
- Check that the same DTC is recorded (See
DTC CHECK / CLEAR ).
HINT:
Reinstall the sensors, connectors, etc. and store the previous vehicle conditions before rechecking for DTCs.
Result
RESULT CHARTCondition Proceed To DTC is not output A DTC is output B B: REPLACE SKID CONTROL ECU
A: END