C1176
C1176 STOP LAMP SW2
Description
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. PRECONDITIONING
If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn the ignition switch OFF
and wait at least 10 seconds before conducting the next test.
- GO TO 2.
2. DTC REPRODUCTION PROCEDURE
1.Turn the ignition switch OFF to ON.
2.Perform self-diagnosis for "ABS" with CONSULT.
Is DTC "C1176" detected?
YES- Proceed to diagnosis procedure. .
NO- INSPECTION END
Diagnosis Procedure
NOTE:
DTC "C1176" may be detected when the brake pedal and the accelerator pedal are simultaneously depressed for 1 minute or more while driving the vehicle. This is not a malfunction.
1. INTERVIEW FROM THE CUSTOMER
Check if the brake pedal and the accelerator pedal are simultaneously depressed for 1 minute or more while driving the vehicle.
Is there such a history?
YES- GO TO 2.
NO- GO TO 3.
2. PERFORM SELF-DIAGNOSIS
1.Erase self-diagnosis result for "ABS" with CONSULT.
2.Turn the ignition switch OFF, and wait 10 seconds or more.
3.Start the engine.
CAUTION:
Never start the vehicle.
4.Depress the brake pedal several times.
5.Perform self-diagnosis for "ABS" with CONSULT.
Is DTC "C1176" detected?
YES- GO TO 3.
NO- INSPECTION END
3. CHECK ASCD BRAKE SWITCH CLEARANCE
1.Turn the ignition switch OFF.
2.Check ASCD brake switch clearance. Adjustments.
Is the inspection result normal?
YES- GO TO 5.
NO- Adjust ASCD brake switch clearance. Adjustments. GO TO 4.
4. CHECK DATA MONITOR (2)
1.Erase self-diagnosis result for "ABS" with CONSULT.
2.Turn the ignition switch OFF, and wait 10 seconds or more.
3.Start the engine.
CAUTION:
Never start the vehicle.
4.Select "ABS", "DATA MONITOR" and "STOP LAMP SW2" according to this order with CONSULT. Check that data monitor displays "On" or "Off" when brake pedal is depress or release. VDC/TCS/ABS Actuator And Electric Unit (Control Unit).
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 5.
5. CHECK ASCD BRAKE SWITCH
Check ASCD brake switch. .
Is the inspection result normal?
YES- GO TO 7.
NO- Replace ASCD brake switch. Exploded View. GO TO 6.
6. CHECK DATA MONITOR (3)
1.Erase self-diagnosis result for "ABS" with CONSULT.
2.Turn the ignition switch OFF, and wait 10 seconds or more.
3.Start the engine.
CAUTION:
Never start the vehicle.
4.Select "ABS", "DATA MONITOR" and "STOP LAMP SW2" according to this order with CONSULT. Check that data monitor displays "On" or "Off" when brake pedal is depress or release. VDC/TCS/ABS Actuator And Electric Unit (Control Unit).
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 7.
7. CHECK CONNECTOR AND TERMINAL
1.Turn the ignition switch OFF.
2.Disconnect ABS actuator and electric unit (control unit) harness connector.
3.Check ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
4.Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
5.Disconnect ASCD brake switch harness connector.
6.Check ASCD brake switch harness connector for disconnection or looseness.
7.Check ASCD brake switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- GO TO 9.
NO- Repair or replace error-detected parts. GO TO 8.
8. CHECK DATA MONITOR (4)
1.Connect ABS actuator and electric unit (control unit) harness connector.
2.Connect ASCD brake switch harness connector.
3.Erase self-diagnosis result for "ABS" with CONSULT.
4.Turn the ignition switch OFF, and wait 10 seconds or more.
5.Start the engine.
CAUTION:
Never start the vehicle.
6.Select "ABS", "DATA MONITOR" and "STOP LAMP SW2" according to this order with CONSULT. Check that data monitor displays "On" or "Off" when brake pedal is depress or release. VDC/TCS/ABS Actuator And Electric Unit (Control Unit).
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 9.
9. CHECK ASCD BRAKE SWITCH CIRCUIT (1)
1.Turn the ignition switch OFF.
2.Disconnect ABS actuator and electric unit (control unit) harness connector.
3.Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
4.Turn the ignition switch ON.
5.Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). VDC/TCS/ABS.
NO- Repair or replace error-detected parts. GO TO 10.
10. CHECK ASCD BRAKE SWITCH CIRCUIT (2)
1.Turn the ignition switch OFF.
2.Disconnect ASCD brake switch harness connector.
3.Check continuity between ABS actuator and electric unit (control unit) harness connector and ASCD
brake switch harness connector.
4.Check continuity between ABS actuator and electric unit (control unit) harness connector and the ground.
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). VDC/TCS/ABS.
NO- Repair or replace error-detected parts. GO TO 11.
11. CHECK DATA MONITOR (5)
1.Connect ABS actuator and electric unit (control unit) harness connector.
2.Connect ASCD brake switch harness connector.
3.Erase self-diagnosis result for "ABS" with CONSULT.
4.Turn the ignition switch OFF, and wait 10 seconds or more.
5.Start the engine.
CAUTION:
Never start the vehicle.
6.Select "ABS", "DATA MONITOR" and "STOP LAMP SW2" according to this order with CONSULT. Check that data monitor displays "On" or "Off" when brake pedal is depress or release. VDC/TCS/ABS Actuator And Electric Unit (Control Unit).
Is the inspection result normal?
YES- INSPECTION END
NO- Replace ABS actuator and electric unit (control unit). VDC/TCS/ABS.
Component Inspection
1. CHECK ASCD BRAKE SWITCH
1.Turn the ignition switch OFF.
2.Disconnect ASCD brake switch connector.
3.Check continuity between ASCD brake switch connector terminals.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace ASCD brake switch. Exploded View.
Special Repair Requirement
1. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit) or steering angle sensor and removing steering angle sensor. Refer to BRC76, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement".
- END