DTC C1AA7: Skid Control Buzzer Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM (DSS SIGNAL BUZZER)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.

According to the display on the Techstream, perform the Active Test.

ABS/VSC/TRAC

Tester Display	Test Part	Control Range	Diagnostic Note
DSS Signal Buzzer	Skid control buzzer	ON/OFF	Buzzer can be heard

Skid control buzzer sounds.

Turn the power switch off.

NG → See step 5

OK: Go to next step

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
Refer to REMOVAL [08/2013 - ]

NEXT: Go to next step
CLEAR DTCs
1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes.
4. Clear DTCs.
5. Turn the power switch off.
NEXT: Go to next step
CHECK FOR DTCs (LANE DEPARTURE ALERT)
1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes.
4. Check for DTCs.
  OK
  
  DTC C1AA7 is not output.
5. Turn the power switch off.
NG → See step 6

OK → END
GO TO SKID CONTROL BUZZER CIRCUIT. Refer to Skid Control Buzzer Circuit [08/2013 - ]
REPLACE LANE DEPARTURE WARNING CAMERA. Refer to REMOVAL [08/2013 - ]