DTC C1AA7: Skid Control Buzzer Circuit [12/2013 - 11/2016]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/ Dynamic Radar Cruise Control System	A
   w/o Dynamic Radar Cruise Control System	B

Result:  2

B 

See step  5

Result:  1

A 

See step  2

1. Remove the skid control buzzer assembly.

   Refer to REMOVAL [12/2013 - 11/2016]

2. Inspect the skid control buzzer assembly.

   Refer to INSPECTION [12/2013 - 11/2016]

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE SKID CONTROL BUZZER ASSEMBLY. Refer to  REMOVAL [12/2013 - 11/2016] 

Result:  1

OK 

See step  3

1. Disconnect the A59 skid control buzzer assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Skid Control Buzzer Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A59-2 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V
   A59-2 (IG1) - Body ground	Engine switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - BATTERY) 

Result:  1

OK 

See step  4

1. Disconnect the A59 skid control buzzer assembly connector.
2. Disconnect the S4 lane departure warning camera connector.
3. Disconnect the A3 millimeter wave radar sensor assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A59-1 (BZ) - S4-8 (BZ)	Always	Below 1 Ω
   A59-1 (BZ) or S4-8 (BZ) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE LANE DEPARTURE WARNING CAMERA. Refer to  REMOVAL [12/2013 - 11/2016] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - LANE DEPARTURE WARNING CAMERA) 

1. Remove the lane departure warning buzzer.

   Refer to REMOVAL [12/2013 - 11/2016]

2. Inspect the lane departure warning buzzer.

   Refer to INSPECTION [12/2013 - 11/2016]

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE LANE DEPARTURE WARNING BUZZER. Refer to  REMOVAL [12/2013 - 11/2016] 

Result:  1

OK 

See step  6

1. Disconnect the A59 lane departure warning buzzer connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Lane Departure Warning Buzzer)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A59-2 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V
   A59-2 (IG1) - Body ground	Engine switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (LANE DEPARTURE WARNING BUZZER - BATTERY) 

Result:  1

OK 

See step  7

1. Disconnect the A59 lane departure warning buzzer connector.
2. Disconnect the S4 lane departure warning camera connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A59-1 (BZ) - S4-8 (BZ)	Always	Below 1 Ω
   A59-1 (BZ) or S4-8 (BZ) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE LANE DEPARTURE WARNING CAMERA. Refer to  REMOVAL [12/2013 - 11/2016] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (LANE DEPARTURE WARNING BUZZER - LANE DEPARTURE WARNING CAMERA)