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

1. Disconnect the H65 skid control buzzer assembly connector.
2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H65-2 (IG1) - Body ground	Power switch on (IG)	11 to 14 V

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

4. Turn the power switch off.
5. Reconnect the H65 skid control buzzer assembly connector.

NG → CHECK POWER SOURCE CIRCUIT 

OK: Go to next step 

1. Remove the skid control buzzer assembly. Refer to REMOVAL [08/2013 - ] .
2. Connect a negative (-) lead from the auxiliary battery to terminal 1 (BZ), and a positive (+) lead to terminal 2 (IG1) of the skid control buzzer assembly, and then check that the buzzer sounds.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   The skid control buzzer assembly sounds.

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   *a	Component without harness connected (Skid Control Buzzer Assembly)

3. Reinstall the skid control buzzer assembly.

NG → See step   5 

OK: Go to next step 

1. Disconnect the T12 lane departure warning camera connector.
2. Disconnect the H65 skid control buzzer assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   T12-8 (BZ) - H65-1 (BZ)	Always	Below 1 Ω
   T12-8 (BZ) or H65-1 (BZ) - Body ground	Always	10 kΩ or higher

4. Reconnect the H65 skid control buzzer assembly connector.
5. Reconnect the T12 lane departure warning camera connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4