DTC C1020-14: Ignition Switch On/Start Position Circuit Short to Ground or Open [11/2023 - ]: Procedure

1. Disconnect the A57 No. 2 skid control ECU (brake actuator assembly) connector.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A57-45 (IG1) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 2 Skid Control ECU (Brake Actuator Assembly))

Result: 

OK 

REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR