Inspection Procedure

1. Make sure that there is no looseness at the locking part and the connecting part of the connector
2. Disconnect the brake actuator connector
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   13 (SM1+) - 14 (SM1-)	Always	8.1 to 9.1 a at 25°C (77°F)
   14 (SM1-) - Body ground	Always	10 kΩ or higher
   15 (SM2+) -16 (SM2-)	Always	8.1 to 9 1 a at 25°C (77°F)
   16 (SM2-) - Body ground	Always	10 kΩ or higher

Fig 1: Identifying Brake Actuator Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL  )

OK: Go to next step 

1. Make sure that there is no looseness at the locking part and the connecting part of the connector
2. Disconnect the skid control ECU connector
3. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J78-25 (SM1+) - A13-13 (SM1+)	Always	Below 1 Ω
   J78-25 (SM1+) - Body ground	Always	10 kΩ or higher
   J78-12 (SM1-) - A13-14 (SM1-)	Always	Below 1 Ω
   J78-12 (SM1-) - Body ground	Always	10 kΩ or higher
   J78-11 (SM2+) - A13-15 (SM2+)	Always	Below 1 Ω
   J78-11 (SM2+) - Body ground	Always	10 kΩ or higher
   J78-24 (SM2-) - A13-16 (SM2-)	Always	Below 1 Ω
   J78-24 (SM2-) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Harness And Connector (Skid Control ECU - Brake Actuator)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the skid control ECU connector and the brake actuator connector
2. Clear the DTCs (See DTC CHECK / CLEAR  )
3. Start the engine
4. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
5. Check if the same DTC is recorded (See DTC CHECK / CLEAR  )

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC (C1225/25) is not output	A
   DTC (C1225/25) IS output	B

   HINT:

   • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the engine switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
   • If the normal system code is output (no trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU and/or brake actuator assembly Make sure that no DTCs are output.
   • If any DTCs are output while jiggling a connector or wire harness of the skid control ECU and/or brake actuator assembly, inspect and repair the connector or wire harness
   • It is suspected that the DTCs were output due to a bad connection of the connector terminal.

B: REPLACE SKID CONTROL ECU  (See REMOVAL  )

A: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See DIAGNOSIS SYSTEM  )