Skid Control ECU Communication Stop Mode: Procedure

1. Turn the ignition switch off.
   Fig 1: Identifying Skid Control ECU A38 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector: (to Skid Control ECU)

2. Disconnect the skid control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A38-25 (CANH) - A38-14 (CANL)	Ignition switch off	54 to 69 Ω

NG → REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU BRANCH WIRE) 

OK: Go to next step 

1. Disconnect the skid control ECU connector.
   Fig 2: Identifying Skid Control ECU A38 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector: (to Skid Control ECU)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A38-1 (GND1) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A38-34 (IG1) - Body ground	Ignition switch ON	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menu items: Chassis / ABS/VSC/TRC / DTC.
5. Read the DTC.

   OK

   DTC C1241 is not output.

   Result

   Result	Proceed to
   OK	A
   NG	B

B → See step   5 

A → See step   4