Skid Control ECU Communication Stop Mode [11/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON (IG).
3. Turn the Techstream on.
4. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

   OK

   DTC C1241 is not output.

Result: 

NG 

REFER TO DIAGNOSIS PROCEDURES INDICATED BY OUTPUT DTC 

Refer to DTC C1241/41: Low Battery Positive Voltage; DTC C1242/42: Open in IG1 / IG2 Power Source Circuit [11/2015 - ] )

Result: 

OK 

See step  2

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the brake booster with master cylinder assembly (Skid Control ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A41-37 (CA1H) - A41-38 (CA1L)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Brake Booster with Master Cylinder Assembly (Skid Control ECU))

Result: 

A 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 

Refer to REMOVAL [11/2015 - ] )

Result: 

B 

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)