DTC C146E: Open in ABS Solenoid Relay Circuit; DTC C146F: Short in ABS Solenoid Relay Circuit [08/2019 - ]: Procedure

1. Disconnect the A6 skid control ECU connector.
2. 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
   A6-31 (+BS) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Disconnect the A6 and A7 skid control ECU connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A6-1 (GND1) - Body ground	Always	Below 1 Ω
   A6-32 (GND2) - Body ground	Always	Below 1 Ω
   A7-4 (GND3) - Body ground	Always	Below 1 Ω

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

HINT: 

These codes are stored when a problem is detected in the master cylinder solenoid.

The solenoid relay is in the master cylinder solenoid.

Therefore, solenoid relay circuit inspections and relay unit inspections cannot be performed. Be sure to check if any DTC is output before replacing the master cylinder solenoid.

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
2. Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.
3. Check if the same DTCs are output (Refer to DTC CHECK / CLEAR [08/2019 - ] ).

   HINT: 

   Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

   RESULT
   
   

   Result	Proceed to
   DTC is output	A
   DTC is not output	B

Result: 

A 

REPLACE MASTER CYLINDER SOLENOID 

(Refer to DISASSEMBLY [08/2015 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )