DTC C146E: Open in ABS Solenoid Relay Circuit [08/2015 - ]: Procedure

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A49-25 (+BS) - Body ground*1 A94-25 (+BS) - Body ground*2	Always	11 to 14 V

   *1: for 2AR-FE (w/o Dynamic Radar Cruise Control System)

   *2: for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE

   TEXT IN ILLUSTRATION
   
   

   *A	for 2AR-FE (w/o Dynamic Radar Cruise Control System)
   *B	for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE
   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (+BS CIRCUIT) 

OK: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A49-38 (GND1) - Body ground*1 A94-38 (GND1) - Body ground*2	Always	Below 1 Ω

   *1: for 2AR-FE (w/o Dynamic Radar Cruise Control System)

   *2: for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE

   TEXT IN ILLUSTRATION
   
   

   *A	for 2AR-FE (w/o Dynamic Radar Cruise Control System)
   *B	for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE
   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT) 

OK: Go to next step 

HINT: 

This DTC is stored when a problem is identified in the brake actuator assembly.

The solenoid circuits are located in the brake actuator assembly.

Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check if the DTC is output again before replacing the brake actuator assembly.

1. Reconnect the skid control ECU connector.
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2015 - ] .
3. Turn the ignition switch off.
4. Start the engine.
5. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
6. Check if the same DTC is output. Refer to DTC CHECK / CLEAR [08/2015 - ] .

   Result

   Result	Proceed to
   DTC C146E is not output.	A
   DTC C146E is output.	B

   HINT: 

   • The skid control ECU performs self diagnosis of the solenoid circuit after the ignition switch turned to ON.
   • If the normal system code is output (No DTCs are output), slightly jiggle the connectors, wire harnesses, and fuses of the brake actuator assembly.
   • If any DTCs are output while jiggling a connector or wire harness of the skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
   • If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.

B → See step   5 

A → See step   4