DTC C1315: SMC1 Changeover Solenoid; DTC C1316: SMC2 Changeover Solenoid; DTC C1352: Increasing Pressure Solenoid (FR); DTC C1353: Increasing Pressure Solenoid (FL); DTC C1354: Increasing Pressure Solenoid (RR); DTC C1355: Increasing Pressure Solenoid (RL); DTC C1356: Decreasing Pressure Solenoid (FR); DTC C1357: Decreasing Pressure Solenoid (FL); DTC C1358: Decreasing Pressure Solenoid (RR); DTC C1359: Decreasing Pressure Solenoid (RL) [10/2020 - 10/2023]: Procedure

INSPECT BRAKE ACTUATOR ASSEMBLY

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Component without harness connected
(Brake Actuator Assembly)

Disconnect the A8 brake actuator assembly connector.

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

HINT:

Check the brake actuator assembly when it is cooled down.

Standard Resistance

Tester Connection	Condition	Specified Condition
A8-37 (SMC1) - A8-36 (BS1)	Always	15.3 to 17.3 Ω
A8-37 (SMC1) or A8-36 (BS1) - Body ground	Always	10 kΩ or higher
A8-19 (SMC2) - A8-20 (BS2)	Always	15.3 to 17.3 Ω
A8-19 (SMC2) or A8-20 (BS2) - Body ground	Always	10 kΩ or higher
A8-44 (FRA+) - A8-43 (FRA-)	Always	3.6 to 4.2 Ω
A8-44 (FRA+) or A8-43 (FRA-) - Body ground	Always	10 kΩ or higher
A8-35 (FLA+) - A8-38 (FLA-)	Always	3.6 to 4.2 Ω
A8-35 (FLA+) or A8-38 (FLA-) - Body ground	Always	10 kΩ or higher
A8-39 (RRA+) - A8-40 (RRA-)	Always	3.6 to 4.2 Ω
A8-39 (RRA+) or A8-40 (RRA-) - Body ground	Always	10 kΩ or higher
A8-41 (RLA+) - A8-42 (RLA-)	Always	3.6 to 4.2 Ω
A8-41 (RLA+) or A8-42 (RLA-) - Body ground	Always	10 kΩ or higher
A8-28 (FRR+) - A8-27 (FRR-)	Always	3.6 to 4.2 Ω
A8-28 (FRR+) or A8-27 (FRR-) - Body ground	Always	10 kΩ or higher
A8-21 (FLR+) - A8-22 (FLR-)	Always	3.6 to 4.2 Ω
A8-21 (FLR+) or A8-22 (FLR-) - Body ground	Always	10 kΩ or higher
A8-23 (RRR+) - A8-24 (RRR-)	Always	4.4 to 5.0 Ω
A8-23 (RRR+) or A8-24 (RRR-) - Body ground	Always	10 kΩ or higher
A8-25 (RLR+) - A8-26 (RLR-)	Always	4.4 to 5.0 Ω
A8-25 (RLR+) or A8-26 (RLR-) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

Result:

See step 2

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the A13 and A10 skid control ECU assembly connectors.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A10-26 (RLA+) - A8-41 (RLA+)	Always	Below 1 Ω
A10-26 (RLA+) or A8-41 (RLA+) - Body ground	Always	10 kΩ or higher
A10-27 (RLA-) - A8-42 (RLA-)	Always	Below 1 Ω
A10-27 (RLA-) or A8-42 (RLA-) - Body ground	Always	10 kΩ or higher
A13-26 (RRA+) - A8-39 (RRA+)	Always	Below 1 Ω
A13-26 (RRA+) or A8-39 (RRA+) - Body ground	Always	10 kΩ or higher
A13-27 (RRA-) - A8-40 (RRA-)	Always	Below 1 Ω
A13-27 (RRA-) or A8-40 (RRA-) - Body ground	Always	10 kΩ or higher
A13-19 (FLA+) - A8-35 (FLA+)	Always	Below 1 Ω
A13-19 (FLA+) or A8-35 (FLA+) - Body ground	Always	10 kΩ or higher
A13-18 (FLA-) - A8-38 (FLA-)	Always	Below 1 Ω
A13-18 (FLA-) or A8-38 (FLA-) - Body ground	Always	10 kΩ or higher
A10-34 (FRA+) - A8-44 (FRA+)	Always	Below 1 Ω
A10-34 (FRA+) or A8-44 (FRA+) - Body ground	Always	10 kΩ or higher
A10-33 (FRA-) - A8-43 (FRA-)	Always	Below 1 Ω
A10-33 (FRA-) or A8-43 (FRA-) - Body ground	Always	10 kΩ or higher
A13-8 (FLR+) - A8-21 (FLR+)	Always	Below 1 Ω
A13-8 (FLR+) or A8-21 (FLR+) - Body ground	Always	10 kΩ or higher
A13-9 (FLR-) - A8-22 (FLR-)	Always	Below 1 Ω
A13-9 (FLR-) or A8-22 (FLR-) - Body ground	Always	10 kΩ or higher
A10-6 (FRR+) - A8-28 (FRR+)	Always	Below 1 Ω
A10-6 (FRR+) or A8-28 (FRR+) - Body ground	Always	10 kΩ or higher
A10-7 (FRR-) - A8-27 (FRR-)	Always	Below 1 Ω
A10-7 (FRR-) or A8-27 (FRR-) - Body ground	Always	10 kΩ or higher
A10-17 (RLR+) - A8-25 (RLR+)	Always	Below 1 Ω
A10-17 (RLR+) or A8-25 (RLR+) - Body ground	Always	10 kΩ or higher
A10-16 (RLR-) - A8-26 (RLR-)	Always	Below 1 Ω
A10-16 (RLR-) or A8-26 (RLR-) - Body ground	Always	10 kΩ or higher
A13-2 (RRR+) - A8-23 (RRR+)	Always	Below 1 Ω
A13-2 (RRR+) or A8-23 (RRR+) - Body ground	Always	10 kΩ or higher
A13-1 (RRR-) - A8-24 (RRR-)	Always	Below 1 Ω
A13-1 (RRR-) or A8-24 (RRR-) - Body ground	Always	10 kΩ or higher
A10-4 (SMC1) - A8-37 (SMC1)	Always	Below 1 Ω
A10-4 (SMC1) or A8-37 (SMC1) - Body ground	Always	10 kΩ or higher
A10-3 (BS01) - A8-36 (BS1)	Always	Below 1 Ω
A10-3 (BS01) or A8-36 (BS1) - Body ground	Always	10 kΩ or higher
A13-4 (SMC2) - A8-19 (SMC2)	Always	Below 1 Ω
A13-4 (SMC2) or A8-19 (SMC2) - Body ground	Always	10 kΩ or higher
A13-7 (BS02) - A8-20 (BS2)	Always	Below 1 Ω
A13-7 (BS02) or A8-20 (BS2) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 3

RECONFIRM DTC

Reconnect the A13 and A10 skid control ECU assembly connectors.
Reconnect the A8 brake actuator assembly connector.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch off.
Turn the power switch on (IG).

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1315, C1316, C1352, C1353, C1354, C1355, C1356, C1357, C1358 and C1359 are not output.	A
DTCs C1315, C1316, C1352, C1353, C1354, C1355, C1356, C1357, C1358 and/or C1359 are output.	B

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023]

Result:

REPLACE SKID CONTROL ECU ASSEMBLY. Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]