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) [10/2018 - ]: Procedure

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

   OK

   The connector is securely connected.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Brake Actuator Assembly)

   -

   -

2. Disconnect the A48 brake actuator assembly connector.
3. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

4. 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
   5 (+BS) - 31 (SFRH)	Always	6.4 to 7.0 Ω
   5 (+BS) - 28 (SFLH)	Always	6.4 to 7.0 Ω
   5 (+BS) - 29 (SRRH)	Always	6.4 to 7.0 Ω
   5 (+BS) - 30 (SRLH)	Always	6.4 to 7.0 Ω
   5 (+BS) - 15 (SFRR)	Always	5.1 to 5.7 Ω
   5 (+BS) - 18 (SFLR)	Always	5.1 to 5.7 Ω
   5 (+BS) - 17 (SRRR)	Always	5.1 to 5.7 Ω
   5 (+BS) - 16 (SRLR)	Always	5.1 to 5.7 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

Result: 

OK 

See step  2

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

   OK

   The connector is securely connected.

2. Disconnect the A37 skid control ECU (brake booster with master cylinder assembly) connector.
3. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A37-14 (+BS) - A48-5 (+BS)	Always	Below 1 Ω
   A37-14 (+BS) or A48-5 (+BS) - Body ground	Always	10 kΩ or higher
   A37-48 (SFRH) - A48-31 (SFRH)	Always	Below 1 Ω
   A37-48 (SFRH) or A48-31 (SFRH) - Body ground	Always	10 kΩ or higher
   A37-49 (SFLH) - A48-28 (SFLH)	Always	Below 1 Ω
   A37-49 (SFLH) or A48-28 (SFLH) - Body ground	Always	10 kΩ or higher
   A37-50 (SRRH) - A48-29 (SRRH)	Always	Below 1 Ω
   A37-50 (SRRH) or A48-29 (SRRH) - Body ground	Always	10 kΩ or higher
   A37-51 (SRLH) - A48-30 (SRLH)	Always	Below 1 Ω
   A37-51 (SRLH) or A48-30 (SRLH) - Body ground	Always	10 kΩ or higher
   A37-44 (SFRR) - A48-15 (SFRR)	Always	Below 1 Ω
   A37-44 (SFRR) or A48-15 (SFRR) - Body ground	Always	10 kΩ or higher
   A37-45 (SFLR) - A48-18 (SFLR)	Always	Below 1 Ω
   A37-45 (SFLR) or A48-18 (SFLR) - Body ground	Always	10 kΩ or higher
   A37-46 (SRRR) - A48-17 (SRRR)	Always	Below 1 Ω
   A37-46 (SRRR) or A48-17 (SRRR) - Body ground	Always	10 kΩ or higher
   A37-47 (SRLR) - A48-16 (SRLR)	Always	Below 1 Ω
   A37-47 (SRLR) or A48-16 (SRLR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Reconnect the A37 skid control ECU (brake booster with master cylinder assembly) connector.
2. Reconnect the A48 brake actuator assembly connector.
3. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2018 - ]

   Chassis > ABS/VSC/TRAC > Clear DTCs 

4. Turn the power switch off.
5. Turn the power switch on (IG).
6. Check if the same DTC is output.

   Refer to DTC CHECK / CLEAR [10/2018 - ]

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   Result

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

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

B 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ]