Inspection Procedure

NOTE: When replacing the skid control ECU or brake actuator assembly, perform initialization of linear solenoid valve and calibration (see INITIALIZATION ).

INSPECT BRAKE ACTUATOR ASSEMBLY

Disconnect the brake actuator assembly connector.

Fig 1: Identifying Brake Actuator Assembly Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
20 (SMC1) - 19 (BS1)	15.3 to 25.0 Ω
6 (SMC2) - 7 (BS2)	15.3 to 25.0 Ω
8 (FRA+) - 5 (FRA-)	3.6 to 6.0 Ω
22 (FRR+) - 21 (FRR-)	3.6 to 6.0 Ω
13 (FLA+) - 14 (FLA-)	3.6 to 6.0 Ω
27 (FLR+) - 28 (FLR-)	3.6 to 6.0 Ω
12 (RRA+) -11 (RRA-)	3.6 to 6.0 Ω
10 (RLA+) - 9 (RLA-)	3.6 to 6.0 Ω
26 (RRR+) - 25 (RRR-)	4.4 to 7.0 Ω
24 (RLR+) - 23 (RLR-)	4.4 to 7.0 Ω

NG: REPLACE BRAKE ACTUATOR ASSEMBLY

OK: Go to next step

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

Disconnect the skid control ECU (A13, A15) connectors and brake actuator assembly connector.

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
A13-5 (SMC1) - A16-20 (SMC1)	Below 1 Ω
A13-32 (BSO1) - A16-19 (BS1)	Below 1 Ω
A13-3 (FRA+) - A16-8 (FRA+)	Below 1 Ω
A13-18 (FRA-) - A16-5 (FRA-)	Below 1 Ω
A13-4 (FRR+) - A16-22 (FRR+)	Below 1 Ω
A13-17 (FRR-) - A16-21 (FRR-)	Below 1 Ω
A13-33 (RLA+) - A16-10 (RLA+)	Below 1 Ω
A13-35 (RLA-) - A16-9 (RLA-)	Below 1 Ω
A13-34 (RLR+) - A16-24 (RLR+)	Below 1 Ω
A13-19 (RLR-) - A16-23 (RLR-)	Below 1 Ω
A15-5 (SMC2) - A16-6 (SMC2)	Below 1 Ω
A15-28 (BSO2) - A16-7 (BS2)	Below 1 Ω
A15-3 (FLA+) - A16-13 (FLA+)	Below 1 Ω
A15-16 (FLA-) - A16-14 (FLA-)	Below 1 Ω
A15-4 (FLR+) - A16-27 (FLR+)	Below 1 Ω
A15-15 (FLR-) - A16-28 (FLR-)	Below 1 Ω
A15-29 (RRA+) - A16-12 (RRA+)	Below 1 Ω
A15-17 (RRA-) - A16-11 (RRA-)	Below 1 Ω
A15-30 (RRR+) - A16-26 (RRR+)	Below 1 Ω
A15-31 (RRR-) - A16-25 (RRR-)	Below 1 Ω

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

Fig 2: Identifying Skid Control ECU And Brake Actuator Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Specified Condition
A13-5 (SMC1)) - Body ground	10 kΩ or higher
A13-32 (BSO1) - Body ground	10 kΩ or higher
A13-3 (FRA+) - Body ground	10 kΩ or higher
A13-18 (FRA-) - Body ground	10 kΩ or higher
A13-4 (FRR+) - Body ground	10 kΩ or higher
A13-17 (FRR-) - Body ground	10 kΩ or higher
A13-33 (RLA+) - Body ground	10 kΩ or higher
A13-35 (RLA-) - Body ground	10 kΩ or higher
A13-34 (RLR+) - Body ground	10 kΩ or higher
A13-19 (RLR-) - Body ground	10 kΩ or higher
A15-5 (SMC2) - Body ground	10 kΩ or higher
A15-28 (BSO2) - Body ground	10 kΩ or higher
A15-3 (FLA+) - Body ground	10 kΩ or higher
A15-16 (FLA-) - Body ground	10 kΩ or higher
A15-4 (FLR+) - Body ground	10 kΩ or higher
A15-15 (FLR-) - Body ground	10 kΩ or higher
A15-29 (RRA+) - Body ground	10 kΩ or higher
A15-17 (RRA-) - Body ground	10 kΩ or higher
A15-30 (RRR+) - Body ground	10 kΩ or higher
A15-31 (RRR-) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

RECONFIRM DTC

Clear the DTC (see DTC CHECK / CLEAR ).
Turn the engine switch on (IG).
Check if the same DTCs are recorded (see DTC CHECK / CLEAR ).
HINT:

Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

Result

RESULT CHART

Display (DTC Output)	Proceed To
DTCs (C1315/31, C1316/32, C1352/21, C1353/23, C1354/25, C1355/27, C1356/ 22, C1357/24, C1358/26 and C1359/28) are not output	A
DTCs (C1315/31, C1316/32, C1352/21, C1353/23, C1354/25, C1355/27, C1356/ 22, C1357/24, C1358/26 and C1359/28) are output	B

B: REPLACE SKID CONTROL ECU

A: END