Inspection Procedure

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

INSPECT BRAKE ACTUATOR ASSEMBLY

Disconnect the A16 actuator connector.

Fig 1: Identifying Terminal Of A16 Actuator Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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 (See REMOVAL )

OK: Go to next step

CHECK WIRE HARNESS (SKID CONTROL ECU - BRAKE ACTUATOR)

Disconnect the A13 and A15 ECU connectors.
Disconnect the A16 actuator connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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
A15-6 (SMC2) - A16-8 (SMC2)	Below 1 Ω
A15-32 (BSO2) - A16-7 (BS2)	Below 1 Ω
A15-3 (FLA+) - A16-13 (FLA+)	Below 1 Ω
A15-18 (FLA-) - A16-14 (FLA-)	Below 1 Ω
A15-4 (FLR+) - A16-27 (FLR+)	Below 1 Ω
A15-17 (FLR-) - A16-28 (FLR-)	Below 1 Ω
A15-33 (RRA+) - A16-12 (RRA+)	Below 1 Ω
A15-20 (RRA-) - A16-11 (RRA-)	Below 1 Ω
A15-34 (RRR+) - A16-26 (RRR+)	Below 1 Ω
A15-36 (RRR-) - A16-25 (RRR-)	Below 1 Ω

Fig 2: Identifying A13 And A15 ECU With A16 Actuator Connectors

G05816359

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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
A15-6 (SMC2) - Body ground	10 kΩ or higher
A15-32 (BSO2) - Body ground	10 kΩ or higher
A15-3 (FLA+) - Body ground	10 kΩ or higher
A15-18 (FLA-) - Body ground	10 kΩ or higher
A15-4 (FLR+) - Body ground	10 kΩ or higher
A15-17 (FLR-) - Body ground	10 kΩ or higher
A15-33 (RRA+) - Body ground	10 kΩ or higher
A15-20 (RRA-) - Body ground	10 kΩ or higher
A15-34 (RRR+) - Body ground	10 kΩ or higher
A15-36 (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 power 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 REFERENCE

Condition	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 (See REMOVAL )

A: END