Inspection Procedure

NOTE: When replacing the ABS & TRACTION actuator assembly, perform zero point calibration (See CALIBRATION ).

INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

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

Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
A34-1 (GND2) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT)

Fig 1: Identifying Skid Control ECU Connector (GND Terminal Continuity)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

PERFORM ACTIVE TEST BY TECHSTREAM (ABS MOTOR RELAY OPERATION)

Check the operating sound of the ABS motor relay when operating it with Telecaster.

ACTIVE TEST: ABS / VSC / TRAC

ACTIVE TEST

Item	Vehicle Condition / Test Details	Diagnostic Note
ABS Motor Relay	Turns ABS motor relay ON or OFF	Operating sound of relay (clicking sound) is heard

OK:

The operating sound of the ABS motor relay is heard.

NG: REPLACE ABS & TRACTION ACTUATOR ASSEMBLY

OK: Go to next step

RECONFIRM DTC

Check that the same DTC is recorded.

HINT:

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

Result

RESULT CHART

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

HINT:

If a speed signal of 4 mph (6 km/h) or more is input to the skid control ECU, with the ignition switch on (IG) and the stop light switch OFF, the ECU performs self diagnosis of the motor and solenoid circuits.
If a normal system code is output (trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the ABS & TRACTION actuator assembly. Make sure that no DTCs are output.
If any DTCs are output while jiggling a connector or wire harness of the ABS & TRACTION actuator assembly, inspect and repair the connector or wire harness.

HINT:

It is suspected that the DTCs were output due to a bad connection of the connector terminal.

B : REPLACE ABS & TRACTION ACTUATOR ASSEMBLY

A : END