Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BRK RELAY

Remove the BRK relay from the engine room R/B No.1.

Fig 1: Checking Resistance Of BRK Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check operation of the BRK relay.

Standard resistance

TERMINAL CONDITION SPECIFIED VALUE CHART

Terminal No.	Condition	Specified value
3 - 5	Always	10 kΩ or higher
3 - 5	When battery voltage is applied to terminal 1 and 2.	Below 1 Ω

NG: REPLACE BRK RELAY

OK: Go to Next Step

CHECK WIRE HARNESS AND CONNECTOR (BRK RELAY - BATTERY)

Disconnect the connector from the engine room R/B No. 1.

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

Standard voltage

TERMINAL CONDITION SPECIFIED VALUE CHART

Terminal No.	Condition	Specification
5 - Body ground	Ignition switch on (IG)	10 to 14 V
5 - Body ground	Ignition switch off	Below 1 V
2 - Body ground	Ignition switch on (IG)	10 to 14 V
2 - Body ground	Ignition switch off	Below 1 V

NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FAILURE RELAY (BRK RELAY)

Fig 2: Identifying Terminals Of BRK Relay Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK WIRE HARNESS AND CONNECTOR (BRK RELAY - SKID CONTROL ECU)

Disconnect the connector from the skid control ECU.

Fig 3: Identifying Terminals Of Skid Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TERMINAL CONDITION SPECIFIED VALUE CHART

Terminal No.	Condition	Specification
1 - A34-16 (STP0)	Always	Below 1 Ω
A34-16 (STP0) - Body ground	Always	10 kΩ or higher
4 - A34-21 (STP2)	Always	Below 1 Ω
A34-21 (STP2) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SKID CONTROL ECU