Inspection Procedure

1. 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
2. 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 

1. Disconnect the connector from the engine room R/B No. 1.
2. 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 

1. Disconnect the connector from the skid control ECU.
   Fig 3: Identifying Terminals Of Skid Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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