Inspection Procedure

1. Check if a CAN communication system DTC is output (See DIAGNOSIS SYSTEM ).

   Result 

   RESULT REFERENCE
   
   

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

B: INSPECT CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to next step 

1. Check if a multiplex communication system DTC is output (See DIAGNOSTIC TROUBLE CODE CHART )

   Result 

   RESULT REFERENCE
   
   

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

B: INSPECT MULTIPLEX COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

A: Go to next step 

1. Check if the skid control ECU connector is securely connected.

   OK: The connector is securely connected. 

NG: CONNECT CONNECTOR TO ECU CORRECTLY  (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )

OK: Go to next step 

1. Check the battery voltage

   Standard Voltage: 

   11 to 14 V 

NG: CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2UR-GSE)  (See ON-VEHICLE INSPECTION )

OK: Go to next step 

1. Disconnect the skid control ECU connector
2. Turn the engine switch on (IG)
3. Measure the voltage according to the value(s) in the table below

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Switch Condition	Specified Condition
   J77-1 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V

Fig 1: Identifying Skid Control ECU (IG1 Terminal)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 

OK: Go to next step 

1. Turn the engine switch off
2. Disconnect the skid control ECU connectors.
3. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J78-26 (GND1) - Body ground	Always	Below 1 Ω
   J78-14 (GND2) - Body ground	Always	Below 1 Ω
   A35-22 (GND3) - Body ground	Always	Below 1 Ω

Fig 2: Identifying Skid Control ECU (GND Terminal)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to next step 

1. Reconnect the skid control ECU connectors.
2. Perform the Active Test of the combination meter (meter CPU) using the Techstream (See DATA LIST / ACTIVE TEST ).
3. Check the combination meter.

   OK: The ABS warning light turns on or off in accordance with the Techstream operation. 

   HINT

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE  )

NG: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

OK: REPLACE SKID CONTROL ECU  (See REMOVAL  )