Inspection Procedure

1. Check if the CAN communication system DTC is output (see DTC CHECK/CLEAR  ).

Result: 

1. B: REPAIR CAN COMMUNICATION SYSTEM (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
2. A: Go to next step. 

1. Check if the multiplex communication system DTC is output (see DTC CHECK/CLEAR ).

Result: 

1. B: REPAIR MULTIPLEX COMMUNICATION SYSTEM (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
2. A: Go to next step. 

1. Check the skid control ECU connector's connecting condition.

   OK: 

   The connector should be securely connected. 

1. NG: CONNECT CONNECTOR TO ECU CORRECTLY 
2. OK: Go to next step. 

1. Check the battery voltage.

   Standard: 

   Voltage: 11 to 14 V 

1. NG: INSPECT CHARGING SYSTEM (SEE  ON-VEHICLE INSPECTION  ) 
2. OK: Go to next step. 

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

Fig 1: Identifying Skid Control ECU Connector Terminal IG1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard: 

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 
2. OK: Go to next step. 

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

Fig 2: Identifying Skid Control ECU Connector Terminals GND1 & GND2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard: 

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 
2. OK: Go to next step. 

1. Check the combination meter assy (see HOW TO PROCEED WITH TROUBLESHOOTING ).

1. NG: REPLACE COMBINATION METER ASSY (SEE  OVERHAUL  ) 
2. OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  ) 

HINT:

If troubleshooting has been carried out according to the problem symptoms table, refer back to the table and proceed to the next step before replacing the part (see PROBLEM SYMPTOMS TABLE ).