Inspection Procedure

1. Operate the hand-held tester according to the steps on the display and select the "DATA LIST".

ABS: 

OK: 

Vehicle speed displayed on the tester is almost the same as the actual vehicle speed. 

NG: GO TO BRAKE CONTROL SYSTEM (SEE  ELECTRONICALLY CONTROLLED BRAKE SYSTEM DIAGNOSIS  ) 

OK: Go to next step. 

INSPECTION USING OSCILLOSCOPE 

1. Check the input signal waveform.
   1. Remove the combination meter assy.
   2. Connect the oscilloscope to the terminals C10-9 and body ground.
      Fig 1: Identifying C10-9 Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check the signal waveform according to the condition in the table below.

OK: 

As shown in the illustration 

HINT:

As vehicle speed increases, the cycle of the signal waveform narrows.

Fig 2: Waveform Signal Oscillograph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 3 

OK: REPLACE COMBINATION METER ASSY (SEE  INSTRUMENT PANEL/METER  ) 

1. Disconnect the C10 and S8 connectors.
2. Measure the resistance according to the value(s) in the table below.

Standard: 

Fig 3: Identifying ABS & Traction Actuator And Combination Meter Assy Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step. 

1. Disconnect the S8 connector.
2. Measure the resistance according to the value(s) in the table below.

Standard: 

Fig 4: Identifying S8-22 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE COMBINATION METER ASSY (SEE  INSTRUMENT PANEL/METER  ) 

OK: GO TO BRAKE CONTROL SYSTEM (SEE  ELECTRONICALLY CONTROLLED BRAKE SYSTEM DIAGNOSIS  )