Inspection Procedure

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

   METER:

   SPEED METER TEST DETAILS
   
   

   Item	Test Details
   SPEED METER	0 / 40(24) / 80(48) / 120(72) / 160(96) / 200(120) km/h(mph)

   1. OK: Needle indication is normal. 
   1. NG: REPLACE COMBINATION METER ASSY (See  OVERHAUL  ) 
   2. OK: GO TO NEXT STEP. 

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

   METER:

   ITEM CONDITION CHECK REFERENCE
   
   

   Item	Measurement Item/ Range (Display)	Normal Condition
   SPEED METER	Vehicle speed / Min.: 1 km/h (1 mph), Max.: 255 km/h (158 mph)	Almost same as actual vehicle speed (When driving)

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

   1. NG: Go to step 3 
   2. OK: REPLACE COMBINATION METER ASSY (See  OVERHAUL  ). 

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

   ABS:

   ITEM CONDITION CHECK REFERENCE
   
   

   Item	Measurement Item/ Range (Display)	Normal Condition
   (FR/FL/RR/RL) SPD	Vehicle speed / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Almost same as actual speed (When driving)

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

   1. NG: GO TO BRAKE CONTROL SYSTEM (See  CUSTOMER PROBLEM ANALYSIS CHECK  ) 
   2. 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 C12-6 and body ground.
   3. Start the engine.
      Fig 1: Identifying Wire Harness View

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Check the signal waveform according to the condition (s) in the table below.
      ITEM CONDITION CHECK REFERENCE
      
      

      Item	Condition
      Tool setting	5 V/DIV, 20 ms/DIV
      Vehicle condition	Driving at approx. 20 Km/h (12 mph)

      OK: As shown in the illustration 

      HINT:

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

      1. NG: Go to step 5 
         Fig 2: Identifying Cycle Of Signal Waveform Narrows

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. OK: REPLACE COMBINATION METER ASSY (See  OVERHAUL  ). 

1. Disconnect the C12 and S27 connectors.
2. Measure the resistance according to the value (s) in the table below.

   Standard:

   SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   C12-6 - S27-12	Always	Below 1 Ω
   C12-6 - Body ground	Always	10 kΩ or higher

   1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
      Fig 3: Identifying ABS & Traction Actuator Assy Terminal C27-12 And Combination Meter Assy Terminal C12-6

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. OK: GO TO NEXT STEP. 

1. Disconnect the S27 connector.
2. Measure the voltage according to the value (s) in the table below.

   Standard:

   CONNECTORS VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   S27-12 - Body ground	Ignition switch ON	10 to 14 V

   1. NG: REPLACE COMBINATION METER ASSY (See  OVERHAUL  ) 
      Fig 4: Identifying ABS & Traction Assy. Terminal S27-12

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. OK: GO TO BRAKE CONTROL SYSTEM (See  CUSTOMER PROBLEM ANALYSIS CHECK  )