Inspection Procedure

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester ON.
4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
5. Check the operation by referring to the table below.

   Combination Meter: 

   TESTER DISPLAY REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Speed Meter Operation	Speedometer	0, 40, 80, 120 mph ((1))	-
   		0, 40, 80, 120, 160, 200, 240 km/h ((2))
   (1) U.S.A. (2) except for models for U.S.A.

   OK: 

   Needle indication is normal. 

NG : REPLACE COMBINATION METER 

OK : Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester ON.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
5. Check the values by referring to the values in the table below.

   Combination Meter: 

   TESTER DISPLAY REFERENCE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle Speed Meter	Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)	Almost same as actual speed (When driving)	-

   OK: 

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

NG : Go to step 3 

OK : REPLACE COMBINATION METER 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester ON.
4. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
5. Check the values by referring to the table below.

   ABS/VSC/TRAC: 

   TESTER DISPLAY REFERENCE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FR/FL/RR/RL Wheel Speed	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. 

NG :  GO TO BRAKE CONTROL

OK : Go to next step 

1. Disconnect the A13 connector.
2. Disconnect the A48 connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   A13-7 (1) - Body ground	Engine switch on (IG)	10 to 14 V
   A48-9 (2) - Body ground	Engine switch on (IG)	10 to 14 V
   (1) for 1UR-FSE (2) for 2GR-FSE

NG :  Go to step  6

Fig 1: Inspecting Combination Meter (Output Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : Go to next step 

1. Check the input signal waveform.
   1. Remove the combination meter with the connector still connected.
   2. Connect the oscilloscope to the terminals K31-29 and body ground.
   3. Start the engine.
      Fig 2: Inspecting Skid Control ECU (Output Waveform)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Check the signal waveform of the connector.
      ITEM CONDITION REFERENCE CHART
      
      

      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.

      Fig 3: Identifying Signal Waveform

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE COMBINATION METER 

OK :  GO TO BRAKE CONTROL

1. Disconnect the K31 meter connector.
2. Disconnect the A13 ECU connector.
3. Disconnect the A48 ECU connector.
   Fig 4: Checking Harness And Connector (Combination Meter - Skid Control ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   K31-29 - A13-7(1)	Always	Below 1 Ω
   K31-29 - A48-9(2)	Always	Below 1 Ω
   K31-29 - Body ground	Always	10 kΩ or higher
   (1) 1UR-FSE (2) 2GR-FSE

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : REPLACE COMBINATION METER