Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to the ON position
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
5. Check the operation by referring to the values in the table below.

   Combination Meter: 

   CONTROL RANGE 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 U.S.A.

   OK: Needle indication is within the allowable range. 

NG: REPLACE COMBINATION METER ASSEMBLY 

OK: Go to next step. 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to the ON position.
3. Turn the Techstream 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: 

   MEASUREMENT ITEM/RANGE 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 measured using a speedometer tester (calibrated chassis dynamometer). 

NG: Go to step 3 

OK: REPLACE COMBINATION METER ASSEMBLY 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to the ON position.
3. Turn the Techstream 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: 

   MEASUREMENT ITEM/RANGE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   (FL/FR/RL/RR) 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 measured using a speedometer tester (calibrated chassis dynamometer). 

NG:  GO TO BRAKE CONTROL -- RX400H

OK: Go to next step. 

1. Disconnect the S39 connector.
2. Measure the voltage according to the value (s) in the table below.

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   S39-22 (SP1) - Body ground	Ignition switch ON	10 to 14 V

Fig 1: Identifying SP1 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step  6

OK: Go to next step. 

1. Check the input signal waveform.
   1. Remove the combination meter assembly with connector (s) still connected.
   2. Connect the oscilloscope to the terminals C9-18 (SPEED SIGNAL) and body ground.
   3. Start the engine.
   4. Check the signal waveform according to the condition (s) in the table below.
      SIGNAL WAVEFORM CONDITION
      
      

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

      OK: The waveform is displayed as shown in the illustration. 

      HINT:

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

   Fig 2: Identifying Speed Signal Terminal And Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ABS & TRACTION ACTUATOR ASSEMBLY 

OK: REPLACE COMBINATION METER ASSEMBLY 

1. Disconnect the C9 and S39 connectors.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   C9-18 (SPEED SIGNAL) - S39-22 (SP1)	Always	Below 1 Ω
   C9-18 (SPEED SIGNAL) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying C9 And S39 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE COMBINATION METER ASSEMBLY