Inspection Procedure

1. Connect Techstream to the DLC3.
2. Ignition 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: 

   ACTIVE TEST DETAIL - COMBINATION METER
   
   

   Tester Display	Test Part	Control Range
   Tacho Meter Operation	Tachometer	0, 1000, 2000, 3000,4000, 5000, 6000, 7000 (rpm)

   OK: 

   Needle indication is normal. 

NG: REPLACE COMBINATION METER ASSEMBLY 

OK: Go to next step 

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

   Combination Meter: 

   DATA LIST - COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Rpm	Engine speed/Min.: 0 rpm, Max.: 12750 rpm	Almost same as actual engine speed (When engine is running)	If data received from the ECM exceeds the range that can be displayed on the meter, the meter continues to display the maximum value of the range.

   OK: 

   Engine speed displayed on the tester is almost the same as the actual engine speed. 

NG: Go to step 3 

OK : REPLACE COMBINATION METER ASSEMBLY 

1. Connect Techstream to the DLC3.
2. Ignition switch on (IG).
3. Turn the tester ON.
4. Enter the following menus: Powertrain / Engine and ECT / Data List.
5. Check the values by referring to the table below.

   Engine and ECT: 

   DATA LIST - ENGINE AND ECT
   
   

   Tester Display	Measurement Item/Range	Normal Condition
   Engine Speed	Engine speed/Min.: 0 rpm, Max.: 16383.75 rpm	Almost same as actual engine speed (When engine is running)

   OK: 

   Engine speed displayed on the tester is almost the same as the actual engine speed. 

NG:  GO TO 2GR-FE ENGINE CONTROL SYSTEM

OK: Go to next step 

1. Check the input signal waveform.
   1. Remove the combination meter assembly.
   2. Connect the oscilloscope to the terminals E2-14 (TACHO) and body ground.
   3. Start the engine.
      Fig 1: Identifying Combination Meter Connector Terminals

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

      Item	Condition
      Tool setting	5V/DIV., 10 ms./DIV.
      Vehicle condition	Engine idle speed

      OK: 

      The waveform is displayed as shown in the illustration. 

NG: Go to step 5 

Fig 2: Waveform Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE COMBINATION METER ASSEMBLY 

1. Disconnect the E2 and D41 connectors.
2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection (Symbols)	Condition	Specified Condition
   E2-14 (TACHO) - A55-15 (TACH)	Always	Below 1 Ω
   E2-14 (TACHO) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying ECM And Combination Meter Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to  2GR-FE ENGINE CONTROL SYSTEM