Meter / Gauge System Tachometer Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ENGINE TYPE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING GTS (TACHO METER OPERATION)

READ VALUE USING GTS (ENGINE RPM)

READ VALUE USING GTS (ENGINE SPEED)

CHECK ECM

PERFORM ACTIVE TEST USING GTS (TACHO METER OPERATION)

CHECK COMBINATION METER ASSEMBLY (ENGINE SPEED SIGNAL)

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

CHECK ECM

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Check the engine type.
   

   Result

   Result	Proceed to
   except 5L-E	A
   for 5L-E	B

1. Check if a CAN communication DTC is output.
   

   1. for LHD with Entry and Start System (LandCruiser RM000000WIB0ECX.html).
      

   2. for LHD without Entry and Start System (LandCruiser RM000000WIB0EDX.html).
      

   3. for RHD with Entry and Start System (LandCruiser RM000000WIB0EEX.html).
      

   4. for RHD without Entry and Start System (LandCruiser RM000000WIB0EFX.html).
      

      Result

      Result	Proceed to
      CAN communication DTC is not output.	A
      CAN communication DTC is output. (for LHD, with Entry and Start System)	B
      CAN communication DTC is output. (for LHD, without Entry and Start System)	C
      CAN communication DTC is output. (for RHD, with Entry and Start System)	D
      CAN communication DTC is output. (for RHD, without Entry and Start System)	E

1. Using the GTS, perform the Active Test (LandCruiser RM0000012G70JTX.html).
   
   

   Combination Meter

   Tester Display	Test Part	Control Range	Diagnostic Note
   Tacho Meter Operation	Tachometer	OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000* (rpm)	-

   1. *: for 1GR-FE, 2TR-FE
      

      OK:

      Tachometer indication is normal.
      

1. Using the GTS, read the Data List (LandCruiser RM0000012G70JTX.html).
   
   

   Combination Meter

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Rpm	Engine speed/Min.: 0 rpm, Max.: 12750 rpm	600 to 700 rpm (When idling)	If the 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 intelligent tester is almost the same as the tachometer indication.
   

2. Record the engine speed displayed on the intelligent tester.
   

   HINT:

   Check the engine speed when the engine is fully warmed up and the air conditioning and all electrical accessories are off.

1. Using the GTS, read the Data List (LandCruiser RM0000012G70JTX.html).
   
   

   Engine and ECT

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Engine Speed	Engine speed/Min.: 0 rpm, Max.: 16383 rpm	600 to 700 rpm (When idling)	-

   OK:

   Engine speed displayed on GTS is almost same as actual engine speed.
   

   Result

   Result	Proceed to
   OK	A
   NG (for Gasoline Engine)	B
   NG (for Diesel Engine)	C

   HINT:

   1. for 1GR-FE:
      If it is necessary to refer to the SFI system, refer to the following procedures (LandCruiser RM000000PD915IX.html).
      
   2. for 2TR-FE:
      If it is necessary to refer to the SFI system, refer to the following procedures (LandCruiser RM000000VNB00DX.html).
      
   3. for 1KD-FTV:
      If it is necessary to refer to the ECD system, refer to the following procedures (LandCruiser RM0000012WB0A9X.html).
      
   4. for 1GD-FTV
      If it is necessary to refer to the ECD system, refer to the following procedures (LandCruiser RM0000012WB0ADX.html).
      
   5. for 1GD-FTV, w/ Urea SCR System:
      If it is necessary to refer to the ECD system, refer to the following procedures (LandCruiser RM0000012WB0ACX.html).
      

1. Replace the ECM with a new or normally functioning one.
   

   1. for 1GR-FE: LandCruiser RM00000329203TX.html
      
   2. for 2TR-FE: LandCruiser RM000000VW203EX.html
      
   3. for 1KD-FTV: LandCruiser RM0000013Z002CX.html
      
   4. for 1GD-FTV: LandCruiser RM0000013Z002DX.html
      

2. Check that the operation of the tachometer returns to normal.
   

   OK:

   The operation of the tachometer returns to normal.
   

1. Using the GTS, perform the Active Test (LandCruiser RM0000012G70JTX.html).
   
   

   Combination Meter

   Tester Display	Test Part	Control Range	Diagnostic Note
   Tacho Meter Operation	Tachometer	OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000* (rpm)	-

   1. *: for 1GR-FE, 2TR-FE
      

      OK:

      Tachometer indication is normal.
      

1. Remove the combination meter assembly with the connector(s) still connected (LandCruiser RM000003QKY01CX.html).
   

2. Check the signal waveform according to the condition(s) in the table below.
   

   Measurement Condition

   Item	Content
   Tester Connection	G6-34 (S) - Body ground
   Tool Setting	5 V/DIV, 20 ms./DIV
   Vehicle Condition	Idling with warm engine

   HINT:

   As the engine speed increases, the wavelength shortens.

   OK:

   The waveform displayed is as shown in the illustration.
   

   Text in Illustration

   *a	Front view of wire harness connector (to Combination Meter Assembly)
   *b	Speed Signal Waveform

1. Disconnect the G6 combination meter assembly connector.
   

2. Disconnect the G182 ECM connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   G6-34 (S) - G182-7 (TACH)	Always	Below 1 Ω
   G6-34 (S) or G182-7 (TACH) - Body ground	Always	10 kΩ or higher

1. Replace the ECM with a new or normally functioning one (LandCruiser RM000000VW203FX.html).
   

2. Check that the operation of the tachometer returns to normal.
   

   OK:

   The operation of the tachometer returns to normal.