Meter / Gauge System Speed Signal Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK COMBINATION METER ASSEMBLY (INPUT VOLTAGE)

CHECK COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE)

CHECK COMBINATION METER ASSEMBLY (SPEED SIGNAL)

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - SKID CONTROL ECU)

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION BLOCK)

CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK)

SYSTEM CHECK

CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - WINDSHIELD WIPER SWITCH ASSEMBLY)

CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - POWER MANAGEMENT CONTROL ECU)

CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - JUNCTION CONNECTOR)

CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR)

CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - RADIO RECEIVER ASSEMBLY)

CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)

CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - NAVIGATION RECEIVER ASSEMBLY)

CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - STEREO COMPONENT AMPLIFIER ASSEMBLY)

CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - NO. 4 JUNCTION BLOCK)

CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK)

CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK - CLEARANCE WARNING ECU)

CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK - TCM)

CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK - ECM)

CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - TIRE PRESSURE MONITOR RECEIVER ASSEMBLY)

METER / GAUGE SYSTEM - Speed Signal Circuit


DESCRIPTION

The vehicle speed signal consists of pulses sent to the combination meter assembly from the master cylinder solenoid*1 or brake actuator assembly (skid control ECU)*2.
  1. *1: for 1GR-FE, 1KD-FTV, 1GD-FTV
  2. *2: for 2TR-FE, 5L-E

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit


INSPECTION PROCEDURE

1.CHECK COMBINATION METER ASSEMBLY (INPUT VOLTAGE)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit
  1. Disconnect the combination meter assembly connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    Switch Condition
    Specified Condition
    G6-32 (+S) - Body ground
    Ignition switch ON
    4.5 to 14 V
    Text in Illustration
    *a
    Front view of wire harness connector
    (to Combination Meter Assembly)


NG
Go to step 5
OK


2.CHECK COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE)


  1. for 1GR-FE, 1KD-FTV, 1GD-FTV:

    1. Disconnect the master cylinder solenoid (skid control ECU) connector.



    2. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage:
      Tester Connection
      Switch Condition
      Specified Condition
      A7-12 (SP1) - Body ground
      Ignition switch ON
      11 to 14 V
      Text in Illustration
      *a
      Front view of wire harness connector
      (to Master Cylinder Solenoid [Skid Control ECU])


  1. for 2TR-FE, 5L-E:

    1. Disconnect the brake actuator assembly (skid control ECU) connector.



    2. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage:
      Tester Connection
      Switch Condition
      Specified Condition
      A6-11 (SP1) - Body ground
      Ignition switch ON
      11 to 14 V
      Text in Illustration
      *a
      Front view of wire harness connector
      (to Brake Actuator Assembly [Skid Control ECU])


NG
Go to step 4
OK


3.CHECK COMBINATION METER ASSEMBLY (SPEED SIGNAL)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit
  1. Check the input waveform.

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

    2. Connect an oscilloscope to terminal G6-33 (SI) and body ground.

    3. Turn the ignition switch to ON.

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

      Measurement Condition
      Item
      Condition
      Terminal No. (Symbol)
      G6-33 (SI) - Body ground
      Tool setting
      5 V/DIV., 20 ms./DIV.
      Condition
      Driving at approximately 20 km/h (12 mph)
      Text in Illustration
      *a
      Component with harness connected
      (Combination Meter Assembly)
      OK:
      The waveform displayed is 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.
      Result
      Result
      Proceed to
      OK
      A
      NG (for LHD, w/ Hydraulic Brake Booster)
      B
      NG (for RHD, w/ Hydraulic Brake Booster)
      C
      NG (w/ Vacuum Brake Booster)
      D


B
REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU) (LandCruiser RM00000171U02DX.html)

C
REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU) (LandCruiser RM00000171U02EX.html)

D
REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (LandCruiser RM0000034UX02TX.html)
A

REPLACE COMBINATION METER ASSEMBLY (LandCruiser RM000003QKY01CX.html)

4.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - SKID CONTROL ECU)
  1. for 1GR-FE, 1KD-FTV, 1GD-FTV:

    1. Disconnect the G6 combination meter assembly connector.

    2. Disconnect the A7 master cylinder solenoid (skid control ECU) connector.

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

      Standard Resistance:
      Tester Connection
      Condition
      Specified Condition
      G6-33 (SI) - A7-12 (SP1)
      Always
      Below 1 Ω
      A7-12 (SP1) - Body ground
      Always
      10 kΩ or higher
  1. for 2TR-FE, 5L-E:

    1. Disconnect the G6 combination meter assembly connector.

    2. Disconnect the A6 brake actuator assembly (skid control ECU) connector.

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

      Standard Resistance:
      Tester Connection
      Condition
      Specified Condition
      G6-33 (SI) - A6-11 (SP1)
      Always
      Below 1 Ω
      A6-11 (SP1) - Body ground
      Always
      10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COMBINATION METER ASSEMBLY (LandCruiser RM000003QKY01CX.html)

5.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION BLOCK)
  1. Disconnect the G6 combination meter assembly connector.

  1. Disconnect the 3A No. 3 junction block connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    G6-32 (+S) - 3A-59
    Always
    Below 1 Ω
    G6-32 (+S) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK)


  1. Inspect for a short in the circuit that is connected to the junction block connector shown in the wiring diagram.

    HINT:
    If the voltage is not as specified, it is possible that an ECU or circuit has a malfunction. The malfunctioning ECU or circuit will be diagnosed in the following steps.


    1. Disconnect the No. 3 junction block connectors.


      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit


      Text in Illustration
      *1
      No. 3 Junction Block
      -
      -
      *a
      Front view of wire harness connector
      (to No. 3 Junction Block)
      -
      -
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage:
      Tester Connection
      Condition
      Specified Condition
      3C-24 - Body ground*1
      Ignition switch ON
      4.5 to 14 V
      3B-72 - Body ground*2
      Ignition switch ON
      4.5 to 14 V
      3A-22 - Body ground*3
      Ignition switch ON
      4.5 to 14 V
      3A-60 - Body ground
      Ignition switch ON
      4.5 to 14 V
      3A-35 - Body ground*4
      Ignition switch ON
      4.5 to 14 V
      1. *1: w/ Auto Wiper System
      2. *2: w/ Entry and Start System
      3. *3: w/ Audio and Visual System or Navigation System
      4. *4: w/ Tire Pressure Monitor System
      Result
      Result
      Proceed to
      Voltage is not as specified in one circuit
      A
      Voltage is as specified in all circuits
      B


B
REPLACE NO. 3 JUNCTION BLOCK
A


7.SYSTEM CHECK
  1. Select the circuit for which voltage was not as specified in the previous step.

    Result
    Tester Connection
    System that Uses the Circuit
    Proceed to
    3C-24 - Body ground
    Auto wiper system*1
    A
    3B-72 - Body ground
    Entry and start system*2
    B
    3A-22 - Body ground
    Audio and visual system*3 or navigation system*4
    C
    3A-60 - Body ground
    SFI system, TOYOTA parking assist-sensor system*5, automatic transmission system*6, *7
    D
    3A-35 - Body ground
    Tire pressure monitor system*8
    E
    1. *1: w/ Auto Wiper System
    2. *2: w/ Entry and Start System
    3. *3: w/ Audio and Visual System
    4. *4: w/ Navigation System
    5. *5: w/ TOYOTA Parking Assist-sensor System
    6. *6: for 1KD-FTV
    7. *7: for Automatic Transmission
    8. *8: w/ Tire Pressure Monitor System


B
Go to step 9

C
Go to step 10

D
Go to step 15

E
Go to step 20
A


8.CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - WINDSHIELD WIPER SWITCH ASSEMBLY)
  1. Disconnect the G120 auto wiper switch connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    G120-6 (SPD) - Body ground*1, *2
    Always
    10 kΩ or higher
    G120-4 (SPD) - Body ground*3
    Always
    10 kΩ or higher
    1. *1: for LHD
    2. *2: for RHD, LH Side Type
    3. *3: for RHD, RH Side Type


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY (LandCruiser RM000002ZQ604TX.html)

9.CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - POWER MANAGEMENT CONTROL ECU)
  1. Disconnect the G51 power management control ECU connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    G51-23 (SPD) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER MANAGEMENT CONTROL ECU (LandCruiser RM0000039R5026X.html)

10.CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - JUNCTION CONNECTOR)
  1. Disconnect the 3A No. 3 junction block connector.

  1. Disconnect the H24 junction connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    3A-22 - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


11.CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR)


  1. Inspect for a short in the circuit that is connected to the junction connector shown in the wiring diagram.



      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit
    1. Disconnect the junction connector.

      Text in Illustration
      *a
      Front view of wire harness connector
      (Junction Connector)
    2. Measure the voltage according to the value(s) in the table below

      Standard Voltage:
      Tester Connection
      Switch Condition
      Specified Condition
      H25-10 - Body ground*1
      Ignition switch ON
      4.5 to 14 V
      H25-11 - Body ground*2
      Ignition switch ON
      4.5 to 14 V
      1. *1: w/ Audio and Visual System or Navigation System
      2. *2: w/ Stereo Component Amplifier
      Result
      Result
      Proceed to
      NG (H25-10 - Body ground)
      A
      NG (H25-11 - Body ground)
      B
      OK
      C


B
Go to step 15

C
REPLACE JUNCTION CONNECTOR
A


12.CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - RADIO RECEIVER ASSEMBLY)
NOTICE:
For vehicles with an audio and visual system (for radio and display type), go to "Check Harness and Connector (Junction Connector - Radio and Display Receiver Assembly)".
  1. Disconnect the H47 radio receiver assembly connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    H47-17 (SPD) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE RADIO RECEIVER ASSEMBLY (LandCruiser RM000005M1U002X.html)

13.CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)
NOTICE:
For vehicles with a navigation system, go to "Check Harness and Connector (Junction Connector - Navigation Receiver Assembly)".
  1. Disconnect the H51 radio and display receiver assembly connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    H51-17 (SPD) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (LandCruiser RM000003AHY02NX.html)

14.CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - NAVIGATION RECEIVER ASSEMBLY)
  1. Disconnect the H56 navigation receiver assembly connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    H56-17 (SPD) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE NAVIGATION RECEIVER ASSEMBLY (LandCruiser RM000003B6H02GX.html)

15.CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - STEREO COMPONENT AMPLIFIER ASSEMBLY)
  1. Disconnect the H63 stereo component amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    H63-11 (SPD) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY (LandCruiser RM000003AI9027X.html)

16.CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - NO. 4 JUNCTION BLOCK)
  1. Disconnect the 3A No. 3 junction block connector.

  1. Disconnect the 4A No. 4 junction block connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    3A-60 (+S) - 4A-48
    Always
    Below 1 Ω
    3A-60 (+S) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


17.CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK)


  1. Inspect for a short in the circuit that is connected to the junction connector shown in the wiring diagram.



    1. Disconnect the No. 4 junction block connectors.


      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System  Speed Signal Circuit


      Text in Illustration
      *1
      No. 4 Junction Block
      -
      -
      *a
      Front view of wire harness connector
      (to No. 4 Junction Block)
      -
      -
    2. Measure the voltage according to the value(s) in the table below

      Standard Voltage:
      Tester Connection
      Switch Condition
      Specified Condition
      4B-49 - Body ground*1
      Ignition switch ON
      4.5 to 14 V
      4B-1 - Body ground*2, *3
      Ignition switch ON
      4.5 to 14 V
      4A-96 - Body ground
      Ignition switch ON
      4.5 to 14 V
      1. *1: w/ TOYOTA Parking Assist-sensor System
      2. *2: for 1KD-FTV
      3. *3: for Automatic Transmission
      Result
      Result
      Proceed to
      NG (4B-49 - Body ground)
      A
      NG (4B-1 - Body ground)
      B
      NG (4A-96 - Body ground)
      C
      OK
      D


B
Go to step 19

C
Go to step 20

D
REPLACE NO. 4 JUNCTION BLOCK
A


18.CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK - CLEARANCE WARNING ECU)
  1. Disconnect the I1 clearance warning ECU connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    I1-3 (SPD) - Body ground
    Always
    10 kΩ or higher
    Result
    Result
    Proceed to
    OK (for LHD)
    A
    OK (for RHD)
    B
    NG
    C


B
REPLACE CLEARANCE WARNING ECU ASSEMBLY (for RHD) (LandCruiser RM00000470500NX.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

REPLACE CLEARANCE WARNING ECU ASSEMBLY (LandCruiser RM00000466X025X.html)

19.CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK - TCM)
  1. Disconnect the G70 TCM connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    G70-25 (SPD1) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TCM (LandCruiser RM0000048F300JX.html)

20.CHECK HARNESS AND CONNECTOR (NO. 4 JUNCTION BLOCK - ECM)
  1. Disconnect the G55*1, G56*2, G181*3, G58*4, G184*5 or G182*6 ECM connector.

    1. *1: for 1GR-FE, Automatic Transmission
    2. *2: for 1GR-FE, Manual Transmission
    3. *3: for 2TR-FE
    4. *4: for 1KD-FTV
    5. *5: for 1GD-FTV
    6. *6: for 5L-E
  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    for 1GR-FE, Automatic Transmission
    Tester Connection
    Condition
    Specified Condition
    G56-12 (SPD) - Body ground
    Always
    10 kΩ or higher
    for 1GR-FE, Manual Transmission
    Tester Connection
    Condition
    Specified Condition
    G55-18 (SPD) - Body ground
    Always
    10 kΩ or higher
    for 2TR-FE
    Tester Connection
    Condition
    Specified Condition
    G181-23 (SPD) - Body ground
    Always
    10 kΩ or higher
    for 1KD-FTV
    Tester Connection
    Condition
    Specified Condition
    G58-30 (SPD) - Body ground
    Always
    10 kΩ or higher
    for 1GD-FTV
    Tester Connection
    Condition
    Specified Condition
    G184-10 (SPD) - Body ground
    Always
    10 kΩ or higher
    for 5L-E
    Tester Connection
    Condition
    Specified Condition
    G182-25 (SP1) - Body ground
    Always
    10 kΩ or higher
    HINT:
    1. for 1GR-FE:
      If it is necessary to replace the ECM, refer to the following procedures (LandCruiser RM00000329203TX.html).
    2. for 2TR-FE:
      If it is necessary to replace the ECM, refer to the following procedures (LandCruiser RM000000VW203EX.html).
    3. for 1KD-FTV:
      If it is necessary to replace the ECM, refer to the following procedures (LandCruiser RM0000013Z002CX.html).
    4. for 1GD-FTV:
      If it is necessary to replace the ECM, refer to the following procedures (LandCruiser RM0000013Z002DX.html).
    5. for 5L-E:
      If it is necessary to replace the ECM, refer to the following procedures (LandCruiser RM000000VW203FX.html).


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM

21.CHECK HARNESS AND CONNECTOR (NO. 3 JUNCTION BLOCK - TIRE PRESSURE MONITOR RECEIVER ASSEMBLY)
  1. Disconnect the R41 tire pressure monitor receiver connector.

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

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    R41-2 (SPD) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TIRE PRESSURE MONITOR RECEIVER ASSEMBLY (LandCruiser RM000002L8501CX.html)