Combination Meter: Inspection

WARNING: This page is about a different car, the 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Inspect Combination Meter Circuit
Connect the connector "A", "B", "C" and "D" to the combination meter and inspect the wire harness side connectors from the back side as shown.

Fig 1: Identifying Combination Meter Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Combination Meter Terminal Test Specifications (1 Of 4)
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Fig 3: Identifying Combination Meter Terminal Test Specifications (2 Of 4)
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Fig 4: Identifying Combination Meter Terminal Test Specifications (3 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Identifying Combination Meter Terminal Test Specifications (4 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If circuit is not as specified, use wiring diagram to inspect the circuits connected to other parts.
Inspect Speedometer/On-Vehicle
Using a speedometer tester, inspect the speedometer for allowable indication error and check the operation of the odometer.

NOTE: Tire wear and tire over or under inflation will increase the indication error.

Fig 6: Displaying Allowable Range Of Error For Speedometer
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If error is excessive, replace the speedometer.
Inspect Speedometer Resistance
Measure the resistance between terminals while fixing pointer to the stopper.

Fig 7: Identifying Speedometer Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 8: Displaying Meter Connection Resistance
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If resistance value is not as the specified, replace the meter.
Inspect Tachometer/On-Vehicle
1. Connect a tune-up test tachometer, and start the engine.
  CAUTION:
  - Reversing the connection of the tachometer will damage the transistors and diodes inside.
  - When removing or installing the tachometer, be careful not to drop or subject it to heavy shocks.
2. Compare the tester and tachometer indications.
  DC 13.5 V 25° C at (77° F):
  
  Fig 9: Displaying Allowable Range Of Tachometer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Inspect Tachometer Resistance
Measure the resistance between terminals while fixing pointer to the stopper.

Fig 10: Identifying Tachometer Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 11: Displaying Tester Connection Resistance
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If resistance value is not as specified, replace the meter.
Inspect Voltmeter Resistance
Measure the resistance between terminals while fixing pointer to the stopper.

Fig 12: Identifying Voltmeter Terminals
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Fig 13: Displaying Tester Connection Resistance
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If resistance value is not as specified, replace the meter.
Inspect Fuel Receiver Gauge Resistance
Measure the resistance between terminals while fixing pointer to the stopper.

Fig 14: Identifying Fuel Receiver Gauge Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 15: Displaying Tester Connection Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance value is not as specified, replace the receiver gauge.
Inspect Fuel Sender Gauge Resistance
1. Apply voltage between terminals 2 and 3.
  
  Fig 16: Displaying Fuel Sender Gauge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure voltage between terminals 1 and 2 for each float position.
  
  Fig 17: Displaying Voltage Based On Float Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If voltage value is not as specified, replace main sender gauge.
Inspect Engine Coolant Temperature Receiver Gauge Operation
1. Disconnect the connector from the sender gauge.
2. Turn the ignition switch ON and check that the receiver gauge needle indicates COOL.
  
  Fig 18: Displaying Engine Coolant Temperature Gauge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Ground terminal on the wire harness side connector through a 3.4-W test bulb.
  
  Fig 19: Checking Engine Coolant Temperature Gauge Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Turn the ignition switch ON, and check that the bulb lights up and the receiver gauge needle moves to the hot side.
  If operation is as specified, replace the sender gauge.
  
  Then recheck the system.
  
  If operation is not as specified, measure the receiver gauge resistance.
Inspect Engine Coolant Temperature Receiver Gauge Resistance
Measure the resistance between terminals while fixing pointer to the stopper.

Fig 20: Identifying Engine Coolant Temperature Receiver Gauge Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 21: Displaying Tester Connection Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance value is not as specified, replace the receiver gauge.

NOTE: This circuit includes the diode.

If resistance value is not as specified, replace the receiver gauge.
Inspect Engine Coolant Temperature Sender Gauge Resistance
Connect the wire harness as shown in Fig 22, and enter the value in the left formula. Check the resistance conforms to the values in Fig 23.

Fig 22: Displaying Sender Gauge Being Tested
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Fig 23: Displaying Temperature Resistance
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If resistance value is not as specified, replace the engine coolant temperature sender gauge.
Inspect Oil Pressure Receiver Gauge Operation
1. Disconnect the connector from the sender gauge.
  
  Fig 24: Displaying Oil Pressure Receiver Gauge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON and check that the receiver gauge needle indicates LOW.
3. Ground terminal on the wire harness side through a 3.4 W test bulb.
  
  Fig 25: Checking Oil Pressure Receiver Gauge Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Turn the ignition switch ON and check that the bulb lights up and that the receiver gauge needle moves to the high side.
  If operation is not as specified, measure the receiver gauge resistance.
Inspect Oil Pressure Receiver Gauge Resistance
Measure the resistance between terminals while fixing pointer to the stopper.

Fig 26: Identifying Oil Pressure Receiver Gauge Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 27: Displaying Tester Connection Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance value is not as the specified, replace the meter.
Inspect Oil Pressure Sender Gauge Operation
1. Disconnect the connector from the sender gauge.
2. Apply battery positive voltage to the sender gauge terminal through a test LED.
  
  Fig 28: Checking Voltage Of Sender Gauge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that the bulb does not light when the engine is stopped.
4. Check that the LED flashes when the engine is running.
  The number of flashed should vary with engine speed.
If operation is not as specified, replace the sender gauge.
Inspect ABS Warning Buzzer Operation
1. Disconnect the connector from the meter connectors.
2. Apply battery positive voltage to the terminal A16 and A18.
  
  Fig 29: Checking ABS Warning Buzzer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the meter.
Inspect Brake Warning Light
1. Disconnect the connector from the brake fluid warning switch.
2. Release the parking brake pedal.
3. Connect the terminals on the wire harness side of the level warning switch connector.
  
  Fig 30: Checking Brake Warning Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Start the engine, check that the warning light lights up.
  If the warning light does not lights up, test the bulb or wire harness.
Inspect Brake Fluid Level Warning Switch Continuity
1. Remove the reservoir tank cap and strainer.
2. Disconnect the connector.
3. Check that no continuity exists between the terminals with the switch OFF (float up).
  
  Fig 31: Checking Brake Fluid Level Warning Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Use siphon, etc. to take fluid out of the reservoir tank.
5. Check that continuity exists between the terminals with the switch ON (float down)
6. Pour the fluid back in the reservoir tank.
  If operation is not as specified, replace the switch.
Inspect Parking Brake Switch Continuity
1. Check that continuity exists between the terminal and switch body with the switch ON (switch pin released).
  
  Fig 32: Checking Parking Brake Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that no continuity exists between the terminal and switch body with the switch OFF (switch pin pushed in).
  If operation is not as specified, replace the switch or inspect ground point.
Inspect Open Door Warning Light
Disconnect the connector from the door courtesy switch and ground terminal 1 on the wire harness side, and check that the warning light lights up.

Fig 33: Checking Open Door Warning Light
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the warning light does not lights up, inspect the bulb or wire harness.
Inspect Seat Belt Warning Light
1. Disconnect the connector from the retractor switch and ground terminal on the wire harness side connector.
  
  Fig 34: Checking Seat Belt Warning Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON and check that the warning light lights up.
3. If the warning light does not lights up, inspect the bulb or wire harness.
Inspect Seat Belt Buckle Switch Continuity
1. Check that continuity exists between the terminals 1 and 4 on the switch side connector with the switch ON (belt fastened).
  
  Fig 35: Checking Seat Belt Buckle Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that continuity exists between the terminals 2 and 4 on the switch side connector with the switch OFF (belt unfastened).
  If operation is not as specified, replace the switch.
Inspect Seat Belt Buckle Switch Circuit
Disconnect the switch connector and inspect the connector on wire harness side, as shown in Fig 36.

Fig 36: Displaying Wire Harness Side Of Connector
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Fig 37: Displaying Continuity Based On Connection
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If continuity is not as specified, inspect the circuits connected to other parts.
Passenger Seat Only: Inspect Seat Belt Warning Occupant Detection Sensor Continuity
Check that continuity exists between the terminals 1 and 2 when pressing the sensing part.

Fig 38: Checking Seat Belt Warning Occupant Detection Session Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If operation is not as specified, replace the sensor.
Inspect Light Control Rheostat
1. Connect the positive (+) lead front the battery to terminal 1 and negative lead (-) to terminal 3.
  
  Fig 39: Checking Light Control Rheostat
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the positive (+) lead from the voltmeter to terminal 2 and negative lead to terminal 3.
3. Turn the rheostat knob and check that the voltage changes.
Inspect Inclination Sensor
1. With the combination meter in which the inclination sensor is installed, connect the battery plus to the A16 terminal (IGN+) of the meter connector, and battery minus to the B16 terminal (E/G EARTH).
  
  Fig 40: Checking Inclination Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check whether or not the voltage is 5V between the Vic and the GND terminals of the inclination sensor connector.
3. Check the voltage between the OUT and the GND terminals when the inclination sensor is in level position and when it is inclined backward and forward.
  1. Standard Value:
    1. Sensor in Level position: about 4.5V
    2. Sensor inclined: about 0.5V