Combination Meter: Inspection

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 in the table.

Fig 1: Identifying Connectors
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Fig 2: Tester Connection Specified Condition (1 Of 2)
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Fig 3: Tester Connection Specified Condition (2 Of 2)
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If circuit is not as specified, and 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.

HINT:

Tire wear and tire over-or under-inflation will widen the indication error range.

SPEEDOMETER SPECIFICATION

USA (mph)		CANADA and TAIWAN (km/h)
Standard indication	Allowable range	Standard indication	Allowable range
20	18 - 24	20	17- 24
40	38 - 44	40	38 - 46
60	56 - 66	60	57.5 - 67
80	78 - 88	80	77- 88
100	98 - 110	100	96 - 109
120	118 - 132	120	115 - 130
		140	134- 151.5
		160	153 - 173

If the error exceeds the allowable range, replace the speedometer.

INSPECT SPEEDOMETER VOLTAGE
While driving the vehicle at the speed of 10 km/h, check the voltage between the terminal 6 and 11 of the combination meter assy.

STANDARD: Fluctuation between 10 V to 14 V or less is repeated 7 times within 1 sec.

Fig 4: Checking Voltage Between Terminal 6 And 11 Of Combination Meter Assy
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INSPECT VEHICLE SPEED SENSOR OPERATION
1. Connect the battery positive (+) lead to terminal 1 and the battery negative (-) lead to terminal 2.
2. Connect the tester positive (+) lead to terminal 3 and the tester negative (-) lead to terminal 2.
  
  Fig 5: Identifying Vehicle Speed Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Rotate the shaft.
4. Check that there is voltage change from approx. 0V to 11 V or more between terminals 2 and 3.
HINT:

The voltage change should be performed 4 times for every revolution. If it doesn't, replace the sensor.

INSPECT TACHOMETER/ON-VEHICLE

Connect a tune-up test tachometer, and start the engine.
NOTE:
- Reversing the connection of the tachometer will damage the transistors and the diodes inside.
- When removing or installing the tachometer, be careful not to drop it or give it heavy shocks.
Compare the tester and the tachometer indications.

DC13.5V25°C at (77°F):

TACHOMETER SPECIFICATION

Standard indication	Allowable range
700	617 - 757
1,000	881) - (1,081)
2,000	1,837) - (2,087)
3,000	2,793 - 3,093
4,000	3,775) - (4,075)
5,000	4,756 - 5,058

INSPECT FUEL SENDER GAUGE VOLTAGE

Apply voltage between terminal 2 and 3.
Measure voltage between terminal 1 and 2 for each floating position.

FUEL GAUGE SPECIFICATION

Float position mm (in.)	Voltage (V)
F: Approx. 85.3 (3.36)	Approx. 4.6 +/- 0.1
1/2: Approx. 1.7(0.67)	Approx. 2.45 +/- 0.1
E: Approx. 91.9(3.62)	Approx. 0.3 +/- 0.1

If voltage value is not as specified, replace the sender gauge.

Fig 6: Inspecting Fuel Sender Gauge Voltage

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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 7: Identifying Engine Coolant Temperature Circuit & Sender Gauge Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Ground terminal on the wire harness side connector through a 3.4-W test bulb.
4. Turn the ignition switch ON, and check that the bulb comes on 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.

Fig 8: Testing Engine Coolant Temperature Gauge
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INSPECT ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE

Connect the wire harness as shown in the illustration, and enter the value using the formula on the left. Check the resistance is within the values in the table below.

ENGINE COOLANT TEMPERATURE

Temperature °C (°F)	Resistance (Ω)
50(122.0)	160 - 240
120(248.0)	17.1 -21.2

If resistance value is not as specified, replace the engine coolant temperature sender gauge.

Fig 9: Checking Engine Coolant Temperature Sender Gauge Resistance

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INSPECT OIL PRESSURE 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 LOW.
  
  Fig 10: Disconnecting Connector From Sender Gauge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Ground terminal on the wire harness side through a 3.4 W test bulb.
4. Turn the ignition switch ON and check that the bulb lights up and the receiver gauge needle moves to the HIGH side.
If operation is not as specified, measure the receiver gauge resistance.

Fig 11: Inspecting Oil Pressure Receiver Gauge Operation
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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.
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 flash should vary with engine speed.
Fig 12: Inspecting Oil Pressure Sender Gauge Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
4. Start the engine, check that the warning light comes on.
If the warning light does not come on, test the bulb or the wire harness.

Fig 13: Connecting Terminals On Wire Harness Side Of Level Warning Switch Connector
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INSPECT BRAKE FLUID LEVEL WARNING SWITCH CONTINUITY
1. Remove the reservoir tank cap and the strainer.
2. Disconnect the connector.
3. Check that no continuity exists between the terminals with the switch OFF (float up).
4. Use a 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.

Fig 14: Identifying Brake Fluid Level Warning Switch Connector
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INSPECT PARKING BRAKE SWITCH CONTINUITY
1. Check that continuity exists between the terminal and the switch body with the switch ON (switch pin released).
2. Check that no continuity exists between the terminal and the switch body with the switch OFF (switch pin pushed in).
If operation is not as specified, replace the switch or inspect the grounding point.

Fig 15: Checking Continuity Between Terminal And Switch Body
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INSPECT OPEN DOOR WARNING LIGHT
1. Disconnect the connector from the driver door courtesy switch, and ground terminal on the wire harness side connector.
2. Turn the ignition switch ON and check that the warning light lights up.
INSPECT SEAT BELT WARNING BUZZER
1. Disconnect the connector from the combination meter.
2. Connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead terminal 11.
3. Check that the buzzer stop after 4 to 8 seconds.
4. Check that buzzer stops when connecting the terminal 20 to the GND.
Fig 16: Identifying Terminals In Connectors D & C
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INSPECT KEY UNLOCK WARNING BUZZER
1. Disconnect the connector from the combination meter.
2. Connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 11.
3. Connect the battery negative (-) lead to terminal 19 and 20, and check that the buzzer sound.
Fig 17: Identifying Terminals In Connector D
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INSPECT SEAT BELT WARNING LIGHT
1. Disconnect the connector from the seat belt buckle switch and ground terminal on the wire harness side connector.
2. Turn the ignition switch ON and check that the warning light comes on.

INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY

SEAT BUCKLE SPECIFICATION

	Tester connection	Belt fastened (Belt unfastened)
Seat belt buckle SW (D)	1 - 4	ON (OFF)
Seat belt buckle SW (P)	2-4	OFF (ON)

If operation is not as specified, replace the switch.

Fig 18: Inspecting Seat Belt Buckle Switch Continuity

INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT

Disconnect the switch connector and inspect the connector on the wire harness side, as shown.

Fig 19: Identifying Connector

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
4 - Ground	Always	Continuity

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 terminal 1 and 2 when pressing the sensing part.

If operation is not as specified, replace the sensor.

Fig 20: Checking Continuity Between Terminal 1 And 2
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INSPECT LIGHT CONTROL RHEOSTAT
1. Turn the rheostat knob to OFF, and check that there is no continuity between terminal 5 and 4 (Rheostat knob turned fully counterclockwise).
2. Gradually, turn the rheostat knob from the dark side to the bright side, and check that there is continuity between terminal 5 and 4 (Rheostat knob turned clockwise).
If operation is not as specified, replace the rheostat.

Fig 21: Identifying Rheostat & Connector
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INSPECT INCLINATION SENSOR
1. With the combination meter in which the inclination sensor installed, connect the battery positive (+) lead to terminal 1 (IGN+) of the meter connector, and the battery negative (-) lead to terminal 11 (E/G EARTH).
2. Check if the voltage is 5V between terminal Vcc and GND of the inclination sensor connector.
3. Check the voltage between terminal OUT and GND when the inclination sensor is in level position and when it is inclined backward and forward.
  Standard Value:
  
  Sensor in level position about 4.5V
  
  Sensor inclined about 0.5V
Fig 22: Locating Indication Sensor
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INSPECT WINDOW WASHER LEVEL WARNING LIGHT
1. Disconnect the connector from the warning switch and ground terminal on the wire harness side connector.
2. Run the engine and check that the warning light comes on.
If the warning light does not come on, inspect the bulb or the wire harness.

Fig 23: Checking Window Washer Level Warning Light
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INSPECT WINDOW WASHER LEVEL WARNING SWITCH CONTINUITY
1. Check that no continuity exists between the terminals with the switch OFF (float up).
2. Check that continuity exists between the terminals with the switch ON (float down).
If operation is not as specified, replace the switch or inspect grounding point.

Fig 24: Checking Continuity Between Terminals
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