Combination Meter: Inspection

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.

SPEEDOMETER

Standard indication (mph)	Allowable range (mph)
20	18 - 24
40	38 - 44
60	58 - 66
80	78 - 88
100	98 - 110
120	118 - 132

If the error is excessive, replace the combination meter.

Inspect Speedometer Resistance

Measure the resistance between terminals with an ohmmeter at the positions shown in the illustration.

Fig 1: Identifying Speedometer Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RESISTANCE CHECKING

Tester connection	Resistance (Q)
A - B	250
C - D	250

If the resistance value is not as specified, replace the combination meter.

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 diodes inside.

Compare the tester indications with tachometer indications.

RPM (DC 13.5 V, 25°C (77°F))

TACHOMETER ON VEHICLE

Standard indication (rpm)	Allowable range (rpm)
700	630 - 770
1,000	900 - 1,100
2,000	1,850-2,150
3,000	2,800 - 3,200
4,000	3,800 - 4,200
5,000	4,800 - 5,200
6,000	5,800 - 6,200
7,000	6,800 - 7,200

If the error is excessive, replace the combination meter.

Inspect Tachometer Resistance

Measure the resistance between terminals with an ohmmeter at the positions shown in the illustration.

Fig 2: Identifying Tachometer Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RESISTANCE TESTING

Tester connection	Resistance (Ω)
A - B	250
C - D	250

If the resistance value is not as specified, replace the combination meter.

Inspect Fuel Receiver Gauge Operation
1. Disconnect the connector from the fuel pump assembly.
2. Turn the ignition switch ON, check that the receiver gauge needle indicates EMPTY.
  
  Fig 3: Fuel Receiver Gauge Circuit Schematic
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect terminals 2 and 3 of the wire harness side connector through a 3.4 W test bulb.
4. Turn the ignition switch ON, check that the bulb lights up and receiver gauge needle indicators EMPTY.
  If the operation is not as specified, inspect the sender gauge resistance.
  
  Fig 4: Testing Fuel Receiver Gauge
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect Fuel Receiver Gauge Resistance

Measure the resistance between terminals with an ohmmeter at the positions shown in the illustration.

Fig 5: Identifying Fuel Receiver Gauge Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RESISTANCE TESTING

Tester connection	Resistance (Ω)
A - B	250
C - D	250

If the resistance value is not as specified, replace the combination meter.

Inspect Fuel Sender Gauge Resistance

Measure the resistance between terminals 2 and 3 for each float position.

Fig 6: Measuring Resistance Between Terminals 2 & 3

FLOAT POISTION

Float position: mm (in.)	Resistance (Ω)
F: Approx. 68.8(2.71)	Approx. 16.4
E: Approx. 207.4(8.17)	Approx. 192.7

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

Inspect Engine Coolant Temperature Receiver Gauge Resistance

Fig 7: Identifying Engine Coolant Temperature Receiver Gauge Terminals

Measure the resistance between terminals with fixing pointer to the stopper.

RESISTANCE TESTING

Tester connection	Resistance (Ω)
A - B	250
C - D	250

If the resistance value is not as specified, replace the combination meter.

Inspect Low Oil Pressure Warning Light
1. Disconnect the connector from the warning switch and ground terminal of the wire harness side connector.
2. Turn the ignition switch ON, check that the warning light lights up.
  If the warning light does not light up, test the LED or inspect wire harness.
Inspect Low Oil Pressure Switch Continuity
1. Check that continuity exists between terminal and ground with the engine stopped.
  
  Fig 9: Checking Oil Pressure Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that no continuity exists between terminal and ground with the engine running.
  NOTE: The oil pressure should be over 24.5 kPa (0.25 kgf/cm² , 3.55 psi).
  
  If the operation is not as specified, replace the switch.
Inspect Brake Warning System Light

Fig 10: Testing Brake Warning System Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the connector from the brake fluid warning switch.
2. Connect terminals of the wire harness side of the level warning switch connector.
3. Start the engine, check that the warning light lights up.
  If the warning light does not light up, test the LED or wire harness.
Inspect Brake Fluid Level Warning Switch Continuity
1. Remove the reservoir cap and strainer.
2. Disconnect the connector.
3. Check that no continuity exists between terminals with the switch OFF (float up).
  
  Fig 11: Inspecting Brakes Fluid Level Warning Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Use syphon, etc. to take fluid out of the reservoir.
5. Check that continuity exists between terminals with the switch ON (float down).
6. Pour the fluid back in the reservoir.
  If the operation is not as specified, replace the switch.
Inspect Parking Brake Warning Light
1. Disconnect the connector from the parking brake switch.
2. Ground terminal of the wire harness side connector.
  
  Fig 12: Checking Brake Warning Parking Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Start the engine, check that the warning light lights up.
  If the warning light does not light up, test the LED or inspect wire harness.
Inspect Parking Brake Switch Continuity

Fig 13: Inspecting Parking Brake Switch Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Check that continuity exists between terminal and switch body with the switch ON (switch pin released).
2. Check that no continuity exists between terminal and switch body with the switch OFF (switch pin pushed in).
  If the operation is not as specified, replace the switch or inspect ground point.
Inspect Open Door Warning Light

Fig 14: Checking Open Door Warning Light Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the connector from the door courtesy switch.
2. Ground terminal of the wire harness side connector.
3. Start the engine, check that the warning light lights up.
  If the warning light does not light up, test the LED or inspect wire harness.
Driver's Side: Inspect Seat Belt Warning Light

Fig 15: Inspecting Seat Belt Warning Light Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the connector from buckle switch and ground terminal on the wire harness side connector.
2. Turn the ignition switch ON and check that the warning light lights up.
  If the warning light does not light up, test the LED or inspect wire harness.
Driver's Side: Inspect Buckle Switch Continuity (See INSPECTION )
Passenger's Side: Inspect Buckle Switch Continuity
1. Check that continuity exists between terminals 1 and 3 the switch side connectors with the switch OFF (belt fastened).
  
  Fig 16: Checking Buckle Switch ON & OFF
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that no continuity exists between terminals 1 and 3 the switch side connectors with the switch ON (belt unfastened).
  If the operation is not as specified, replace the switch.
Passenger's Seat Only: Inspect Seat Belt Warning Occupant Detection Sensor Continuity
Check that continuity exists between terminals 1 and 2 when pressing the sensing part.

Fig 17: Inspecting Passenger's Seat Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the operation is not as specified, replace the seat cushion pad with sensor.
Inspect Light Control Rheostat Operation
Gradually, turn the rheostat knob from the bright side to the dark side and check that the resistance decreases from 10 kΩ to 0 Ω between terminals 4 and 5. (Rheostat knob turned to clockwise)

Fig 18: Identifying Light Control Rheostat Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the operation is not as specified, replace the light control rheostat.