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Section 491 (Combination Meter): Inspection

WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

CHECK COMBINATION METER CIRCUIT

Check the meter terminals with the connectors connected.

Fig 1: Checking Combination Meter Terminals

G02926383

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Tester Connection Specified Condition Table

G02926384

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

^*1 : w/ ABS
^*2 : w/o ABS

^*3 : Reference the oscilloscope data in OSCILLOSCOPE DATA .

Fig 3: Oscilloscope Data Chart

G02926385

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OSCILLOSCOPE DATA

Item	Contents
Tool setting	10 V/DIV, 20 ms/DIV
Vehicle condition	Engine idle speed

^*4 : Reference the oscilloscope data in OSCILLOSCOPE DATA .

Fig 4: Oscilloscope Data Chart

G02926386

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OSCILLOSCOPE DATA

Item	Contents
Tool setting	10V/DIV, 20ms/DIV
Vehicle condition	Engine idle speed

^*5 : Reference the oscilloscope data in OSCILLOSCOPE DATA .

Fig 5: Oscilloscope Data Chart

G02926387

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OSCILLOSCOPE DATA

Item	Contents
Tool setting	5V/DIV, 100ms/DIV
Vehicle condition	Ignition switch ON

"A" changes according to the coolant temperature.

COOLANT TEMPERATURE CHANGES

Coolant Temperature	A
30°C (86°F) or less	Approx. 82 ms
Approx. 75°C (167°F)	Approx. 377 ms
90°C (194°F) or more	Approx. 410 ms

CHECK SPEEDOMETER ON-VEHICLE

Using a speedometer tester, check if the speedometer reading is within the allowable range, and check operation of the odometer.

HINT:

Tire wear and tire over inflation/under inflation will skew speedometer tester reading.

SPEEDOMETER ALLOWABLE RANGES

USA (mph)		CANADA (km/h)
Standard indication	Allowable range	Standard indication	Allowable range
20	18 - 24	20	17 - 24
40	38 - 44	40	38 - 46
60	58 - 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 indicated value is out of the allowable range, replace the combination meter (see REMOVAL ).

CHECK 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 reading with the tachometer reading.

RPM (DC 13.5 V, 25°C (77°F))

( ): Reference

TACHOMETER ALLOWABLE RANGE

Standard Indication	Allowable Range
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)	(5,750 - 6,250)
7,000	6,700 - 7,300

If the indicated value is out of the allowable range, replace the combination meter (see REMOVAL ).

CHECK FUEL RECEIVER GAUGE OPERATION
HINT:

Park the vehicle in a flat area.
1. Disconnect the connector from the main fuel pump assembly.
2. Turn the ignition switch ON and check if the receiver gauge needle indicates EMPTY.
3. Connect terminals 2 and 3 of the wire harness side connector with a 3.4 W test bulb.
4. Turn the ignition switch ON and check if the bulb lights up and the receiver gauge needle indicates FULL.
  If operation is not as specified, inspect the main fuel sender gauge and sub sender gauge resistance.

INSPECT MAIN FUEL SENDER GAUGE RESISTANCE

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

Fig 8: Inspecting Main Fuel Sender Gauge Resistance

G02926390

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

MAIN FUEL SENDER GAUGE RESISTANCE

Float Position: mm (in.)	Resistance (Ω)
F: Approx. 70.0 (2.76)	Approx. 2
E: Approx. 167.6 (6.60)	Approx. 54

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

INSPECT SUB FUEL SENDER GAUGE RESISTANCE

Measure the resistance between terminals 1 and 2 for each float position.

Fig 9: Inspecting Sub Fuel Sender Gauge Resistance

G02926391

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

SUB FUEL SENDER GAUGE RESISTANCE

Float Position: mm (in.)	Resistance (Ω)
F: Approx. 52.1 (2.05)	Approx. 2
E: Approx. 177.0 (6.97)	Approx. 53

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

CHECK 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 and check if the warning light lights up.
  
  Fig 10: Checking Low Oil Pressure Warning Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the warning light does not light up, test the LED or inspect the wire harness.
INSPECT LOW OIL PRESSURE SWITCH CONTINUITY
1. Check if continuity exists between the terminal and ground with the engine stopped.
2. Check if no continuity exists between the terminal and ground with the engine running.
  
  Fig 11: Checking Low Oil Pressure Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  The oil pressure should be over 24.5 kPa (0.25 kgf/cm² , 3.55 psi).
  
  If operation is not as specified, replace the switch.
CHECK BRAKE WARNING SYSTEM LIGHT
1. Disconnect the connector from the brake fluid warning switch.
2. Connect the terminals of the level warning switch wire harness side connector.
3. Start the engine. Check if the warning light lights up.
  
  Fig 12: Checking Brake Warning System Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the warning light does not light up, test the LED or inspect the wire harness.
CHECK BRAKE FLUID LEVEL WARNING SWITCH CONTINUITY
1. Remove the reservoir cap and strainer.
2. Disconnect the connector.
3. Check if no continuity exists between the terminals with the switch OFF (float up).
4. Use a siphon or other instrument to take fluid out of the reservoir.
5. Check if continuity exists between the terminals with the switch ON (float down).
6. Pour the fluid back in the reservoir.
  
  Fig 13: Checking Brake Fluid Level Warning Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the switch.
CHECK PARKING BRAKE WARNING LIGHT
1. Disconnect the connector from the parking brake switch.
2. Ground the terminal of the wire harness side connector.
3. Start the engine. Check if the warning light lights up.
  
  Fig 14: Checking Parking Brake Warning Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the warning light does not light up, test the LED or inspect the wire harness.
INSPECT PARKING BRAKE SWITCH CONTINUITY
1. Check if continuity exists between the terminal and switch body with the switch ON (switch pin released).
2. Check if no continuity exists between the terminal and switch body with the switch OFF (switch pin pushed in).
  
  Fig 15: Checking Parking Brake Switch Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the switch or inspect the ground point.
Except back door: CHECK OPEN DOOR WARNING LIGHT
1. Disconnect the connector from the door courtesy switch.
2. Ground the terminal of the wire harness side connector.
3. Start the engine. Check if the warning light lights up.
  
  Fig 16: Checking Open Door Warning Light (Except Back Door)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the warning light does not light up, test the LED or inspect the wire harness.
Back door only: CHECK OPEN DOOR WARNING LIGHT
1. Disconnect the connector from the back door courtesy switch and ground the terminal on the wire harness side connector.
2. Start the engine. Check if the warning light lights up.
  
  Fig 17: Checking Open Door Warning Light (Back Door)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the warning light does not light up, test the LED or inspect the wire harness.
Driver's side: CHECK SEAT BELT WARNING LIGHT
1. Disconnect the connector from the buckle switch and ground the terminal on the wire harness side connector.
2. Turn the ignition switch ON and check if the warning light lights up.
  
  Fig 18: Checking Seat Belt Warning Light (Driver's Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the warning light does not light up, test the LED or inspect the wire harness.
Driver's side: INSPECT BUCKLE SWITCH CONTINUITY
1. Check if continuity exists between terminals 2 and 3 of the connector (A) with the switch ON (belt unfastened).
2. Check if no continuity exists between terminals 2 and 3 of the connector (A) with the switch OFF (belt fastened).
  
  Fig 19: Inspecting Buckle Switch Continuity (Driver's Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the continuity is not as specified, replace the switch.
Passenger's side: INSPECT BUCKLE SWITCH CONTINUITY
1. Check if continuity exists between terminals 1 and 2 of the connector (A) with the switch ON (belt unfastened).
2. Check if no continuity exists between terminals 1 and 2 of the connector (A) with the switch OFF (belt fastened).
  
  Fig 20: Inspecting Buckle Switch Continuity (Passenger's Side)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the continuity is not as specified, replace the switch.
Passenger's seat only: INSPECT SEAT BELT WARNING OCCUPANT DETECTION SENSOR CONTINUITY
Press the sensing part and check if continuity exists between terminals 1 and 2.

Fig 21: Inspecting Seat Belt Warning Occupant Detection Sensor Continuity (Passenger's Seat)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the continuity is not as specified, replace the seat cushion pad with sensor.
INSPECT LIGHT CONTROL RHEOSTAT OPERATION
1. Connect the positive (+) lead from the battery to terminal 1 and negative lead (-) to terminal 3.
2. Connect the positive (+) lead from the voltmeter to terminal 2 and negative lead to terminal 3.
3. Turn the rheostat knob and check if the voltage changes.
  
  Fig 22: Inspecting Light Control Rheostat Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the voltage is not as specified, replace the light control rheostat.