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Fig. 86: Identifying Terminal C12-19
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: GO TO NEXT STEP
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7.REPLACE DRIVER SIDE JUNCTION BLOCK
OK:
Normal operation
NG: REPLACE COMBINATION METER ASSY (SEE OVERHAUL
)
OK: END
1.INSPECT SPEEDOMETER
a. Check the operation.
b. Using a speedometer tester, inspect the speedometer for acceptable indication error and check the
operation of the odometer.
REFERENCE: KM/H (CANADA)
SPEEDOMETER ACCEPTABLE INDICATION
REFERENCE: MPH (U.S.A)
SPEEDOMETER ACCEPTABLE INDICATION
Standard indicationAcceptable range
20 km/h18.0 to 23.0 km/h
40 km/h38.0 to 42.0 km/h
60 km/h57.0 to 61.5 km/h
80 km/h76.5 to 81.5 km/h
100 km/h96.5 to 101.5 km/h
120 km/h116.0 to 121.5 km/h
140 km/h136.0 to 142.0 km/h
160 km/h155.5 to 162.5 km/h
180 km/h175.0 to 183.0 km/h
200 km/h194.5 to 203.5 km/h
Standard indicationAcceptable range
20 mph18.5 to 21.5 mph
40 mph38.5 to 41.5 mph
60 mph59.0 to 62.5 mph
80 mph79.0 to 83.0 mph
100 mph99.0 to 104.0 mph
120 mph119.0 to 125.0 mph
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c. Check the deflection width of the speedometer indicator.
Reference: Below 0.5 km/h (0.3 mph)
2.INSPECT OUTPUT OF VEHICLE SPEED
a. Check the output signal waveform.
1. Remove the combination meter assy.
2. Connect the oscilloscope to terminal C12-19 and body ground.
3. Start the engine.
Fig. 87: Identifying Terminal C12
-19
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4. Check the signal waveform according to the condition (s) in the table below.
SIGNAL WAVEFORM CONDITIONS
ItemCondition
Tool setting5 V/DIV, 20 ms/DIV
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OK:
As shown in the illustration
HINT:
As vehicle speed increases, the cycle of the signal waveform narrows.
Fig. 88: Identifying Signal Waveform
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.INSPECT TACHOMETER
a. Check operation
b. Connect the tune-up test tachometer and start the engine.
Vehicle conditionDriving at approx. 20 Km/h (12 mph)
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c. Compare the result of the test with the standard indication.
DC 13.5 V, 25°C (77°F)
Fig. 89: Tachometer Acceptable Reference Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4.INSPECT FUEL RECEIVER GAUGE
a. Disconnect the connector from the sender gauge.
b. Connect terminals 1 and 2 on the wire harness side connector of the fuel sender gauge.
c. Turn the ignition switch to the ON position, then check the position of the receiver gauge needle.
OK:
Needle position is on (EMPTY).
d. Connect terminals 2 and 3 on the wire harness side connector of the fuel sender gauge.
e. Turn the i
gnition switch to the ON position, then check the position of the receiver gauge needle.
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Fig. 90: Identifying Fuel Sender Gauge Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK:
Needle position is on (FULL).
5.INSPECT FUEL LEVEL WARNING
a. Disconnect the connector from the sender gauge.
b. Turn the ignition switch to the ON position, then check that the fuel level needle indicates EMPTY
and the fuel level warning light comes on.
OK:
Fuel level warning light comes on.
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6.INSPECT LOW OIL PRESSURE WARNING LIGHT
a. Disconnect the connector from the low oil pressure switch.
b. Turn the ignition switch to the ON position.
c. Ground the terminal of the wire harness side connector, then check the low oil pressure warning
light.
OK:
Low oil pressure warning light comes on.
7.INSPECT BRAKE WARNING LIGHT
a. Inspect the parking brake warning light.
1. Disconnect the connector from the parking brake switch
2. Turn the ignition switch to the ON position.
3. Ground the terminal of the wire harness side connector, then check the parking brake
warning light.
OK:
Brake warning light comes on.
b. Inspect the brake fluid level warning light.
1. Disconnect the connector from the brake fluid level warning switch.
2. Turn the ignition switch to the ON position.
3. Connect a terminal to the other terminal of the wire harness side connector, then check the
brake fluid level warning switch.
OK:
Brake warning light comes on.
8.INSPECT BRAKE FLUID LEVEL WARNING SWITCH
a. Remove the reservoir tank cap and strainer.
b. Disconnect the connector.
c. Measure the resistance between the terminals.
Standard:
Float up (switch off): 10 kohms or higher
d. Use a syphon, etc. to take fluid out of the reservoir tank.
e. Measure the resistance between the terminals.
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Standard:
Float down (switch on): Below 1 ohms
f. Pour the fluid back in the reservoir tank.
9.INSPECT WASHER LEVEL WARNING SWITCH
a. Disconnect the connector from the washer level warning switch.
b. Turn the ignition switch to the ON position.
c. Ground the terminal of the wire harness side connector, then check the washer level warning light.
OK:
Washer level warning light comes on.
10.MAINTENANCE LIQUID RESETTING PROCEDURE
a. Check that the display for ODO/TRIP shows no value (BLANK).
b. Turn the ignition switch off.
c. Pressing the reset switch, turn the ignition switch to the ON (keep pressing at least for 5 seconds).
d. The reset procedure is completed.
HINT:
During reset procedure:
"Mileage Reset" is displayed and the master warning light comes on with a buzzer sound.
Completion of reset procedure:
"Mileage Reset" and the master warning light go off.
If the ignition switch is turned off during reset procedure, reset mode is canceled.
If the reset switch is turned off during the reset procedure, reset mode is canceled and the display
shows the condition prior to the reset procedure.
If "Maint Reqd Soon" is displayed, it goes off 15 seconds after turning the ignition switch to the
ON position.