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Home >> Lexus >> 2005 >> GX 470 V8-4.7L (2UZ-FE) >> Repair and Diagnosis >> Instrument Panel, Gauges and Warning Indicators >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> On-Vehicle Inspection

On-Vehicle Inspection

ON-VEHICLE INSPECTION
1. INSPECT SPEEDOMETER
(a) Check the operation.

Reference: mph (U.S.A):




Reference: km/h (Canada):




(1) Using a speedometer tester, check the speedometer indication according to the tables provided.

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

(2) Check the deviation from the acceptable value of the speedometer indication.
Reference: Below 0.5 km/h (0.3 mph)




2. INSPECT OUTPUT SIGNAL OF VEHICLE SPEED
(a) Check for standard signal.
(1) While driving the vehicle at the speed of 10 km/h (6 mph), check the voltage between the terminals C11-15 of the combination meter assembly and body ground.
Standard: Fluctuation between 10 to 14 V or less is repeated 7 times within 1 second.

NOTICE: Check it with the ignition switch ON and the connector connected.

3. INSPECT TACHOMETER
(a) Check the operation
(1) Connect a tune-up test tachometer, and start the engine.

NOTICE:
- 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 test and tachometer indications.
DC 13.5 V, at 25°C (77°F)




4. INSPECT FUEL RECEIVER GAUGE
(a) Inspect the circuit.
(1) Disconnect the connector from the sender gauge.
(2) Turn the ignition switch ON, then check the position of the receiver gauge needle.
OK: Needle position is on EMPTY

(3) Connect terminals 2 and 3 on the wire harness side connector and turn the ignition switch ON, then check the position of the receiver gauge needle.
OK: Needle position is on FULL

5. INSPECT FUEL LEVEL WARNING LIGHT
(a) Inspect the circuit.
(1) Disconnect the connector from the sender gauge.
(2) Turn the ignition switch ON, check the fuel level needle and fuel level warning light.
OK: Needle position is on EMPTY and fuel level warning light comes on.

6. INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE WARNING LIGHT
(a) Inspect the circuit.
(1) Disconnect the connector from the sender gauge.
(2) Turn the ignition switch ON, check the position of the water temperature receiver gauge needle.
OK: Needle position is on COOL
(3) Ground terminal 2 on the wire harness side, then check the position of the water temperature receiver gauge needle.
OK: Needle position is on HOT

7. INSPECT SEAT BELT WARNING LIGHT (DRIVER SIDE)
(a) Check the operation.
(1) Turn the ignition switch ON and check that the warning light.
OK: Seat belt warning light comes on
(2) Fasten the outer belt to the inner belt and check that the warning light.
OK: Seat belt warning light goes off
(3) Disconnect the connector from the buckle switch and ground terminal on the wire harness side connector.
(4) Turn the ignition switch ON and check that the warning light.
OK: Seat belt warning light comes on

8. INSPECT LOW OIL PRESSURE WARNING LIGHT
(a) Inspect the circuit.
(1) Disconnect the connector from the low oil pressure switch.
(2) Turn the ignition switch ON.
(3) Connect the terminal of wire harness side connector and ground, then check the warning low oil pressure warning light.
OK: Low oil pressure warning light comes on

9. INSPECT BRAKE WARNING LIGHT
(a) Inspect the parking brake warning light.
(1) Disconnect the connector from the parking brake switch and ground terminal on the wire harness side connector.
(2) Turn the ignition switch ON and check that the warning light lights up.
OK: Parking brake warning light comes on

(b) Inspect the brake fluid level warning light.
(1) Disconnect the connector from the brake fluid level warning switch and connect terminals on the wire harness side connector.
OK: Brake fluid level warning light comes on
(2) Turn the ignition switch ON and check that the warning light lights up.

10. INSPECT BRAKE FLUID LEVEL WARNING SWITCH
(a) Inspect the continuity.
(1) Remove the reservoir tank cap and strainer.
(2) Disconnect the connector.
(3) Check that the continuity exists between the terminals.
Float up (switch off): No continuity
(4) Use syphon, etc., to take fluid out of the reservoir tank.
(5) Check that the continuity exists between the terminals.
Float down (switch on): Continuity

11. INSPECT KEY REMINDER WARNING BUZZER
(a) Check warning buzzer function.
(1) Turn the ignition switch ON and check that the key reminder warning sounds if the ignition key is inserted in the key cylinder and the front driver side door is opened.

OK: Key reminder warning buzzer sounds

Indicator Condition:




12. MAINTENANCE LIQUID RESETTING PROCEDURE
(a) Set tne display window to ODO.
(b) Turn the ignition switch off.
(c) While pressing the reset switch, turn the ignition switch to ON. Keep pressing the reset switch for at least 5 seconds to complete the reset procedure. Check that the "OIL MAI NT" indicator light goes off.

HINT:
- If the ignition switch is turned off during the reset procedure:
LCD: off
IND: off
- If the reset switch is not pressed for at least 5 seconds during the reset procedure:
LCD: return to ODO
IND: previous state



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