Combination Meter Circuit Plate

WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

Combination Meter Circuit - Inspect the combination meter circuit. Disconnect connector A and B from the combination meter and inspect the connectors on the wiring harness side. See CONNECTOR IDENTIFICATION . See INSPECTING COMBINATION METER CIRCUIT table. If the circuit is not as specified, inspect the circuits connected to other parts.

INSPECTING COMBINATION METER CIRCUIT

Tester Connection	Condition	Specified Condition
A1 - Ground	Ignition Switch OFF Or ACC	No Voltage
A1 - Ground	Ignition Switch ON	B+ Voltage
A3 - Ground	Constant	B+ Voltage
A8 - Ground	Constant	B+ Voltage
A9 - Ground	Light Control Switch HI Or FLASH	B+ Voltage
A11 - Ground	Constant	Continuity
A12 - Ground	Light Control Switch TAIL Or HEAD	B+ Voltage
A14 - Ground	Constant	B+ Voltage
A15 - Ground	Float Position Of Fuel Sender Gauge Full	Resistance 4 Ohms
A15 - Ground	Float Position Of Fuel Sender Gauge Full	Resistance 107 Ohms
A20 - Ground	Light Control Switch HI Or FLASH	Continuity
A22 - Ground	Constant	Continuity
B2 - Ground	Window Washer Level Warning Switch ON	Continuity
B6 - B7	Rheostat Knob Full Right Turn	Resistance 8-12 k Ohms
B6 - B7	Light Control Rheostat Knob Full Left Turn	Resistance 0 Ohm
B10 - B7	Constant	Resistance 8-12 k Ohms
B14 - B7	Light Control Rheostat Knob Full Left Turn	No Continuity

Instrument Panel Integration ECU Circuit - Inspect the instrument panel integration ECU circuit. Remove the combination meter cover. Inspect the connectors on the ECU as follows. See CONNECTOR IDENTIFICATION . See INSPECTING INSTRUMENT PANEL INTEGRATION ECU CIRCUIT table. If the circuit is not as specified, replace the circuit plate. See COMBINATION METER under REMOVAL & INSTALLATION.

INSPECTING INSTRUMENT PANEL INTEGRATION ECU CIRCUIT

Tester Connection	Specified Condition
E1 - A14	Continuity
E2 - A14	Continuity
E3 - A1	Continuity
E4 - A1	Continuity
E11 - A22	Continuity
E12 - A22	Continuity
E13 - A22	Continuity
E14 - A11	Continuity
F1 - C10	Continuity
F2 - C11	Continuity
F3 - C12	Continuity
F4 - C13	Continuity
F5 - C14	Continuity
F6 - C16	Continuity
F7 - C18	Continuity
F8 - A9	Continuity
F10 - A20	Continuity
F9 - A8	Continuity
F12 - A6	Continuity
F13 - B2	Continuity
F14 - A10	Continuity

Combination Meter ECU Circuit - Inspect the combination meter ECU circuit. Remove the combination meter cover. Inspect the connectors on the instrument panel integration ECU as follows. See CONNECTOR IDENTIFICATION . See INSPECTING COMBINATION METER ECU CIRCUIT table. If the circuit is not as specified, replace the bulb or combination meter ECU.

INSPECTING COMBINATION METER ECU CIRCUIT

Tester Connection	Check Indicator Light Circuit	Specified Condition
F1 - E11, E12, E13	Right Turn Signal Indicator Light	Continuity
F2 - E11, E12, E13	Left Turn Signal Indicator Light	Continuity
F3 - E3, E4	SLIP Indicator Light	Continuity
F4 - E3, E4	TRAC OFF Indicator Light	Continuity
F5 - E3, E4	CRUISE MAIN Indicator Light	Continuity
F6 - E3, E4	Malfunction Indicator Light	Continuity
F7 - E3, E4	ABS Warning Light	Continuity
F8 - F10	HI-Beam Indicator Light	Continuity
F9 - F14	SRS Indicator Light	Continuity
F12 - E3, E4	O/D OFF Indicator Light	Continuity
F13 - E3, E4	Washer Level Warning Light	Continuity