Toyota Tundra Service Manual: Voltage Meter Malfunction

DESCRIPTION

The voltmeter indicates the voltage applied to the IG+ terminal of the combination meter assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing procedure.

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM (VOLTMETER)

(a) Operate the Techstream according to the display and select "Active Test" (See page ).

Combination Meter:

Tester Display	Test Part	Control Range	Diagnostic Note
Volt Meter Operation	Voltmeter	OFF, 0 V, 3 V, 6V , 9 V, 12 V, 15 V or 18 V	Perform the test with the vehicle stopped and engine idling

OK:

Needle indication is normal.

REPLACE COMBINATION METER ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)

*a	Rear view of wire harness connector (to Combination Meter Assembly)

(a) Disconnect the J28 combination meter assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
J28-24 (ES) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
J28-2 (IG+) - Body ground	Ignition switch ON	11 to 14 V
J28-2 (IG+) - Body ground	Ignition switch off	Below 1 V

REPLACE COMBINATION METER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Toyota Tundra Service Manual > Occupant Classification System: Rear Occupant Classification Sensor RH Circuit Malfunction (B1783)
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Toyota Tundra Owners Manual