Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus GS 430 and 2005 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

Check fuses. (GAUGE, MPX-B and DOME fuse)
1. NG: Replace fuse.
2. OK: Go to next step.
Check voltage between terminals MPX+B and GND of combination meter connector.
PREPARATION:
1. Remove combination meter.
2. Disconnect the combination meter connector.
CHECK:

Measure voltage between terminals MPX+B and GND of combination meter connector.

OK:

Voltage: 10 - 14 V

Fig 1: Measuring Voltage Between Terminals MPX+B And GND Of Combination Meter Connector
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1. OK: Proceed to next circuit inspection shown in problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. NG: Go to next step.
Check for open in harness and connector between terminal GND of combination meter and body ground (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG: Repair or replace harness or connector.
2. OK: Check and repair harness and connector between combination meter and battery.