Lexus IS250 IS220d GSE20 ALE20 - METER
INSPECT COMBINATION METER ASSEMBLY
METER / GAUGE SYSTEM - Entire Combination Meter does not Operate
DESCRIPTION
This circuit is the power source circuit for the meter.
This circuit provides two types of power sources; one is a constant power source mainly used as a backup power source, and the other is a power source mainly used for signal transmission. The constant power source is mainly used as a backup power source of the meter CPU, however, it is also used for communication.
If a voltage of 12 V is not applied to terminal IG+ when the engine switch is on (IG), the indicator will not operate.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.INSPECT COMBINATION METER ASSEMBLY |
Disconnect the J34 connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition J34-1 (E2) -
Body groundAlways Below 1 Ω C34-13 (ES) -
Body groundAlways Below 1 Ω
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection Condition Specified Condition J34-12 (IG+) -
Body groundEngine switch on (IG) 10 to 14V J34-23 (B) -
Body groundAlways 10 to 14 V J34-24 (B) -
Body groundAlways 10 to 14 V
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