Entire Combination Meter Does Not Operate

METER: METER / GAUGE SYSTEM: Entire Combination Meter does not Operate
- Entire Combination Meter does not Operate

DESCRIPTION

This circuit is the power source circuit for the No. 1 meter ECU. This circuit provides 2 power source types: 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 IG2 when the engine switch is on (IG), the indicator will not operate.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (D MPX-B2, P-J/B)

(a) Remove the D MPX-B2 fuse from the main body ECU.

(b) Remove the P-J/B fuse from the engine room No. 2 relay block.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (NO. 1 METER ECU - BATTERY AND BODY GROUND)

(a) Disconnect the L10 ECU connector.





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

Standard resistance:

Standard voltage










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE NO. 1 METER ECU Disassembly