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 combination 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 IG2 when the ignition switch is turned on, the indicator will not operate.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSES (MET, ECU-B, AM2)

(a) Remove the MET fuse from the main body ECU.
(b) Remove the ECU-B and AM2 fuse from the engine room relay block.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:

(d) Reinstall the fuses.
NG -- REPLACE FUSE
OK -- Continue to next step.
2. INSPECT INTEGRATION NO.2 RELAY (IG2 RELAY)

(a) Remove the integration relay from the engine room relay block Removal.
(b) Measure the resistance to the value(s) in the table below.
Standard resistance:

(c) Reinstall the integration relay.
NG -- REPLACE INTEGRATION NO.2 RELAY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the F1 combination meter assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:

(d) Reconnect the combination meter assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE COMBINATION METER ASSEMBLY