Self-diagnostic Function: Notes

NOTE: Before doing the self-diagnostic function, make sure the No. 1 (10 A) and the No. 22 (7.5 A) fuse in the under-dash fuse/relay box are OK.

The gauge control module has a self-diagnostic function which consists of the following checks:

The beeper drive circuit check.
The indicator drive circuit check.
The switch input test.
The LCD segment check.
The gauges drive circuit check (tachometer, fuel gauge, speedometer).
The communication line check (of the body-controller area network (B-CAN) communication line and the fast-controller area network (F-CAN) communication line between the gauges).

NOTE: Indicators are also controlled via the communication line.