Self-diagnostic Function: Notes

NOTE: Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A )

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 segments check
The gauges drive circuit check (Tachometer, Fuel gauge. Speedometer, Engine coolant temperature gauge)
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