Self-diagnostic Function: Notes

Before troubleshooting the gauge system, refer to multiplex integrated control system 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.

• The beeper drive circuit check.
• The indicator drive circuit check.
• The switch input test.
• The LCD segments check.
• The gauges drive circuit check (Speedometer, Tachometer, Fuel gauge, 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).