Pinpoint Test B: A Virtual Gauge (AWD (All-Wheel Drive), Speedometer, Tachometer Or Temperature), Is Inoperative: Notes

Normal Operation and Fault Conditions

AWD Gauge

If the AWD locking status, wheel torque or vehicle speed messages are missing for less than 5 seconds or if the IPC receives invalid torque data for less than 5 seconds, the IPC defaults the display fill area in front of the front wheels and behind the rear wheels to the last setting based upon that last message received.
If the IPC does not receive the AWD locking status, wheel torque or vehicle speed messages for 5 seconds or longer, the IPC defaults the display fill area in front of the front wheels and behind the rear wheels off.

Speedometer

If the vehicle speed message is missing for less than 5 seconds, the IPC defaults the speedometer to the last indication state, based upon the last message received.
If the vehicle speed message is missing for 5 seconds or longer, the IPC defaults the speedometer to 0 km/h (0 mph).

Tachometer

If the engine rpm message is missing for less than 5 seconds, the IPC defaults the tachometer to the last indication state, based upon the last message received.
If the engine rpm message is missing for 5 seconds or longer, the IPC defaults the tachometer to 0 rpm.

Temperature Gauge

If the engine coolant temperature data or engine overheat indication request messages are missing for less than 5 seconds, the IPC defaults the temperature gauge to the last indication state, based upon the last message received.
If the engine coolant temperature data or engine overheat indication request messages are missing for 5 seconds or longer, the IPC defaults the temperature gauge to the full hot position.

Possible Sources