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Pinpoint Test C : The Speedometer Is Inoperative: Notes

Normal Operation and Fault Conditions 

See Speedometer. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

If the IPC operating voltage is above 16 volts or below 9 volts for one second or longer, the IPC defaults the speedometer to 0 km/h (0 mph).

If the BCM does not receive the vehicle speed message from the ABS module for more than 2 seconds, the BCM and IPC set DTC U0121:00.

If the IPC does not receive the vehicle speed message or if the data is deemed invalid for more than 2 seconds, the IPC defaults the speedometer to 0 km/h (0 mph).

Possible Sources 

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