Diagnostic Codes: U1016
1. Unplug the Antilock Brake System (ABS) module, air bag module and Instrument Panel Cluster (IPC) one at a time to see if communication comes back with the other modules.
2. Check for a 5 volts digital signal at the Data Link Connector (DLC) pin 9. If there is no signal at pin 9, unplug all of the module and check for a continuity between pin 9 and ground.
3. If there is continuity between pin 9 and ground check the data wire for shorts to ground.
Air Bag ModuleAntilock Brake System (ABS)Grounded Data LineInstrument Panel Cluster (IPC) U1016 Serial Communications Malfunction
Possible CausesPerform the Diagnostic System Check for Engine ControlsCheck the connector for a problem (check pins for damage, and for moisture)UART data line is openUART data line is shorted to groundUART data line is shorted to voltage
cluster works but no rpm and heat temp gauge