Instrument Panel, Gauges and Warning Indicators

Instrumentation, Message Center and Warning Chimes

Pinpoint Test BA: DTC U0100:00

Normal Operation

- DTC U0100:00 (Lost Communication With ECM (Engine Control Module) /PCM "A": No Sub-Type Information)- sets in continuous memory in the Instrument Panel Cluster (IPC) if data messages received from the PCM over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or longer. For a complete list of all network messages, refer to Information Bus.

NOTE: Once the IPC (Instrument Panel Cluster) sets DTC U0100:00, multiple gauges or indicators are likely to be inoperative in the IPC (Instrument Panel Cluster). Other modules that require data from the IPC (Instrument Panel Cluster) all set communication DTCs and may also exhibit system function concerns.

This pinpoint test is intended to diagnose the following:

- PCM

- IPC (Instrument Panel Cluster)

PINPOINT TEST BA : DTC U0100:00

BA1 VERIFY THE SCAN TOOL CAN COMMUNICATE WITH THE PCM

- Connect the scan tool.

- Check that a vehicle session can be established using the scan tool.

Can a vehicle session be established?

Yes
GO to BA2.

No
To diagnose no communication with the PCM, REFER to Information Bus.

BA2 CHECK THE IPC (Instrument Panel Cluster) CONTINUOUS MEMORY DTCs

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) Self-Test.

- Clear the DTCs.

- Wait 10 seconds.

- Repeat the IPC (Instrument Panel Cluster) self-test.

Is DTC U0100:00 retrieved again?

Yes
GO to BA3.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

BA3 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO (Key ON Engine OFF) SELF-TEST

- Check for recorded DTCs from the PCM Key ON Engine OFF (KOEO) self-test.

Is DTC P0562 or P0563 recorded?

Yes
REFER to Computers and Control Systems.

No
GO to BA4.

BA4 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded DTCs from the IPC (Instrument Panel Cluster) self-test.

Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
For DTC U3003:16, GO to Pinpoint Test BK. Pinpoint Test BK: DTC U3003:16

For DTC U3003:17, GO to Pinpoint Test BL. Pinpoint Test BL: DTC U3003:17
No
GO to BA5.

BA5 CHECK FOR DTC U0100:00 SET IN OTHER MODULES

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Self-Test.

- Retrieve the continuous memory DTCs from all modules.

Is DTC U0100:87 set in the Remote Function Actuator (RFA) module (if equipped) or DTC U0100:00 in the Restraints Control Module (RCM)?

Yes
INSTALL a new PCM. TEST the system for normal operation.

No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.