Pinpoint Test AM: DTC U0100:00 and P1607:87

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AM: DTC U0100:00 and P1607:87

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 more. For a complete list of all network messages, refer to Information Bus.

- DTC P1607:87 (MIL (Malfunction Indicator Lamp) Output Circuit: Missing Message)- sets in continuous memory in the IPC (Instrument Panel Cluster) when the MIL (Malfunction Indicator Lamp) message from the PCM is missing for 5 seconds or more.

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 AM : DTC U0100:00 AND P1607:87

AM1 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 AM2.

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

AM2 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 or DTC P1607:87 retrieved again?

Yes
GO to AM3.

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.

AM3 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 AM4.

AM4 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 U3006:16 or DTC U3006:17 recorded?

Yes
For DTC U3006:16, GO to Pinpoint Test AU Pinpoint Test AU: DTC U3006:16.

For DTC U3006:17, GO to Pinpoint Test AV Pinpoint Test AV: DTC U3006:17.

No
GO to AM5.

AM5 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 U0100:00 set in the Remote Function Actuator (RFA) module or the Restraints Control Module (RCM)?

Yes
INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test.

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