Pinpoint Test CE : U0293:00, U0293:82 Or U0594:86

Normal Operation and Fault Conditions

REFER to: Communications Network - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
IPC U0293:00	Lost Communication with Hybrid/EV Powertrain Control Module: No Sub Type Information	Sets in continuous memory in the IPC if data messages received from the PCM through the GWM are missing for 5 seconds or longer.
IPC U0293:82	Lost Communication with Hybrid/EV Powertrain Control Module: Alive/Sequence Counter Incorrect/Not Updated	Sets in the IPC if the IPC does not receive charge port door ajar message data from the PCM for 5 seconds or longer (PHEV only).
IPC U0594:86	Invalid Data Received From Hybrid/EV Powertrain Control Module: Signal Invalid	Sets in the IPC if the IPC receives invalid brake coach data from the PCM for 5 seconds or longer (PHEV only).

Possible Sources

Communication concern
Battery voltage concern
GWM
PCM
IPC

CE1 VERIFY THE CUSTOMER CONCERN

Ignition ON.

Verify there is an observable symptom present.

Is an observable symptom present?

Yes

GO to CE2

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

CE2 CHECK THE IPC (INSTRUMENT PANEL CLUSTER) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

Using a diagnostic scan tool, perform the IPC self-test.

Clear the Diagnostic Trouble Codes (DTCs).

Wait 10 seconds.

Repeat the IPC self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes	DIAGNOSE all non-network Diagnostic Trouble Codes (DTCs). REFER to DTC Chart: IPC in this information. Refer to Diagnostic Trouble Code (DTC) Chart

GO to CE3

CE3 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, perform the PCM self-test.
Are any non-network Diagnostic Trouble Codes (DTCs) present?

Yes REFER to: Electronic Engine Controls .

No GO to CE4

CE4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CM DTCs).
Are any Diagnostic Trouble Codes (DTCs) set?

Yes REFER to: Communications Network .

No GO to CE5

CE5 RECHECK THE IPC (INSTRUMENT PANEL CLUSTER) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, clear the IPC Diagnostic Trouble Codes (DTCs).

Ignition OFF.

Ignition ON.

Wait 10 seconds.

Using a diagnostic scan tool, perform the continuous memory self-test.

Check the IPC Diagnostic Trouble Codes (DTCs).

Is DTC U0293:00, U0293:82 or U0594:86 still present?

Yes

GO to CE6

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

CE6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

NOTE: If new modules were installed prior to the DTC being set, the module configuration can be incorrectly set during the PMI or the PMI may not have been carried out.

CHECK the vehicle service history for recent service actions related to the PCM, GWM or IPC. If recent service history is found:
- verify correct replacement module was installed
  - vehicle parts build may be used to verify correct part fitment
- verify the configuration of replacement module was correct
  - re-configure module using as-built data if prior configuration is suspect
- verify the module was not obtained from a like vehicle and installed into customer vehicle
  - return the swapped module to source vehicle and obtain new replacement module

Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?

Yes

GO to CE7

No	The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

CE7 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the PCM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the PCM connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new PCM. REFER to POWERTRAIN CONTROL MODULE (PCM)

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.