U0100:00 Lost Communication with ECM/PCM "A": No Sub Type Information | A continuous memory DTC that sets in in the SODL and SODR when messages received from the PCM over the HS-CAN1 through the GWM are missing for 2 seconds or more. |
Possible Sources
Communication network concern PCM GWM concern
PINPOINT TEST G : DTC (DIAGNOSTIC TROUBLE CODE) U0100:00
G1 VERIFY THE CUSTOMER'S CONCERN
Ignition ON. Verify if there is an observable symptom present.
Is an observable symptom present?
Yes | GO to G2 |
|---|---|
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. CLEAR the DTC. |
G2 VERIFY THAT THE DIAGNOSTIC SCAN TOOL CAN COMMUNICATE WITH THE PCM (POWERTRAIN CONTROL MODULE)
Connect a diagnostic scan tool. Check that a vehicle session can be established using the diagnostic scan tool.
Can a vehicle session be established?
Yes | GO to G3 |
|---|---|
No | REFER to: Communications Network (418-00 Module Communications Network) . |
G3 CHECK THE SODL (SIDE OBSTACLE DETECTION CONTROL MODULE LH) AND SODR (SIDE OBSTACLE DETECTION CONTROL MODULE RH) DIAGNOSTIC TROUBLE CODES (DTCS)
Using a diagnostic scan tool, clear the SODL and SODR Diagnostic Trouble Codes (DTCs). Ignition OFF. Ignition ON. Wait 10 seconds. Check the SODL and SODR Diagnostic Trouble Codes (DTCs).
Is DTC U0100:00 retrieved again?
Yes | GO to G4 |
|---|---|
No | The system is operating correctly at this time. The DTC may have set due to high network traffic or an intermittent fault condition. |
G4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST
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