Test G: DTC U0100 - Lost Communication With ECM/PCM, DTC U2511 - CAN - Data Mis-Match (Receive Data Does Not Match Expected)
PINPOINT TEST G: DTC U0100 - LOST COMMUNICATION WITH ECM/PCM, DTC U2511 - CAN - DATA MIS-MATCH (RECEIVE DATA DOES NOT MATCH EXPECTED)Normal Operation
The passive anti-theft system (PATS) uses a visual anti-theft indicator located in the IC. This indicator proves out for 3 seconds when the key is turned to the ON or START position under normal operation. If there is a PATS concern, this indicator either flashes rapidly or glows steadily (for more than 3 seconds) when the key is turned to the ON or the START position. PATS also flashes the anti-theft indicator every 2 seconds at key off to act as a visual theft deterrent. The anti-theft indicator operation is controlled by the IC.
If DTC U2510 is present, refer to DTC Charts.
- DTC U0100 (Lost Communication With ECM/PCM) - sets in continuous memory only when the instrument cluster (IC) loses communication with the PCM and the fault may not be present at the time of testing. This DTC may be caused by a high speed controller area (HS-CAN) network circuit issue or by the IC or the PCM.
- DTC U2511 (CAN - Data Mis-Match [Receive Data Does Not Match Expected]) - sets in continuous memory only when the IC does not receive the expected response from the PCM over the HS-CAN network and the fault may not be present at the time of testing. The data sent by the PCM does not match the data expected by the IC and this DTC is set. This DTC can be caused by the HS-CAN circuits between the IC and the PCM or by either module. This DTC can also be set if the battery voltage is low.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Low battery state of charge (SOC)
- IC
- PCM
