Test G: DTC U2511 - CAN - Data Mis-Match (Receive Data Does Not Match Expected)
PINPOINT TEST G: 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 instrument cluster (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.
DTC U2511 sets when the IC does not receive the expected response from the PCM over the HS-CAN network. 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.
- DTC U0100 (Lost Communication With ECM/PCM) - sets when the IC loses communication with the PCM.
- DTC U2510 (CAN - Invalid Data for Vehicle Security) - sets when the IC receives an invalid PCM ID over the HS-CAN network. The IC ID and the PCM ID do not match and this DTC is set. This DTC can be set if either the IC or the PCM is replaced without resetting the parameters in both modules, or if there is an issue with either the IC or the PCM. This DTC can also be set if the battery voltage is low.
This pinpoint test is intended to diagnose the following:
- Low battery state of charge (SOC)
- Mis-matched parameters
- IC
- PCM
