U2511
Anti-Theft
Pinpoint Test G: DTC U0100, DTC U2511
Refer to Wiring Diagrams Set 14, Module Communications Network for schematic and connector information. Electrical Diagrams
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 (Passive Anti-Theft System) concern, this indicator either flashes rapidly or glows steadily (for more than 3 seconds) when the key is turned to the ON or START position. PATS (Passive Anti-Theft System) 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 (Instrument Cluster). If there is a High Speed Controller Area Network (HS-CAN) concern, the anti-theft indicator in the IC (Instrument Cluster) flashes and the vehicle experiences a PATS (Passive Anti-Theft System) no-start.
NOTE: If DTC U2510 is present with any combination of the DTCs below, refer to DTC Charts and carry out the action for DTC U2510. Antitheft and Alarm Systems
- DTC U0100 (Lost Communication With ECM (Engine Control Module) /PCM)- sets in continuous memory only when the IC (Instrument Cluster) loses communication with the PCM and the fault may not be present at the time of testing. This DTC may be caused by a HS-CAN (High Speed Controller Area Network) circuit concern or by the IC (Instrument Cluster) or the PCM.
- DTC U2511 (CAN (Controller Area Network) - Data Mis-Match (Receive Data Does Not Match Expected))- sets in continuous memory only when the IC (Instrument Cluster) does not receive the expected response from the PCM over the HS-CAN (High Speed Controller Area 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 (Instrument Cluster) and this DTC is set. This DTC can be caused by the HS-CAN (High Speed Controller Area Network) circuits between the IC (Instrument Cluster) and the PCM or by either module. This DTC can also 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
- IC (Instrument Cluster)
- PCM
PINPOINT TEST G : DTC U0100, DTC U2511
NOTE: When a new IC (Instrument Cluster) is installed, the parameters must be reset in the IC (Instrument Cluster) and the PCM and the PATS (Passive Anti-Theft System) keys must also be programmed into the new IC (Instrument Cluster).
G1 CHECK THE BATTERY STATE OF CHARGE
- Ignition OFF.
- Check the battery state of charge with the battery condition test.
Does the battery pass the battery condition test?
Yes
GO to G2.
No
REFER to Charging System to diagnose the low battery voltage condition.
G2 CHECK FOR MODULE COMMUNICATION ON THE HS-CAN (High Speed Controller Area Network)
- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
Is the scan tool unable to communicate with any of the modules on the HS-CAN (High Speed Controller Area Network)?
Yes
REFER to Information Bus to diagnose the module that is not communicating with the scan tool.
No
GO to G3.
G3 INSPECT THE HS-CAN (High Speed Controller Area Network) CIRCUITRY
- Ignition OFF.
- Inspect all of the HS-CAN (High Speed Controller Area Network) circuitry, including the pin crimps, connector fit, corroded/bent/pushed-out/damaged pins and splice integrity between the PCM and the IC (Instrument Cluster).
Does the HS-CAN (High Speed Controller Area Network) circuitry pass the component inspection?
Yes
GO to G4.
No
REPAIR the HS-CAN (High Speed Controller Area Network) circuitry as necessary. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
G4 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new PCM. RESET the parameters in both the IC (Instrument Cluster) and the PCM. REFER to Passive Anti-Theft System (PATS) Parameter Reset . CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation. If the concern is still present, GO to G5.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
G5 CHECK FOR CORRECT IC (Instrument Cluster) OPERATION
- Disconnect all the IC (Instrument Cluster) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the IC (Instrument Cluster) connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new IC (Instrument Cluster). RESET the parameters in both the IC (Instrument Cluster) and the PCM. REFER to Passive Anti-Theft System (PATS) Parameter Reset . PROGRAM the PATS (Passive Anti-Theft System) keys into the new IC (Instrument Cluster). REFER to Spare Key Programming - Using Diagnostic Equipment . CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.