Pinpoint Test G: DTC U0100 Or DTC U2511
Anti-Theft
Pinpoint Test G: DTC U0100 Or DTC U2511
Refer to Wiring Diagrams Set 14, Module Communications Network for schematic and connector information. Electrical Diagrams
Normal Operation
During each vehicle start sequence, when the key is turned to the START or ON position, the Passive Anti-Theft System (PATS) transceiver reads the PATS (Passive Anti-Theft System) key identification code and sends the data to the Instrument Cluster (IC).
If DTC U2510 is present, refer to DTC Charts. Antitheft and Alarm Systems
- DTC U0100 (Lost Communication With ECM (Engine Control Module) /PCM)- a continuous DTC that sets only when the IC (Instrument Cluster) loses communication with the PCM and the fault may not be present at the time of testing. The DTC may be caused by a High Speed Controller Area Network (HS-CAN) 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])- a continuous DTC that sets 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 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
- IC (Instrument Cluster)
- PCM
PINPOINT TEST G : DTC U0100 OR DTC U2511
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.
- Carry out the network test using the scan tool.
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 in the connections (connectors) and the splices in the joint connectors 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
NOTE: When a new PCM is installed, the PATS (Passive Anti-Theft System) keys do not need to be programmed into the IC (Instrument Cluster).
NOTE: When a new PCM is installed, the parameters must be reset in the IC (Instrument Cluster) and the PCM.
- 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
NOTE: When a new IC (Instrument Cluster) is installed, the PATS (Passive Anti-Theft System) keys must be programmed into the new IC (Instrument Cluster).
NOTE: When a new IC (Instrument Cluster) is installed, the parameters must be reset in the IC (Instrument Cluster) and the PCM.
- Disconnect the IC (Instrument Cluster) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IC (Instrument Cluster) connector and make sure it seats 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 Integrated Keyhead Transmitter (IKT) 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 (Diagnostic Trouble Codes). CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.