Pinpoint Test L: The Vehicle Does Not Start/Unable To Transition The Ignition Out Of OFF

Anti-Theft - With Intelligent Access (IA)

Pinpoint Test L: The Vehicle Does Not Start/Unable To Transition The Ignition Out Of OFF

Normal Operation

During each vehicle start sequence, when the START/STOP switch is pressed, the Remote Function Actuator (RFA) activates all 3 passive start antennas, which send out a low frequency signal. If an Intelligent Access (IA) key is within range of a passive start antenna, the low frequency signal activates the IA key. When the IA key is activated it sends a high frequency signal to the Remote Functions Receiver (RFR) module. The RFR module communicates with the RFA module. If the RFA module determines that a programmed IA key is in the vehicle, it allows the ignition to transition out of off or let the engine start.

The vehicle experiences a PATS no-start in the event there is a failure of any passive start antenna, the battery in the IA key, or the RFR module. However, in the event of one of these failures, the IA key can be placed next to the PATS transceiver (located in the steering column) to allow the vehicle to start. The PATS transceiver activates an IA key if it is placed in close proximity. The PATS transceiver is hardwired to the RFA module.

Once the RFA module determines that a programmed IA key is inside the vehicle and receives a request to start the engine, it communicates with the PCM over the High Speed Controller Area Network (HS-CAN). Once the RFA module and the PCM communicate, the RFA module checks the ID of the PCM and compares it with the module ID stored in its own memory. If the RFA module and PCM IDs match then the PATS enables the starter relay and fuel injectors and allows the engine to start.

The IA key disable feature prevents the engine from starting or the ignition from transitioning out of off if the IA key has been disabled. For more information on the IA key disable feature, refer to Anti-Theft - Perimeter Testing and Inspection.

This pinpoint test is intended to diagnose the following:

- Starting system concern
- Driveability concern
- PATS concern

PINPOINT TEST L: THE VEHICLE DOES NOT START/UNABLE TO TRANSITION THE IGNITION OUT OF OFF

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L1 CHECK FOR KEY NOT DETECTED

NOTE: Prior to performing any diagnostics press the unlock button on an IA key to make sure the IA key disable feature was causing the concern.

- Check the Front Control/Display Interface Module (FCDIM) while pressing the START/STOP switch.
- Is KEY NOT DETECTED displayed?

Yes
GO to Pinpoint Test M. Pinpoint Test M: KEY NOT DETECTED Is Displayed

No
GO to L2.

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L2 CHECK THE IPC OPERATION

- Observe the Instrument Panel Cluster (IPC) operation while pressing the START/STOP switch.
- Do some of the indicators in the IPC illuminate?

Yes
GO to L3.

No
GO to L4.

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L3 CHECK FOR RFA MODULE DTCs

- Retrieve the RFA module continuous DTCs.
- Are any RFA module DTCs present?

Yes
REFER to DTC Charts. Anti-Theft - With Intelligent Access (IA)

No
The no-start condition is not PATS-related. REFER to Starting System Testing and Inspection to diagnose the cause of the no-start condition.

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L4 CHECK FOR COMMUNICATION WITH THE SCAN TOOL

- Refer to Inspection and Verification in Module Communications Network Testing and Inspection, and follow the procedure to establish a session with the vehicle.
- Does the scan tool establish communication with the vehicle?

Yes
REFER to Steering Column Switches Testing and Inspection to diagnose no power in RUN.

No
REFER to Module Communications Network Testing and Inspection to diagnose no communication with the RFA module or the PCM.

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