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Remote Vehicle Start Malfunction

Diagnostic Instructions
    •  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    •  Review Strategy Based Diagnosis for an overview of each diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Description

Remote start begins as a radio frequency message received by the body control module (BCM) from a keyless entry transmitter. The BCM monitors system conditions such as content theft deterrent, bonnet ajar status, and body DTCs to determine if a remote start event will occur. If conditions are determined to be acceptable, the remote start message is sent to the engine control module (ECM). The ECM monitors system conditions such as engine control parameters and the immobiliser system to determine if engine starting will be allowed. If conditions are acceptable, the ECM will activate the appropriate vehicle systems.

Diagnostic Aids
    • A remote start event will not always start the vehicle engine. If the high voltage battery state of charge is sufficient to operate the vehicle systems or the vehicle is plugged in, the engine will not start.
    • If the vehicle has a current vehicle DTC that illuminates the malfunction indicator lamp, the cause of the DTC must be diagnosed before proceeding with the remote start malfunction diagnostic.

Reference Information

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification
  1. Verify that remote vehicle start is enabled through vehicle personalisation.
    2. ⇒If remote vehicle start is not enabled through vehicle personalisation
        Use vehicle personalisation to turn on remote vehicle start functionality. Refer to the vehicle owners manual.
    ⇓   If remote vehicle start is enabled
  2. Verify that the keyless entry functions operate with all available keyless entry transmitters.
    3. ⇒If the keyless entry functions do not operate properly
        Refer to Keyless Entry System Malfunction : Passive  → Active .
    ⇓   If the keyless entry functions operate properly
  3. Verify none of the following conditions exist on the vehicle:
    4. • A current vehicle DTC that illuminates the malfunction indicator lamp (MIL)
    • The vehicle is in valet mode.
    • More than 2 remote starts have been attempted.
    • The hazard switch is in the ON position.
    • A current hazard switch DTC is set.
    • The vehicle bonnet is ajar.
    • A current bonnet ajar DTC is set.
    • The content theft deterrent system detects an alarm trigger.
    • Excessive engine RPM
    • Excessive coolant temperature
    • Accelerator pedal position greater than 0 percent
    • Vehicle not in park
    • Vehicle theft deterrent malfunction
    • A current automatic transmission shift lock control system DTC is set.
    • A vehicle speed sensor signal is detected by the ECM.
    ⇒If any of the conditions are present
        Refer to the appropriate subsection in which the failure occurred.
    ⇓   If none of the conditions are present
  4. All OK.
   


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