Diagnostic Fault Information
Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Circuit/System Description
Remote vehicle start (RVS) begins as an RF message received by the remote control door lock receiver (RCDLR) from a keyless entry transmitter. The RVS request is sent by the RCDLR to the body control module (BCM) via serial data. The BCM monitors system
conditions such as content theft deterrent (CTD), hood ajar status, and body DTCs to determine if an RVS even will occur. If conditions are determined to be acceptable, the RVS message is sent to the powertrain control module (PCM). The PCM monitors system conditions
such as engine control parameters and vehicle theft deterrent (VTD) to determine if engine starting will be allowed. If conditions are acceptable, the PCM will initiate engine starting. During the engine run time in a RVS attempt, before the operator enters
the vehicle, the PCM may discontinue engine operation if system conditions require it or a message is received from the BCM requesting the engine be turned OFF.
Diagnostic Aids
The RVS system will not operate if any of the following conditions are present:
| • | 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 hood is ajar. |
| • | A current hood ajar DTC is set. |
| • | The CTD system detects an alarm trigger. |
| • | Excessive coolant temperature |
| • | Accelerator pedal position greater than 0 percent |
| • | Vehicle theft deterrent malfunction |
| • | A current automatic transmission shift lock control system DRC is set. |
| • | A vehicle speed sensor signal is detected by the PCM. |
| • | A current vehicle DTC that illuminates the malfunction indicator lamp (MIL) |
Reference Information
Schematic Reference
Remote Function Schematics
Description and Operation
Keyless Entry System Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
- Verify that RVS is enabled in the vehicle driver information center (DIC).
| ⇒ | If RVS is not enabled, use the DIC to turn on RVS functionality. |
- Verify that the keyless entry functions operate with all available keyless entry transmitters.
- With a scan tool, verify that no RVS Disable History is present.
| ⇒ | If RVS disable history is present, refer to the applicable subsection in which the failure occurred. |
- With a scan tool, verify that there are no Current CTD Triggers present.
