The majority of vehicles have a red Stop Switch on the front of the Power Electronics Carrier (PEC). If this switch is pushed in, the amber “Check Hybrid” light will blink.
- To reset, pull switch out and turn key off for 2 minutes. Continue to the diagnostic test for the fault that is currently Active.
- If the light remains on, go to “Hybrid Diagnostic Procedure” and start with step 3 “Retrieve Active Faults with ServiceRanger.”
- There should be an Active Fault Code 76 FMI 4, or Fault Code 116, FMI 10.
A “ST” in the gear display indicates a driver-triggered snapshot was recorded. Snapshot is a diagnostic tool that is used to capture specific data at the time a fault occurs. It is triggered through two different means listed below:
- Fault code triggered – Specific faults will trigger the HCM or TECU to capture a snapshot file for later retrieval. This method will not display an “ST” in the gear display.
- Driver triggered – If the driver chooses to capture a snapshot of an event, he needs to decide if he wants TECU or HCM data. To capture a TECU snapshot select, Low and the Up button twice. To capture a HCM snapshot select, Drive or Low and the Up button and the Down button.
A “PD” in the gear display indicates the TECU and HCM are in a special diagnostic mode called Product Diagnostic Mode (PDM).For more details on the mode and its operation, see “Product Diagnostic Mode (PDM)”
“CA” in gear display indicates HCM is detecting a clutch abuse situation.
- If the HCM detects a clutch abuse situation it will first tone the Push Button Shift Control and flash a “CA” in the gear display.
- If the clutch abuse situation continues, the hybrid system will allow only an electric launch in addition to continuing the tone and the “CA.”
- If the clutch abuse continues while driving, the hybrid system will open the clutch when vehicle speed is below 5mph and allow the clutch to cool.
“OS” in the gear display indicates the HCM is detecting a motor overspeed situation. The vehicle will upshift in Drive and Low automatically; however, if the vehicle is in manual mode, close to motor overspeed and the driver fails to upshift, the vehicle will:
- Display an “OS” indicating the driver needs to press the service brake pedal to slow the vehicle; or,
- The HCM will either upshift the vehicle or reduce torque to prevent the motor from going overspeed.
“F” in the gear display indicates the TECU has detected an Active fault. This fault can be accessed with ServiceRanger. See Fault Code Isolation Procedure Index.
A “-” in the gear display indicates the transmission is stuck in gear. See Symptom-Driven Diagnostics Index.
Two stars “**” in the gear display indicates the gear display has power, but no communication on the data link. See
Symptom-Driven Diagnostics Index.
Two dashes “- -” in the gear display indicates the gear display has power, and there is no communication present on the data link, or the TECU isn’t communicating with the display. See Symptom-Driven Diagnostics Index.
A blank gear display indicates the display has lost power, or the TECU isn’t communicating with the gear display. See Symptom-Driven Diagnostics Index.