Engine Cranking Diagnostic Mode

WARNING: This page is about a different variant/trim than selected.

NOTE: Access the traction battery control module (TBCM) and monitor the traction battery SOC PID. If the monitored PID displays the SOC below 45%, start and idle the engine with full A/C ON. When the traction battery SOC exceeds 45%, the engine cranking diagnostic mode can be activated.

The engine cranking diagnostic mode is a powertrain control module (PCM) strategy which is separate from the normal operating strategy. It allows the engine to crank in a similar fashion as a conventional vehicle with the fuel disabled. When in this mode, the PCM commands the transaxle control module (TCM) to spin the generator which cranks the engine with the speed between 900 and 1,200 RPM. To activate the engine cranking diagnostic mode the gear selector must be in the PARK position, the traction battery state of charge (SOC) must be greater than 45%, and the ignition key must be cycled to the START position. The engine will crank as long as the traction battery SOC stays greater than 35%. The hazard indicator flashing once per second indicates that the vehicle is in the engine cranking diagnostic mode. This mode is helpful whenever the engine must be cranked but not started. Carry out the following sequence to activate this mode:

Apply the parking brake.
Place the gear selector in the PARK position.
Key in the OFF position.
CAUTION: Do not start the engine.
Key in the ON position with the engine OFF.
Within 5 seconds of the key in the ON position, fully apply the accelerator pedal and hold for 10 seconds.
Within 5 seconds release the accelerator pedal, shift the gear selector to the NEUTRAL position and fully apply the accelerator pedal.
Hold the accelerator pedal fully applied for 10 seconds.
Release the accelerator pedal and shift the gear selector to the PARK position.

If the sequence is properly executed the instrument cluster hazard indicator (red triangle) flashes once per second when the gear selector is shifted to the PARK position. The engine may be cranked by cycling the ignition key to the START position. If the ignition key stays in the START position for 15 seconds or longer, the PCM may set the diagnostic trouble code (DTC) P2535. The PCM exits the engine cranking diagnostic mode when the traction battery SOC drops below 35%, the gear selector is shifted to any gear other than PARK, or when the ignition key is turned to the OFF or ACC position.