GROUP
Electrical
NUMBER
PS237

SUBJECT:

MODEL
Optima Hybrid
(TF HEV) ≥ 2011MY
DATE
February 2013

FORCE-STARTING OPTIMA HYBRID ENGINE USING GDS

If you encounter an Optima Hybrid with a no-start condition, check if the “READY” lamp is
flashing in the cluster and verify the hybrid battery State of Charge (SOC) ranges from 15% to
20%. If these conditions are present, a technician may use GDS to “force start” the engine
and resolve the concern.
Using GDS, try to start the engine using the Engine On test in the S/W Management tab
under the HCU System
If this procedure fails, start the engine by following these steps:
1. Configure GDS using the Vin Auto Detect Function.
2. Click on All System Modules.
3. Click on the Fault Code Searching button at the bottom of the screen.
4. Check for codes and record all (both active and historical) using the screen capture button
(camera icon in the upper right corner of the window).
5. Clear all codes and wait for the confirmation screen.
6. Click on the HCU System.
7. Click on Engine ON Test. If the vehicle starts, hold the brake pedal down and apply
throttle to rapidly charge the HEV battery to 50% SOC.
8. If codes P0C17 or P1C76 were present in step 4, perform the resolver calibration.
9. Click on the S/W Management tab and MCU System. Proceed to perform the drive motor
resolver and HSG resolver recalibration procedure.
10. Test drive vehicle and recheck for codes in all systems. If any are present, use DTC
troubleshooter on KGIS to diagnose any additional problems.
NOTE: If the “force start” procedure results in the engine cranking for approximately
5 seconds and then stopping, there may be an engine-side fault that must be
repaired first.
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