EPS-LKAS DTC Troubleshooting: 91-02, 92-01, 92-02

EPS Control Unit DTC 91-02: ECU Internal Circuit (Communication Error)
EPS Control Unit DTC 92-01: Motor Drive Circuit (Low FET of H-Bridge Circuit) Malfunction
EPS Control Unit DTC 92-02: Motor Drive Circuit (High FET of H-Bridge Circuit) Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the how to troubleshooting information.

DTC Description	DTC	Freeze Frame
91-02 Motor Current Detector Offset Out of Range
92-01 Motor Drive Circuit (Low FET of H-Bridge Circuit) Malfunction
92-02 Motor Drive Circuit (High FET of H-Bridge Circuit) Malfunction

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Turn the vehicle to the OFF (LOCK) mode.

?4.	Test-drive the vehicle at 45 mph (72 km/h) or more for 30 seconds or more with the LKAS activated. NOTE: Drive the vehicle on the road, not on a lift.

?5.

Check for DTCs with the HDS.

DTC Description	DTC	Freeze Frame
91-02 Motor Current Detector Offset Out of Range
92-01 Motor Drive Circuit (Low FET of H-Bridge Circuit) Malfunction
92-02 Motor Drive Circuit (High FET of H-Bridge Circuit) Malfunction

Is DTC 91-02, 92-01, or 92-02 indicated?


	YES

Check for loose terminals and poor connections in the EPS control unit connector. If they are OK, replace the EPS control unit.?


	NO

Intermittent failure, the system is OK at this time.?