MDPS System A/S Work-Flow

Fig 1: Motor Driven Power Steering System A/S Work-Flow Chart

Courtesy of KIA MOTORS AMERICA, INC.

(1) Checking Connectors And Wiring

Checking Connectors and Wiring.
Check for damage, push-back, or improper connection in each connector and wiring.
1. Check the wiring on the vehicle side.
  - Check for open/short - circuit due to faulty connection, damage, or foreign substance.
  Fig 2: Battery And Vehicle Signal Connector Terminals & Connector End View
  Courtesy of KIA MOTORS AMERICA, INC.
2. Check the wiring on the ECU side (motor 3 - phase power).
  - Check for open/short - circuit due to faulty connection, damage, or foreign substance.
  Fig 3: Checking Wiring On ECU Side (Motor 3 - Phase Power)
  Courtesy of KIA MOTORS AMERICA, INC.
3. Check the motor connector.
  - Terminal Expansion and damage.
  Fig 4: Checking Motor Connector
  Courtesy of KIA MOTORS AMERICA, INC.
  NOTE:
  - Must be replaced the MDPS motor if occur terminal expansion and damage.
4. Check the motor wiring.
  
  Fig 5: Checking Motor Wiring
  Courtesy of KIA MOTORS AMERICA, INC.
  NOTE:
  - Must be replaced the MDPS motor if occur damage or problem.

(2) Inspection Parts Per DTC

Item	DTC	Description	Inspection	Service action
CAN Line	C1611	CAN TIME OUT EMS	Check the GDS Check connector tightening. Inspection the ECU CAN connector Check MDPS vehicle grounding status	EMS CAN line inspection
	C1616	CAN BUS OFF		Check the chassis can line
	C1622	Vehicle speed signal error		EMS (Engine ECU) inspection
Torque sensor	C1290	Torque sensor signal error	Inspection after DTC clear. Check connector tightening.	Replace column & housing if phenomenon persists
Torque sensor	C1112	Torque sensor supply voltage error	Check torque sensor and ECU connection connector.	Replace ECU if phenomenon persists
ECU	C1604	ECU hardware error	Inspection the ECU connector after Clear DTC	Replace ECU if phenomenon persists
ECU	C1705	EPS Module pre-charge circuit malfunction	Inspection the ECU connector after Clear DTC.	Replace ECU if phenomenon persists
Motor	C2400	Motor signal error	Inspection the Motor connector after Clear DTC.	Replace Motor if phenomenon persists
Motor	C2401	Motor position sensor error	Inspection the Motor connector after Clear DTC.	Replace Motor if phenomenon persists
ECU/Motor	C2412	Motor current error	Inspection the Motor/ECU connector after Clear DTC.	First ECU replacement Replace Motor if phenomenon persists
Steering angle sensor	C1259	Steering Angle sensor error	Steering angle reset after DTC clear Check connector tightening.	Replace column & housing if phenomenon persists
Battery	C1102	Battery voltage low	Check battery voltage status	Battery voltage charging
Cooperative control	C1696	SPAS signal error	SPAS Inspection	Clear DTC.
Cooperative control	C1697	SPAS signal error	SPAS Inspection	Clear DTC.
Cooperative control	C1612	TCU signal error	TCU Inspection	Clear DTC.
Cooperative control	C1646	TCU signal error	TCU Inspection	Clear DTC.
Cooperative control	C1628	Cluster signal error	Cluster Inspection	Clear DTC.
Cooperative control	C1656	Cluster signal error	Cluster Inspection	Clear DTC.
Cooperative control	C1692	VSM signal error	VSM Inspection	Clear DTC.
Cooperative control	C1693	VSM signal error	VSM Inspection	Clear DTC.
ABS	C1260	Steering angle signal error	Checking after steering angle reset If the C1259 code does not occur, check the CAN line.	Steering angle reset Clear DTC.