POWER ASSIST SYSTEMS POWER STEERING SYSTEM C1581 Assist Map Number Un-Writing
DESCRIPTION
This DTC will be stored if the power steering ECU assembly determines that the assist map is not written in the ECU.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| C1581 | Assist Map Number Un-Writing | Assist map not written in power steering ECU assembly | ·
CAN communication system ·
ECM ·
Skid control ECU (Brake actuator assembly) (w/ ABS) ·
Power steering ECU assembly |
EPS warning light: Comes on | Assist map written | - |
CAUTION / NOTICE / HINT
- NOTICE:
-
If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
-
Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>CALIBRATION
- HINT:
-
Related parts store information necessary for assist map writing.
-
Related Part:
- ·
ECM
·Skid control ECU (Brake actuator assembly) (w/ ABS)
PROCEDURE
Perform assist map writing.
Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>CALIBRATION
- Chassis > EMPS > Utility
-
Tester Display Signal Check - 50005 142 3
Check for DTCs.
Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DTC CHECK / CLEAR
- Chassis > EMPS > Trouble Codes
- 50001 142
- Result:
Result Proceed to DTC C1581 is output. A DTC C1581 is not output. B
- NOTICE:
-
DTC C1581 is cleared after the assist map is written.
A
B
Check for DTCs.
Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>DIAGNOSIS SYSTEM
- Result:
Result Proceed to CAN communication system DTCs are not output. A CAN communication system DTCs are output. B
A
B
Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING
Confirm if the related parts have the correct part number.
| Related Part | ECM |
| Skid control ECU (Brake actuator assembly) (w/ ABS) |
- NOTICE:
-
When removing the related part to check it, be sure to follow the appropriate procedures and precautions.
- ·
ECM
for 1ZR-FE: Click hereEngine / Hybrid System>1ZR-FE ENGINE CONTROL>ECM>REMOVAL
for 2ZR-FE: Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL
for 2NZ-FE: Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>ECM>REMOVAL
·Skid control ECU (Brake actuator assembly) (w/ ABS)
Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR>REMOVAL
- Result:
Result Proceed to All of the related parts have the correct part number. A Any of the related parts have the incorrect part number. B
A
B
Select Health Check on the GTS screen and check if system DTCs of the related parts are output.
- HINT:
-
If system DTCs of the related parts are stored, assist map writing to the power steering ECU assembly may not be performed properly.
- Result:
Result Proceed to System DTCs of the related parts are output. A System DTCs of the related parts are not output. B
A
B
Replace the related parts with ones that have the correct part number.
ECM
for 1ZR-FE: Click hereEngine / Hybrid System>1ZR-FE ENGINE CONTROL>ECM>REMOVAL
for 2ZR-FE: Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL
for 2NZ-FE: Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>ECM>REMOVAL
Skid control ECU (Brake actuator assembly) (w/ ABS)
Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>BRAKE ACTUATOR>REMOVAL
- Result:
Proceed to NEXT
NEXT
Check for DTCs.
Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>DTC CHECK / CLEAR
- Chassis > EMPS > Trouble Codes
- 50001 142
- Result:
Result Proceed to DTCs are not output. A DTCs are output. B
A
B