DESCRIPTION This DTC will
be stored if the power steering ECU (rack and pinion power steering gear
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 (rack and pinion power steering gear assembly) |
- CAN communication system
- Hybrid vehicle control ECU
- Main body ECU (Multiplex network body ECU)
- Skid control ECU (Brake booster with master cylinder assembly)
- Rack and pinion power steering gear assembly
| EPS warning light: Comes on |
Assist Map Writing is performed or the power switch is turned on (IG) again |
- | CAUTION / NOTICE / HINT
NOTICE: If
the rack and pinion power steering gear assembly has been replaced,
perform assist map writing and torque sensor zero point calibration. Click here
 HINT: Related parts store information necessary for assist map writing.
Related Part:
- Hybrid vehicle control ECU
- Main body ECU (Multiplex network body ECU)
- Skid control ECU (Brake booster with master cylinder assembly)
PROCEDURE |
1. | PERFORM ASSIST MAP WRITING |
(a) Perform assist map writing. Chassis > EMPS > Utility
|
Tester Display | | Signal Check |
(b) Check for DTCs. Chassis > EMPS > Trouble Codes
|
Result | Proceed to | |
DTC C1581 is output. |
A | | DTC C1581 is not output. |
B |
| B |
 | END |
|
A |
 | |
| 2. |
CHECK CAN COMMUNICATION SYSTEM | (a) Check for DTCs.
Click here
|
Result | Proceed to | |
CAN communication system DTCs are not output. |
A | | CAN communication system DTCs are output. |
B |
| B |
| GO TO CAN COMMUNICATION SYSTEM |
|
A | |
| |
(a) Confirm if the related part has the correct part number. |
Related Part | Hybrid vehicle control ECU | |
Main body ECU (Multiplex network body ECU) | |
Skid control ECU (Brake booster with master cylinder assembly) |
NOTICE: When removing the related part to check it, be sure to follow the appropriate procedures and precautions.
- Hybrid vehicle control ECU
Click here
- Main body ECU (Multiplex network body ECU)
Click here
- Skid control ECU (Brake booster with master cylinder assembly)
Click here
|
Result | Proceed to | |
The related part has the correct part number. |
A | | The related part has an incorrect part number. |
B |
| B |
| GO TO STEP 5 |
|
A | |
| |
(a) Select Health Check on the Techstream screen and check if system DTCs of the related part are output.
HINT: If
system DTCs of the related part are stored, assist map writing to the
power steering ECU (rack and pinion power steering gear assembly) may
not be performed properly. |
Result | Proceed to | |
System DTCs of the related part are output. |
A | | System DTCs of the related part are not output. |
B |
| A |
| GO TO DIAGNOSTIC PROCEDURE INDICATED BY OUTPUT DTC |
| B |
| REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY |
| 5. |
REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER |
(a) Replace the related part with one that has the correct part number.
- Hybrid vehicle control ECU
Click here
- Main body ECU (Multiplex network body ECU)
Click here
- Skid control ECU (Brake booster with master cylinder assembly)
Click here
|
NEXT | |
| |
(a) Check for DTCs. Chassis > EMPS > Trouble Codes
|
Result | Proceed to | |
DTCs are not output. |
A | | DTCs are output. |
B |
| A |
| END |
| B |
| REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY | | 
