Lexus ES: Error in Matching of ECUs (C1567)
DESCRIPTION
The power steering ECU (rack and pinion power steering gear assembly) determines whether an incompatible hybrid vehicle control ECU or skid control ECU (brake booster with master cylinder assembly) is installed based on the identification information.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| C1567 | Error in Matching of ECUs |
|
| EPS warning light: Comes on | The ECU judges the system has returned to normal 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.
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PROCEDURE
| 1. | CHECK RELATED PART |
(a) Confirm if the related part has the correct part number.
| Related Part | Hybrid vehicle control 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
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-
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 | .gif) | GO TO STEP 3 |
|
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| 2. | CHECK FOR DTC |
(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 |
| 3. | 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
-
Skid control ECU (Brake booster with master cylinder assembly)
Click here
|
| 4. | CHECK FOR DTC |
(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 |
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Assist Map Number Un-Writing (C1581)
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
Assist Map Number Mismatch (C1582)
DESCRIPTION When an incorrect hybrid vehicle control ECU or skid control ECU (brake booster with master cylinder assembly) is installed after the assist map has been written to the power steering ECU
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DESCRIPTION The power steering ECU (rack and pinion power steering gear assembly) receives signals from the hybrid vehicle control ECU, steering sensor, skid control ECU (brake booster with master cyl
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