Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: 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, main body ECU (multiplex network body 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

  • An incompatible hybrid vehicle control ECU is detected
  • An incompatible main body ECU (multiplex network body ECU) is detected
  • An incompatible skid control ECU (brake booster with master cylinder assembly) is detected
  • Incorrect hybrid vehicle control ECU
  • Incorrect main body ECU (multiplex network body ECU)
  • Incorrect skid control ECU (brake booster with master cylinder assembly)
  • Rack and pinion power steering gear assembly

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.

Click here

PROCEDURE

1.

CHECK RELATED PART

(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 3

A

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

  • Main body ECU (Multiplex network body ECU)

    Click here

  • Skid control ECU (Brake booster with master cylinder assembly)

    Click here

NEXT

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

    PIG Power Supply Voltage (C1552,C1554)

    Assist Map Number Un-Writing (C1581)

    See More:

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    DESCRIPTION The main body ECU (multiplex network body ECU) and windshield wiper motor assembly communicate via LIN communication. The main body ECU (multiplex network body ECU) stores this DTC if communication becomes abnormal. DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC O ...

    Toyota Avalon (XX50) 2019-2022 Owners Manual

    Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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