POWER ASSIST SYSTEMS: POWER STEERING SYSTEM(for HV Model): C1567; Error in Matching of ECUs; 2019 - 2022 MY Avalon HV [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001B6N5
Model Year Start: 2019	Model: Avalon HV	Prod Date Range: [04/2018 - ]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM(for HV Model): C1567; Error in Matching of ECUs; 2019 - 2022 MY Avalon HV [04/2018 - ]

DTC

C1567

Error in Matching of ECUs

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

GO TO STEP 3

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

GO TO DIAGNOSTIC PROCEDURE INDICATED BY OUTPUT DTC

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

4.	CHECK FOR DTC

(a) Check for DTCs.

Chassis > EMPS > Trouble Codes

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

END

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY