Lexus ES manuals

Lexus ES: Cruise Control System Internal Failure (P057504,P057549)

DESCRIPTION

When the hybrid vehicle control ECU detects an internal malfunction, DTC P057504 or P057549 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

P057504

Cruise Control System Internal Failure

When the dynamic radar cruise control system is operating, the hybrid vehicle control ECU detects a malfunction in the internal cancel circuit for 0.4 seconds or more.

Hybrid vehicle control ECU

Does not come on

Hybrid Control

P057549

Cruise Control Internal Electronic Failure

When the dynamic radar cruise control system is operating, the hybrid vehicle control ECU detects a malfunction in the internal STP signal circuit for 0.2 seconds or more.

Hybrid vehicle control ECU

Does not come on

Hybrid Control

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the hybrid vehicle control ECU, refer to Registration.

Click here

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > Clear DTCs

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

(c) Check for DTCs.

Powertrain > Radar Cruise1 > Trouble Codes

Result

Proceed to

DTC P057504 and P057549 are not output.

A

DTC P057504 or P057549 is output.

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE HYBRID VEHICLE CONTROL ECU

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