Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: Cruise Control System Internal Failure (P057504,P057549)

DESCRIPTION

This DTC is stored when there is a malfunction in the ECM.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

P057504

Cruise Control System Internal Failure

While the dynamic radar cruise control system is operating, the dynamic radar cruise control system control of vehicle speed is not canceled and approximately 0.4 seconds have elapsed after cruise cancel signal (STP signal) is received by the ECM.

ECM

Does not come on

P057549

Cruise Control Internal Electronic Failure

While the dynamic radar cruise control system is operating, STP signals received by the ECM supervisory CPU and that received by the control ECU do not match for approximately 0.2 seconds or more.

ECM

Does not come on

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the ECM, refer to Registration.

w/o Smart Key System: Click here w/ Smart Key System: Click here

w/ Smart Key System: Click here HINT:

HINT:

The ECM receives signals from each sensor to control all functions of the cruise control system. When a malfunction is detected, the fail-safe function operates until the ignition switch is turned off.

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Click here (b) Perform the following procedure.

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Drive the vehicle at a speed for which dynamic radar cruise control operation is possible.
  2. Turn the dynamic radar cruise control system on using the cruise control main switch.
  3. Depress the brake pedal for 1 second or more.

(c) Check for DTCs.

Click here OK:

OK:

DTC P057504 and P057549 are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE ECM

Brake Switch "A" Signal Compare Failure (P057162)
DESCRIPTION When the brake pedal is depressed, the stop light switch assembly sends a signal to the ECM. When the ECM receives this signal, it cancels the dynamic radar cruise control. The fail-s ...

Skid Control Buzzer Circuit (C1A4A)
DESCRIPTION Based on dynamic radar cruise control system operation, the forward recognition camera provides warnings to the driver by sounding the skid control buzzer. DTC C1A4A is stored when a m ...

Other materials:

Check Mode Procedure
CHECK MODE PROCEDURE 1. DESCRIPTION (a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1 trip detection logic. ...

Runnable Signal Malfunction (B2286,P0335)
DESCRIPTION These DTCs are stored when the engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match. HINT: When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the s ...

Driver Side Power Window Auto Up / Down Function does not Operate with Power Window Master Switch
DESCRIPTION If the manual up/down function can be performed but the auto up/down function cannot, then the fail-safe mode may be functioning. If the power window initialization (See page ) has not been performed, the auto up/down function will not operate. WIRING DIAGRAM CAUTION / NOTICE ...

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