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 .gif)
w/ Smart Key System: Click here
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.
HINT:
If the following procedure is not performed, the previously output DTC cannot be detected.
- Drive the vehicle at a speed for which dynamic radar cruise control operation is possible.
- Turn the dynamic radar cruise control system on using the cruise control main switch.
- Depress the brake pedal for 1 second or more.
(c) Check for DTCs.
Click here
OK:
DTC P057504 and P057549 are not output.
| OK | .gif) |
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:
Electronic Circuit Inspection Procedure
ELECTRONIC CIRCUIT INSPECTION PROCEDURE
1. BASIC INSPECTION
(a) WHEN MEASURING RESISTANCE OF ELECTRONIC PARTS
(1) Unless otherwise stated, all resistance measurements should be made at an
ambient temperature of 20°C (68°F). Resistance measurements may be inaccurate if
measured at high tempe ...
Components
COMPONENTS
ILLUSTRATION
*1
FRONT FENDER LINER
*2
FRONT NO.1 WHEEL OPENING EXTENSION PAD
*3
FOG LIGHT UNIT
-
-
...
Precaution
PRECAUTION
1. The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
Engine Switch (Condition)
...
