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:
Speaker Output Short (B15C3)
DESCRIPTION
This DTC is stored when a malfunction occurs in the speakers.
DTC No.
DTC Detection Condition
Trouble Area
B15C3
A short is detected in the speaker output circuit.
Harness or connector
Speaker
...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Air Conditioning System
DTC Code
Detection Item
Memory
See page
B1412
Ambient Temperature Sensor Circuit
Memorized
(4 seconds or more)
B1413
...
Open in Bus 5 Main Bus Line
DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance
between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway
ECU) is 70 Ω or higher.
Detection Item
Trouble Area
Resistance between ter ...