Toyota Tacoma (2015-2018) Service Manual: Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129)
DESCRIPTION
These DTCs are stored when a communication malfunction occurs between ECUs that perform pre-collision system control.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
U0100 |
Lost Communication with ECM / PCM "A" |
When the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication error between the ECM and millimeter wave radar sensor assembly is detected for approximately 4 seconds. |
|
|
U0125 |
Lost Communication with Yaw Rate Sensor Module |
When the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication error between the yaw rate sensor (airbag sensor assembly) and millimeter wave radar sensor assembly is detected for approximately 1 second. |
|
|
U0126 |
Lost Communication with Steering Angle Sensor Module |
When the ignition switch is ON, a communication error between the steering angle sensor (spiral cable with sensor sub-assembly) and millimeter wave radar sensor assembly is detected for approximately 1 second. |
|
|
U0129 |
Lost Communication with Brake System Control Module |
When the ignition switch is ON, a communication error between the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 and millimeter wave radar sensor assembly is detected for approximately 6 seconds. |
|
- *1: for Hydraulic Brake Booster
- *2: for Vacuum Brake Booster
PROCEDURE
|
1. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here .gif)
(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.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U0100, U0125, U0126 and U0129 are not output |
A |
|
DTC U0100, U0125, U0126 or U0129 is output |
B |
| A | .gif) |
USE SIMULATION METHOD TO CHECK |
| B | |
GO TO CAN COMMUNICATION SYSTEM |
Heater Circuit (C1AAE)
DESCRIPTION
If the forward recognition camera detects a malfunction in the camera heater
(forward recognition hood) circuit, it will output a malfunction signal to the millimeter
wave radar senso ...
Lost Communication with Cruise Control Front Distance Range Sensor (U0235)
DESCRIPTION
The millimeter wave radar sensor assembly is connected to the skid control ECU
(master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 via
CAN communication. If c ...
Other materials:
Inspection
INSPECTION
PROCEDURE
1. INSPECT BRAKE BOOSTER PUMP ASSEMBLY
(a) Connect the positive (+) lead from the battery to the red cable of the pump,
and the negative (-) lead to the black cable.
(b) Check the brake booster pump operation.
OK:
Operation sound is heard. ...
Basic audio operations
Basic audio operations and functions common to each mode are explained in
this section.
Operating the multimedia system
1. Press this button to eject a disc
2. Insert a disc into the disc slot
3.“Select Audio Source” screen appears
4. Turn this knob to select radio station bands, tracks ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
PROCEDURE
1. PRECAUTION
CAUTION:
Be sure to read Precaution thoroughly before servicing (See page
).
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the negative (-) battery terminal. Therefore ...
