Toyota Tacoma 2015-2018 Service Manual: Lost Communication with ECM / PCM "A" (U0100-U0142,U0155)
DESCRIPTION
These DTCs are stored when the clearance warning ECU assembly cannot receive and recognize several signals via the CAN communication system.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
U0100 |
Lost Communication with ECM / PCM "A" |
CAN communication system |
|
U0101 |
Lost Communication with TCM |
|
|
U0142 |
Lost Communication with Body Control Module "B" |
|
|
U0155 |
Lost Communication with Instrument Panel Cluster Control Module (Combination Meter) |
HINT:
When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harnesses of each ECU.
PROCEDURE
|
1. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page .gif)
).
(b) Check for DTCs (See page ).
|
Result |
Proceed to |
|---|---|
|
DTCs (CAN communication system DTC) are output |
A |
|
No DTCs are output |
B |
| A | .gif) |
GO TO CAN COMMUNICATION SYSTEM |
| B | |
USE SIMULATION METHOD TO CHECK |
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Intuitive Parking Assist System
DTC Code
Detection Item
See page
C1AE6
Rear Left Sensor Malfunction
...
Rear Right Center Sensor Malfunction (C1AE8)
DESCRIPTION
The No. 1 ultrasonic sensor (rear center sensor RH) is installed on the rear
bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic
sensor (rear center ...
Other materials:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the pre-collision system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Lost Communication with ECM / PCM "A" (U0100,U0104,U0122,U0125,U0126,U0129)
DESCRIPTION
The millimeter wave radar sensor assembly and ECM communicate with each sensor
and ECU via CAN communication.
If any malfunction is detected in a CAN communication circuit, one or more CAN
communication system DTCs are stored.
DTC No.
Detection Item
...
Manual Shifting Test
MANUAL SHIFTING TEST
1. PERFORM MANUAL SHIFTING TEST
HINT:
Using this test, it can be determined whether a problem is in an electrical
circuit or if it is a mechanical problem in the transmission.
If any abnormalities are found in the following test, the problem is
in the tran ...