Toyota 4Runner: Lost Communication with ECM (U0100,U0142,U0155)
DESCRIPTION
The air conditioning amplifier communicates with the ECM, main body ECU (multiplex network body ECU) and combination meter through the CAN communication system.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
U0100 |
Lost communication with the ECM. |
|
|
U0142 |
Lost communication with the main body ECU. |
|
|
U0155 |
Lost communication with the combination meter. |
|
PROCEDURE
|
1. |
CHECK FOR DTC (CAN COMMUNICATION SYSTEM) |
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Result|
Result |
Proceed to |
|---|---|
|
CAN DTC is not output |
A |
|
CAN DTC is output |
B |
| A | .gif) |
USE SIMULATION METHOD TO CHECK |
| B | |
GO TO CAN COMMUNICATION SYSTEM |
Compressor Lock Sensor Circuit (B1422)
SYSTEM DESCRIPTION
The ECM sends the engine speed signal to the air conditioning amplifier assembly
via CAN communication.
The air conditioning amplifier assembly reads the difference between comp ...
Air Outlet Damper Control Servo Motor Circuit (B1443)
DESCRIPTION
The damper servo sub-assembly (mode damper servo) sends pulse signals to inform
the No. 1 air conditioning amplifier assembly of the damper position. The No. 1
air conditioning amplif ...
Other materials about Toyota 4Runner:
Registration
REGISTRATION
PROCEDURE
1. DESCRIPTION OF CODE REGISTRATION
HINT:
The engine immobiliser function ID code is the same as the recognition
code for the smart key system and wireless transmitter. Registering an ID
code enables the smart key sys ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL DOOR CONTROL SWITCH ASSEMBLY
(a) Attach the 2 claws to install the door control switch assembly.
(b) Connect the door control switch connector.
2. INSTALL FRONT DO ...
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