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 |
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is output during the DTC check, inspect the trouble
areas listed for that code. For details of the code, refer to the "See page ...
Driver Side Solar Sensor Short Circuit (B14A2)
DESCRIPTION
The automatic light control sensor (solar sensor), which is installed on the
upper side of the instrument panel, detects sunlight and controls the air conditioning
in auto mode. The ...
Other materials about Toyota 4Runner:
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZING FUNCTION WITH TECHSTREAM
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Record the current se ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condit ...
0.114