Toyota 4Runner: Lost Communication with ECM/PCM "A" (U0100/71,U0122/71,U0124/71,U0126/71)
DESCRIPTION
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
U0100/71 |
While driving at 30 km/h (19 mph), the ECM indicates a CAN communication stop for 3 seconds or more. |
CAN communication system |
|
U0122/71 |
The skid control ECU indicates a CAN communication stop for 3 seconds or more. |
CAN communication system |
|
U0124/71 |
The yaw rate sensor indicates a CAN communication stop for 3 seconds or more. |
CAN communication system |
|
U0126/71 |
The steering angle sensor indicates a CAN communication stop for 3 seconds or more. |
CAN communication system |
PROCEDURE
|
1. |
CHECK DTC |
(a) Clear the DTCs (See page .gif)
).
(b) Perform a road test.
(c) Check for DTCs (See page ).
Result
|
Condition |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
HINT:
If a CAN communication malfunction DTC and a related sensor malfunction DTC are output at the same time, the CAN communication malfunction must be repaired before troubleshooting the sensor malfunction DTC.
| A | .gif) |
USE SIMULATION METHOD TO CHECK |
| B | |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
KDSS ECU Malfunction (C1881/81)
DESCRIPTION
The stabilizer control ECU stores DTC C1881/81 when internal ECU malfunctions
occur.
DTC Code
DTC Detection Condition
Trouble Area
C18 ...
Low Pressure Malfunction in Upside of KDSS System (C1851/51,C1853/53)
DESCRIPTION
In the KDSS hydraulic circuit, the fluid is contained under pressure. If the
fluid temperature is 20°C (68°F), the pressure is approximately 3.0 MPa (30.6 kgf/cm2,
435 psi).
...
Other materials about Toyota 4Runner:
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
NOTICE:
In the table below, the valves listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when deciding whether a part
is faulty or not.
HINT:
Using the T ...
Replacement
REPLACEMENT
PROCEDURE
1. RECOVER REFRIGERANT FROM REFRIGERATION SYSTEM
(a) Start the engine.
(b) Turn the A/C switch on.
(c) Operate the cooler compressor while the engine speed is approximately 1000
rpm for 5 to 6 minutes to circulate the refrigerant a ...
0.1061