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:
Short in Front Passenger Side Squib 2nd Step Circuit (B1815/54-B1818/54)
DESCRIPTION
The front passenger side squib 2nd step circuit consists of the center airbag
sensor and instrument panel passenger airbag.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is ...
Inspection
INSPECTION
PROCEDURE
1. TRANSFER SYSTEM
NOTICE:
To shift from H2 to H4, move the transfer shift lever while keeping
the wheels facing straight ahead.
To shift from H4 to L4, stop the vehicle, move the shift lever to N
and then move the ...
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